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Message-Id: <200811250238.53883.rusty@rustcorp.com.au>
Date: Tue, 25 Nov 2008 02:38:53 +1030
From: Rusty Russell <rusty@...tcorp.com.au>
To: Ingo Molnar <mingo@...e.hu>
Cc: Mike Travis <travis@....com>, linux-kernel@...r.kernel.org
Subject: [PULL] cpumask conversion patches for sched
Hi Ingo,
Keeping track of sched.c changes without breaking linux-next has
proven impossible, so I've split the sched patches out for you, split
them nicely, and rebased against your linux-2.6-sched. Please pull.
Works for me (with and without CONFIG_CPUMASK_OFFSTACK), but
there are a large number of config variations possible that I might
have broken. Not to mention outright bugs.
The following changes since commit b27fef5b222564b6e7ae71f7110c233b2fb45a38:
Ingo Molnar (1):
Merge branch 'x86/defconfig'
are available in the git repository at:
ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-ingo.git master
Mike Travis (1):
sched: Reduce stack size requirements in kernel/sched.c
Rusty Russell (20):
sched: convert sched.c from for_each_cpu_mask to for_each_cpu.
sched: get rid of boutique sched.c allocations, use cpumask_var_t.
sched: remove any_online_cpu()
sched: wrap sched_group and sched_domain cpumask accesses.
sched: convert struct sched_group/sched_domain cpumask_ts to variable bitmaps
sched: convert nohz_cpu_mask to cpumask_var_t.
sched: convert struct root_domain to cpumask_var_t.
sched: convert nohz struct to cpumask_var_t.
sched: convert idle_balance() to cpumask_var_t.
sched: convert rebalance_domains() to cpumask_var_t.
sched: convert sys_sched_getaffinity() to cpumask_var_t.
sched: avoid stack var in move_task_off_dead_cpu
sched: convert struct (sys_)sched_setaffinity() to cpumask_var_t.
sched: convert sched_domain_debug to cpumask_var_t.
sched: convert cpu_isolated_map to cpumask_var_t.
sched: convert falback_doms to cpumask_var_t.
sched: convert struct cpupri_vec cpumask_var_t.
sched: convert check_preempt_equal_prio to cpumask_var_t.
sched: convert local_cpu_mask to cpumask_var_t.
sched: convert remaining old-style cpumask operators
include/linux/sched.h | 35 ++-
kernel/rcuclassic.c | 2 +-
kernel/sched.c | 885 +++++++++++++++++++++++++---------------------
kernel/sched_cpupri.c | 39 ++-
kernel/sched_cpupri.h | 5 +-
kernel/sched_fair.c | 14 +-
kernel/sched_rt.c | 73 +++--
kernel/sched_stats.h | 3 +-
kernel/time/tick-sched.c | 10 +-
9 files changed, 589 insertions(+), 477 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index e22cb72..e51da83 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -249,7 +249,7 @@ extern void init_idle_bootup_task(struct task_struct *idle);
extern int runqueue_is_locked(void);
extern void task_rq_unlock_wait(struct task_struct *p);
-extern cpumask_t nohz_cpu_mask;
+extern cpumask_var_t nohz_cpu_mask;
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
extern int select_nohz_load_balancer(int cpu);
#else
@@ -771,7 +771,6 @@ enum cpu_idle_type {
struct sched_group {
struct sched_group *next; /* Must be a circular list */
- cpumask_t cpumask;
/*
* CPU power of this group, SCHED_LOAD_SCALE being max power for a
@@ -784,8 +783,15 @@ struct sched_group {
* (see include/linux/reciprocal_div.h)
*/
u32 reciprocal_cpu_power;
+
+ unsigned long cpumask[];
};
+static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
+{
+ return to_cpumask(sg->cpumask);
+}
+
enum sched_domain_level {
SD_LV_NONE = 0,
SD_LV_SIBLING,
@@ -809,7 +815,6 @@ struct sched_domain {
struct sched_domain *parent; /* top domain must be null terminated */
struct sched_domain *child; /* bottom domain must be null terminated */
struct sched_group *groups; /* the balancing groups of the domain */
- cpumask_t span; /* span of all CPUs in this domain */
unsigned long min_interval; /* Minimum balance interval ms */
unsigned long max_interval; /* Maximum balance interval ms */
unsigned int busy_factor; /* less balancing by factor if busy */
@@ -864,9 +869,17 @@ struct sched_domain {
#ifdef CONFIG_SCHED_DEBUG
char *name;
#endif
+
+ /* span of all CPUs in this domain */
+ unsigned long span[];
};
-extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
+static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
+{
+ return to_cpumask(sd->span);
+}
+
+extern void partition_sched_domains(int ndoms_new, struct cpumask *doms_new,
struct sched_domain_attr *dattr_new);
extern int arch_reinit_sched_domains(void);
@@ -875,7 +888,7 @@ extern int arch_reinit_sched_domains(void);
struct sched_domain_attr;
static inline void
-partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
+partition_sched_domains(int ndoms_new, struct cpumask *doms_new,
struct sched_domain_attr *dattr_new)
{
}
@@ -957,7 +970,7 @@ struct sched_class {
void (*task_wake_up) (struct rq *this_rq, struct task_struct *task);
void (*set_cpus_allowed)(struct task_struct *p,
- const cpumask_t *newmask);
+ const struct cpumask *newmask);
void (*rq_online)(struct rq *rq);
void (*rq_offline)(struct rq *rq);
@@ -1598,12 +1611,12 @@ extern cputime_t task_gtime(struct task_struct *p);
#ifdef CONFIG_SMP
extern int set_cpus_allowed_ptr(struct task_struct *p,
- const cpumask_t *new_mask);
+ const struct cpumask *new_mask);
#else
static inline int set_cpus_allowed_ptr(struct task_struct *p,
- const cpumask_t *new_mask)
+ const struct cpumask *new_mask)
{
- if (!cpu_isset(0, *new_mask))
+ if (!cpumask_test_cpu(0, new_mask))
return -EINVAL;
return 0;
}
@@ -2229,8 +2242,8 @@ __trace_special(void *__tr, void *__data,
}
#endif
-extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
-extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
+extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
+extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
extern int sched_mc_power_savings, sched_smt_power_savings;
diff --git a/kernel/rcuclassic.c b/kernel/rcuclassic.c
index e503a00..c03ca3e 100644
--- a/kernel/rcuclassic.c
+++ b/kernel/rcuclassic.c
@@ -393,7 +393,7 @@ static void rcu_start_batch(struct rcu_ctrlblk *rcp)
* unnecessarily.
*/
smp_mb();
- cpus_andnot(rcp->cpumask, cpu_online_map, nohz_cpu_mask);
+ cpumask_andnot(&rcp->cpumask, cpu_online_mask, nohz_cpu_mask);
rcp->signaled = 0;
}
diff --git a/kernel/sched.c b/kernel/sched.c
index f6d6ea3..92a35c0 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -487,14 +487,14 @@ struct rt_rq {
*/
struct root_domain {
atomic_t refcount;
- cpumask_t span;
- cpumask_t online;
+ cpumask_var_t span;
+ cpumask_var_t online;
/*
* The "RT overload" flag: it gets set if a CPU has more than
* one runnable RT task.
*/
- cpumask_t rto_mask;
+ cpumask_var_t rto_mask;
atomic_t rto_count;
#ifdef CONFIG_SMP
struct cpupri cpupri;
@@ -1501,7 +1501,7 @@ static int tg_shares_up(struct task_group *tg, void *data)
struct sched_domain *sd = data;
int i;
- for_each_cpu_mask(i, sd->span) {
+ for_each_cpu(i, sched_domain_span(sd)) {
/*
* If there are currently no tasks on the cpu pretend there
* is one of average load so that when a new task gets to
@@ -1522,7 +1522,7 @@ static int tg_shares_up(struct task_group *tg, void *data)
if (!sd->parent || !(sd->parent->flags & SD_LOAD_BALANCE))
shares = tg->shares;
- for_each_cpu_mask(i, sd->span)
+ for_each_cpu(i, sched_domain_span(sd))
update_group_shares_cpu(tg, i, shares, rq_weight);
return 0;
@@ -2053,15 +2053,17 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int
this_cpu)
int i;
/* Skip over this group if it has no CPUs allowed */
- if (!cpus_intersects(group->cpumask, p->cpus_allowed))
+ if (!cpumask_intersects(sched_group_cpus(group),
+ &p->cpus_allowed))
continue;
- local_group = cpu_isset(this_cpu, group->cpumask);
+ local_group = cpumask_test_cpu(this_cpu,
+ sched_group_cpus(group));
/* Tally up the load of all CPUs in the group */
avg_load = 0;
- for_each_cpu_mask_nr(i, group->cpumask) {
+ for_each_cpu(i, sched_group_cpus(group)) {
/* Bias balancing toward cpus of our domain */
if (local_group)
load = source_load(i, load_idx);
@@ -2093,17 +2095,14 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int
this_cpu)
* find_idlest_cpu - find the idlest cpu among the cpus in group.
*/
static int
-find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu,
- cpumask_t *tmp)
+find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
{
unsigned long load, min_load = ULONG_MAX;
int idlest = -1;
int i;
/* Traverse only the allowed CPUs */
- cpus_and(*tmp, group->cpumask, p->cpus_allowed);
-
- for_each_cpu_mask_nr(i, *tmp) {
+ for_each_cpu_and(i, sched_group_cpus(group), &p->cpus_allowed) {
load = weighted_cpuload(i);
if (load < min_load || (load == min_load && i == this_cpu)) {
@@ -2145,7 +2144,6 @@ static int sched_balance_self(int cpu, int flag)
update_shares(sd);
while (sd) {
- cpumask_t span, tmpmask;
struct sched_group *group;
int new_cpu, weight;
@@ -2154,14 +2152,13 @@ static int sched_balance_self(int cpu, int flag)
continue;
}
- span = sd->span;
group = find_idlest_group(sd, t, cpu);
if (!group) {
sd = sd->child;
continue;
}
- new_cpu = find_idlest_cpu(group, t, cpu, &tmpmask);
+ new_cpu = find_idlest_cpu(group, t, cpu);
if (new_cpu == -1 || new_cpu == cpu) {
/* Now try balancing at a lower domain level of cpu */
sd = sd->child;
@@ -2170,10 +2167,10 @@ static int sched_balance_self(int cpu, int flag)
/* Now try balancing at a lower domain level of new_cpu */
cpu = new_cpu;
+ weight = cpumask_weight(sched_domain_span(sd));
sd = NULL;
- weight = cpus_weight(span);
for_each_domain(cpu, tmp) {
- if (weight <= cpus_weight(tmp->span))
+ if (weight <= cpumask_weight(sched_domain_span(tmp)))
break;
if (tmp->flags & flag)
sd = tmp;
@@ -2218,7 +2215,7 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state,
int sync)
cpu = task_cpu(p);
for_each_domain(this_cpu, sd) {
- if (cpu_isset(cpu, sd->span)) {
+ if (cpumask_test_cpu(cpu, sched_domain_span(sd))) {
update_shares(sd);
break;
}
@@ -2266,7 +2263,7 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state,
int sync)
else {
struct sched_domain *sd;
for_each_domain(this_cpu, sd) {
- if (cpu_isset(cpu, sd->span)) {
+ if (cpumask_test_cpu(cpu, sched_domain_span(sd))) {
schedstat_inc(sd, ttwu_wake_remote);
break;
}
@@ -2832,7 +2829,7 @@ static void sched_migrate_task(struct task_struct *p, int dest_cpu)
struct rq *rq;
rq = task_rq_lock(p, &flags);
- if (!cpu_isset(dest_cpu, p->cpus_allowed)
+ if (!cpumask_test_cpu(dest_cpu, &p->cpus_allowed)
|| unlikely(!cpu_active(dest_cpu)))
goto out;
@@ -2898,7 +2895,7 @@ int can_migrate_task(struct task_struct *p, struct rq *rq, int
this_cpu,
* 2) cannot be migrated to this CPU due to cpus_allowed, or
* 3) are cache-hot on their current CPU.
*/
- if (!cpu_isset(this_cpu, p->cpus_allowed)) {
+ if (!cpumask_test_cpu(this_cpu, &p->cpus_allowed)) {
schedstat_inc(p, se.nr_failed_migrations_affine);
return 0;
}
@@ -3073,7 +3070,7 @@ static int move_one_task(struct rq *this_rq, int this_cpu, struct rq
*busiest,
static struct sched_group *
find_busiest_group(struct sched_domain *sd, int this_cpu,
unsigned long *imbalance, enum cpu_idle_type idle,
- int *sd_idle, const cpumask_t *cpus, int *balance)
+ int *sd_idle, const struct cpumask *cpus, int *balance)
{
struct sched_group *busiest = NULL, *this = NULL, *group = sd->groups;
unsigned long max_load, avg_load, total_load, this_load, total_pwr;
@@ -3109,10 +3106,11 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
unsigned long sum_avg_load_per_task;
unsigned long avg_load_per_task;
- local_group = cpu_isset(this_cpu, group->cpumask);
+ local_group = cpumask_test_cpu(this_cpu,
+ sched_group_cpus(group));
if (local_group)
- balance_cpu = first_cpu(group->cpumask);
+ balance_cpu = cpumask_first(sched_group_cpus(group));
/* Tally up the load of all CPUs in the group */
sum_weighted_load = sum_nr_running = avg_load = 0;
@@ -3121,13 +3119,8 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
max_cpu_load = 0;
min_cpu_load = ~0UL;
- for_each_cpu_mask_nr(i, group->cpumask) {
- struct rq *rq;
-
- if (!cpu_isset(i, *cpus))
- continue;
-
- rq = cpu_rq(i);
+ for_each_cpu_and(i, sched_group_cpus(group), cpus) {
+ struct rq *rq = cpu_rq(i);
if (*sd_idle && rq->nr_running)
*sd_idle = 0;
@@ -3238,8 +3231,8 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
*/
if ((sum_nr_running < min_nr_running) ||
(sum_nr_running == min_nr_running &&
- first_cpu(group->cpumask) <
- first_cpu(group_min->cpumask))) {
+ cpumask_first(sched_group_cpus(group)) <
+ cpumask_first(sched_group_cpus(group_min)))) {
group_min = group;
min_nr_running = sum_nr_running;
min_load_per_task = sum_weighted_load /
@@ -3254,8 +3247,8 @@ find_busiest_group(struct sched_domain *sd, int this_cpu,
if (sum_nr_running <= group_capacity - 1) {
if (sum_nr_running > leader_nr_running ||
(sum_nr_running == leader_nr_running &&
- first_cpu(group->cpumask) >
- first_cpu(group_leader->cpumask))) {
+ cpumask_first(sched_group_cpus(group)) >
+ cpumask_first(sched_group_cpus(group_leader)))) {
group_leader = group;
leader_nr_running = sum_nr_running;
}
@@ -3394,16 +3387,16 @@ ret:
*/
static struct rq *
find_busiest_queue(struct sched_group *group, enum cpu_idle_type idle,
- unsigned long imbalance, const cpumask_t *cpus)
+ unsigned long imbalance, const struct cpumask *cpus)
{
struct rq *busiest = NULL, *rq;
unsigned long max_load = 0;
int i;
- for_each_cpu_mask_nr(i, group->cpumask) {
+ for_each_cpu(i, sched_group_cpus(group)) {
unsigned long wl;
- if (!cpu_isset(i, *cpus))
+ if (!cpumask_test_cpu(i, cpus))
continue;
rq = cpu_rq(i);
@@ -3433,7 +3426,7 @@ find_busiest_queue(struct sched_group *group, enum cpu_idle_type idle,
*/
static int load_balance(int this_cpu, struct rq *this_rq,
struct sched_domain *sd, enum cpu_idle_type idle,
- int *balance, cpumask_t *cpus)
+ int *balance, struct cpumask *cpus)
{
int ld_moved, all_pinned = 0, active_balance = 0, sd_idle = 0;
struct sched_group *group;
@@ -3441,7 +3434,7 @@ static int load_balance(int this_cpu, struct rq *this_rq,
struct rq *busiest;
unsigned long flags;
- cpus_setall(*cpus);
+ cpumask_setall(cpus);
/*
* When power savings policy is enabled for the parent domain, idle
@@ -3501,8 +3494,8 @@ redo:
/* All tasks on this runqueue were pinned by CPU affinity */
if (unlikely(all_pinned)) {
- cpu_clear(cpu_of(busiest), *cpus);
- if (!cpus_empty(*cpus))
+ cpumask_clear_cpu(cpu_of(busiest), cpus);
+ if (!cpumask_empty(cpus))
goto redo;
goto out_balanced;
}
@@ -3519,7 +3512,8 @@ redo:
/* don't kick the migration_thread, if the curr
* task on busiest cpu can't be moved to this_cpu
*/
- if (!cpu_isset(this_cpu, busiest->curr->cpus_allowed)) {
+ if (!cpumask_test_cpu(this_cpu,
+ &busiest->curr->cpus_allowed)) {
spin_unlock_irqrestore(&busiest->lock, flags);
all_pinned = 1;
goto out_one_pinned;
@@ -3594,7 +3588,7 @@ out:
*/
static int
load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd,
- cpumask_t *cpus)
+ struct cpumask *cpus)
{
struct sched_group *group;
struct rq *busiest = NULL;
@@ -3603,7 +3597,7 @@ load_balance_newidle(int this_cpu, struct rq *this_rq, struct
sched_domain *sd,
int sd_idle = 0;
int all_pinned = 0;
- cpus_setall(*cpus);
+ cpumask_setall(cpus);
/*
* When power savings policy is enabled for the parent domain, idle
@@ -3647,8 +3641,8 @@ redo:
double_unlock_balance(this_rq, busiest);
if (unlikely(all_pinned)) {
- cpu_clear(cpu_of(busiest), *cpus);
- if (!cpus_empty(*cpus))
+ cpumask_clear_cpu(cpu_of(busiest), cpus);
+ if (!cpumask_empty(cpus))
goto redo;
}
}
@@ -3683,7 +3677,10 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
struct sched_domain *sd;
int pulled_task = -1;
unsigned long next_balance = jiffies + HZ;
- cpumask_t tmpmask;
+ cpumask_var_t tmpmask;
+
+ if (!alloc_cpumask_var(&tmpmask, GFP_ATOMIC))
+ return;
for_each_domain(this_cpu, sd) {
unsigned long interval;
@@ -3694,7 +3691,7 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
if (sd->flags & SD_BALANCE_NEWIDLE)
/* If we've pulled tasks over stop searching: */
pulled_task = load_balance_newidle(this_cpu, this_rq,
- sd, &tmpmask);
+ sd, tmpmask);
interval = msecs_to_jiffies(sd->balance_interval);
if (time_after(next_balance, sd->last_balance + interval))
@@ -3709,6 +3706,7 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
*/
this_rq->next_balance = next_balance;
}
+ free_cpumask_var(tmpmask);
}
/*
@@ -3746,7 +3744,7 @@ static void active_load_balance(struct rq *busiest_rq, int busiest_cpu)
/* Search for an sd spanning us and the target CPU. */
for_each_domain(target_cpu, sd) {
if ((sd->flags & SD_LOAD_BALANCE) &&
- cpu_isset(busiest_cpu, sd->span))
+ cpumask_test_cpu(busiest_cpu, sched_domain_span(sd)))
break;
}
@@ -3765,10 +3763,9 @@ static void active_load_balance(struct rq *busiest_rq, int
busiest_cpu)
#ifdef CONFIG_NO_HZ
static struct {
atomic_t load_balancer;
- cpumask_t cpu_mask;
+ cpumask_var_t cpu_mask;
} nohz ____cacheline_aligned = {
.load_balancer = ATOMIC_INIT(-1),
- .cpu_mask = CPU_MASK_NONE,
};
/*
@@ -3796,7 +3793,7 @@ int select_nohz_load_balancer(int stop_tick)
int cpu = smp_processor_id();
if (stop_tick) {
- cpu_set(cpu, nohz.cpu_mask);
+ cpumask_set_cpu(cpu, nohz.cpu_mask);
cpu_rq(cpu)->in_nohz_recently = 1;
/*
@@ -3810,7 +3807,7 @@ int select_nohz_load_balancer(int stop_tick)
}
/* time for ilb owner also to sleep */
- if (cpus_weight(nohz.cpu_mask) == num_online_cpus()) {
+ if (cpumask_weight(nohz.cpu_mask) == num_online_cpus()) {
if (atomic_read(&nohz.load_balancer) == cpu)
atomic_set(&nohz.load_balancer, -1);
return 0;
@@ -3823,10 +3820,10 @@ int select_nohz_load_balancer(int stop_tick)
} else if (atomic_read(&nohz.load_balancer) == cpu)
return 1;
} else {
- if (!cpu_isset(cpu, nohz.cpu_mask))
+ if (!cpumask_test_cpu(cpu, nohz.cpu_mask))
return 0;
- cpu_clear(cpu, nohz.cpu_mask);
+ cpumask_clear_cpu(cpu, nohz.cpu_mask);
if (atomic_read(&nohz.load_balancer) == cpu)
if (atomic_cmpxchg(&nohz.load_balancer, cpu, -1) != cpu)
@@ -3854,7 +3851,11 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle)
unsigned long next_balance = jiffies + 60*HZ;
int update_next_balance = 0;
int need_serialize;
- cpumask_t tmp;
+ cpumask_var_t tmp;
+
+ /* Fails alloc? Rebalancing probably not a priority right now. */
+ if (!alloc_cpumask_var(&tmp, GFP_ATOMIC))
+ return;
for_each_domain(cpu, sd) {
if (!(sd->flags & SD_LOAD_BALANCE))
@@ -3879,7 +3880,7 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle)
}
if (time_after_eq(jiffies, sd->last_balance + interval)) {
- if (load_balance(cpu, rq, sd, idle, &balance, &tmp)) {
+ if (load_balance(cpu, rq, sd, idle, &balance, tmp)) {
/*
* We've pulled tasks over so either we're no
* longer idle, or one of our SMT siblings is
@@ -3913,6 +3914,8 @@ out:
*/
if (likely(update_next_balance))
rq->next_balance = next_balance;
+
+ free_cpumask_var(tmp);
}
/*
@@ -3937,12 +3940,13 @@ static void run_rebalance_domains(struct softirq_action *h)
*/
if (this_rq->idle_at_tick &&
atomic_read(&nohz.load_balancer) == this_cpu) {
- cpumask_t cpus = nohz.cpu_mask;
struct rq *rq;
int balance_cpu;
- cpu_clear(this_cpu, cpus);
- for_each_cpu_mask_nr(balance_cpu, cpus) {
+ for_each_cpu(balance_cpu, nohz.cpu_mask) {
+ if (balance_cpu == this_cpu)
+ continue;
+
/*
* If this cpu gets work to do, stop the load balancing
* work being done for other cpus. Next load
@@ -3980,7 +3984,7 @@ static inline void trigger_load_balance(struct rq *rq, int cpu)
rq->in_nohz_recently = 0;
if (atomic_read(&nohz.load_balancer) == cpu) {
- cpu_clear(cpu, nohz.cpu_mask);
+ cpumask_clear_cpu(cpu, nohz.cpu_mask);
atomic_set(&nohz.load_balancer, -1);
}
@@ -3993,7 +3997,7 @@ static inline void trigger_load_balance(struct rq *rq, int cpu)
* TBD: Traverse the sched domains and nominate
* the nearest cpu in the nohz.cpu_mask.
*/
- int ilb = first_cpu(nohz.cpu_mask);
+ int ilb = cpumask_first(nohz.cpu_mask);
if (ilb < nr_cpu_ids)
resched_cpu(ilb);
@@ -4005,7 +4009,7 @@ static inline void trigger_load_balance(struct rq *rq, int cpu)
* cpus with ticks stopped, is it time for that to stop?
*/
if (rq->idle_at_tick && atomic_read(&nohz.load_balancer) == cpu &&
- cpus_weight(nohz.cpu_mask) == num_online_cpus()) {
+ cpumask_weight(nohz.cpu_mask) == num_online_cpus()) {
resched_cpu(cpu);
return;
}
@@ -4015,7 +4019,7 @@ static inline void trigger_load_balance(struct rq *rq, int cpu)
* someone else, then no need raise the SCHED_SOFTIRQ
*/
if (rq->idle_at_tick && atomic_read(&nohz.load_balancer) != cpu &&
- cpu_isset(cpu, nohz.cpu_mask))
+ cpumask_test_cpu(cpu, nohz.cpu_mask))
return;
#endif
if (time_after_eq(jiffies, rq->next_balance))
@@ -5373,10 +5377,9 @@ out_unlock:
return retval;
}
-long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
+long sched_setaffinity(pid_t pid, const struct cpumask *in_mask)
{
- cpumask_t cpus_allowed;
- cpumask_t new_mask = *in_mask;
+ cpumask_var_t cpus_allowed, new_mask;
struct task_struct *p;
int retval;
@@ -5398,6 +5401,14 @@ long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
get_task_struct(p);
read_unlock(&tasklist_lock);
+ if (!alloc_cpumask_var(&cpus_allowed, GFP_KERNEL)) {
+ retval = -ENOMEM;
+ goto out_put_task;
+ }
+ if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) {
+ retval = -ENOMEM;
+ goto out_free_cpus_allowed;
+ }
retval = -EPERM;
if ((current->euid != p->euid) && (current->euid != p->uid) &&
!capable(CAP_SYS_NICE))
@@ -5407,37 +5418,41 @@ long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
if (retval)
goto out_unlock;
- cpuset_cpus_allowed(p, &cpus_allowed);
- cpus_and(new_mask, new_mask, cpus_allowed);
+ cpuset_cpus_allowed(p, cpus_allowed);
+ cpumask_and(new_mask, in_mask, cpus_allowed);
again:
- retval = set_cpus_allowed_ptr(p, &new_mask);
+ retval = set_cpus_allowed_ptr(p, new_mask);
if (!retval) {
- cpuset_cpus_allowed(p, &cpus_allowed);
- if (!cpus_subset(new_mask, cpus_allowed)) {
+ cpuset_cpus_allowed(p, cpus_allowed);
+ if (!cpumask_subset(new_mask, cpus_allowed)) {
/*
* We must have raced with a concurrent cpuset
* update. Just reset the cpus_allowed to the
* cpuset's cpus_allowed
*/
- new_mask = cpus_allowed;
+ cpumask_copy(new_mask, cpus_allowed);
goto again;
}
}
out_unlock:
+ free_cpumask_var(new_mask);
+out_free_cpus_allowed:
+ free_cpumask_var(cpus_allowed);
+out_put_task:
put_task_struct(p);
put_online_cpus();
return retval;
}
static int get_user_cpu_mask(unsigned long __user *user_mask_ptr, unsigned len,
- cpumask_t *new_mask)
+ struct cpumask *new_mask)
{
- if (len < sizeof(cpumask_t)) {
- memset(new_mask, 0, sizeof(cpumask_t));
- } else if (len > sizeof(cpumask_t)) {
- len = sizeof(cpumask_t);
- }
+ if (len < cpumask_size())
+ cpumask_clear(new_mask);
+ else if (len > cpumask_size())
+ len = cpumask_size();
+
return copy_from_user(new_mask, user_mask_ptr, len) ? -EFAULT : 0;
}
@@ -5450,17 +5465,20 @@ static int get_user_cpu_mask(unsigned long __user *user_mask_ptr,
unsigned len,
asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
unsigned long __user *user_mask_ptr)
{
- cpumask_t new_mask;
+ cpumask_var_t new_mask;
int retval;
- retval = get_user_cpu_mask(user_mask_ptr, len, &new_mask);
- if (retval)
- return retval;
+ if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
+ return -ENOMEM;
- return sched_setaffinity(pid, &new_mask);
+ retval = get_user_cpu_mask(user_mask_ptr, len, new_mask);
+ if (retval == 0)
+ retval = sched_setaffinity(pid, new_mask);
+ free_cpumask_var(new_mask);
+ return retval;
}
-long sched_getaffinity(pid_t pid, cpumask_t *mask)
+long sched_getaffinity(pid_t pid, struct cpumask *mask)
{
struct task_struct *p;
int retval;
@@ -5477,7 +5495,7 @@ long sched_getaffinity(pid_t pid, cpumask_t *mask)
if (retval)
goto out_unlock;
- cpus_and(*mask, p->cpus_allowed, cpu_online_map);
+ cpumask_and(mask, &p->cpus_allowed, cpu_online_mask);
out_unlock:
read_unlock(&tasklist_lock);
@@ -5496,19 +5514,24 @@ asmlinkage long sys_sched_getaffinity(pid_t pid, unsigned int len,
unsigned long __user *user_mask_ptr)
{
int ret;
- cpumask_t mask;
+ cpumask_var_t mask;
- if (len < sizeof(cpumask_t))
+ if (len < cpumask_size())
return -EINVAL;
- ret = sched_getaffinity(pid, &mask);
- if (ret < 0)
- return ret;
+ if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+ return -ENOMEM;
- if (copy_to_user(user_mask_ptr, &mask, sizeof(cpumask_t)))
- return -EFAULT;
+ ret = sched_getaffinity(pid, mask);
+ if (ret == 0) {
+ if (copy_to_user(user_mask_ptr, mask, cpumask_size()))
+ ret = -EFAULT;
+ else
+ ret = cpumask_size();
+ }
+ free_cpumask_var(mask);
- return sizeof(cpumask_t);
+ return ret;
}
/**
@@ -5845,7 +5868,7 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
idle->se.exec_start = sched_clock();
idle->prio = idle->normal_prio = MAX_PRIO;
- idle->cpus_allowed = cpumask_of_cpu(cpu);
+ cpumask_copy(&idle->cpus_allowed, cpumask_of(cpu));
__set_task_cpu(idle, cpu);
rq->curr = rq->idle = idle;
@@ -5872,9 +5895,9 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
* indicates which cpus entered this state. This is used
* in the rcu update to wait only for active cpus. For system
* which do not switch off the HZ timer nohz_cpu_mask should
- * always be CPU_MASK_NONE.
+ * always be CPU_BITS_NONE.
*/
-cpumask_t nohz_cpu_mask = CPU_MASK_NONE;
+cpumask_var_t nohz_cpu_mask;
/*
* Increase the granularity value when there are more CPUs,
@@ -5929,7 +5952,7 @@ static inline void sched_init_granularity(void)
* task must not exit() & deallocate itself prematurely. The
* call is not atomic; no spinlocks may be held.
*/
-int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t *new_mask)
+int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
{
struct migration_req req;
unsigned long flags;
@@ -5937,13 +5960,13 @@ int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t
*new_mask)
int ret = 0;
rq = task_rq_lock(p, &flags);
- if (!cpus_intersects(*new_mask, cpu_online_map)) {
+ if (!cpumask_intersects(new_mask, cpu_online_mask)) {
ret = -EINVAL;
goto out;
}
if (unlikely((p->flags & PF_THREAD_BOUND) && p != current &&
- !cpus_equal(p->cpus_allowed, *new_mask))) {
+ !cpumask_equal(&p->cpus_allowed, new_mask))) {
ret = -EINVAL;
goto out;
}
@@ -5951,15 +5974,15 @@ int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t
*new_mask)
if (p->sched_class->set_cpus_allowed)
p->sched_class->set_cpus_allowed(p, new_mask);
else {
- p->cpus_allowed = *new_mask;
- p->rt.nr_cpus_allowed = cpus_weight(*new_mask);
+ cpumask_copy(&p->cpus_allowed, new_mask);
+ p->rt.nr_cpus_allowed = cpumask_weight(new_mask);
}
/* Can the task run on the task's current CPU? If so, we're done */
- if (cpu_isset(task_cpu(p), *new_mask))
+ if (cpumask_test_cpu(task_cpu(p), new_mask))
goto out;
- if (migrate_task(p, any_online_cpu(*new_mask), &req)) {
+ if (migrate_task(p, cpumask_any_and(cpu_online_mask, new_mask), &req)) {
/* Need help from migration thread: drop lock and wait. */
task_rq_unlock(rq, &flags);
wake_up_process(rq->migration_thread);
@@ -6001,7 +6024,7 @@ static int __migrate_task(struct task_struct *p, int src_cpu, int
dest_cpu)
if (task_cpu(p) != src_cpu)
goto done;
/* Affinity changed (again). */
- if (!cpu_isset(dest_cpu, p->cpus_allowed))
+ if (!cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
goto fail;
on_rq = p->se.on_rq;
@@ -6099,49 +6122,46 @@ static int __migrate_task_irq(struct task_struct *p, int src_cpu, int
dest_cpu)
static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
{
unsigned long flags;
- cpumask_t mask;
struct rq *rq;
int dest_cpu;
+ /* FIXME: Use cpumask_of_node here. */
+ cpumask_t _nodemask = node_to_cpumask(cpu_to_node(dead_cpu));
+ const struct cpumask *nodemask = &_nodemask;
+
+again:
+ /* Look for allowed, online CPU in same node. */
+ for_each_cpu_and(dest_cpu, nodemask, cpu_online_mask)
+ if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
+ goto move;
+
+ /* Any allowed, online CPU? */
+ dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_online_mask);
+ if (dest_cpu < nr_cpu_ids)
+ goto move;
+
+ /* No more Mr. Nice Guy. */
+ if (dest_cpu >= nr_cpu_ids) {
+ rq = task_rq_lock(p, &flags);
+ cpuset_cpus_allowed_locked(p, &p->cpus_allowed);
+ dest_cpu = cpumask_any_and(cpu_online_mask, &p->cpus_allowed);
+ task_rq_unlock(rq, &flags);
- do {
- /* On same node? */
- mask = node_to_cpumask(cpu_to_node(dead_cpu));
- cpus_and(mask, mask, p->cpus_allowed);
- dest_cpu = any_online_cpu(mask);
-
- /* On any allowed CPU? */
- if (dest_cpu >= nr_cpu_ids)
- dest_cpu = any_online_cpu(p->cpus_allowed);
-
- /* No more Mr. Nice Guy. */
- if (dest_cpu >= nr_cpu_ids) {
- cpumask_t cpus_allowed;
-
- cpuset_cpus_allowed_locked(p, &cpus_allowed);
- /*
- * Try to stay on the same cpuset, where the
- * current cpuset may be a subset of all cpus.
- * The cpuset_cpus_allowed_locked() variant of
- * cpuset_cpus_allowed() will not block. It must be
- * called within calls to cpuset_lock/cpuset_unlock.
- */
- rq = task_rq_lock(p, &flags);
- p->cpus_allowed = cpus_allowed;
- dest_cpu = any_online_cpu(p->cpus_allowed);
- task_rq_unlock(rq, &flags);
-
- /*
- * Don't tell them about moving exiting tasks or
- * kernel threads (both mm NULL), since they never
- * leave kernel.
- */
- if (p->mm && printk_ratelimit()) {
- printk(KERN_INFO "process %d (%s) no "
- "longer affine to cpu%d\n",
- task_pid_nr(p), p->comm, dead_cpu);
- }
+ /*
+ * Don't tell them about moving exiting tasks or
+ * kernel threads (both mm NULL), since they never
+ * leave kernel.
+ */
+ if (p->mm && printk_ratelimit()) {
+ printk(KERN_INFO "process %d (%s) no "
+ "longer affine to cpu%d\n",
+ task_pid_nr(p), p->comm, dead_cpu);
}
- } while (!__migrate_task_irq(p, dead_cpu, dest_cpu));
+ }
+
+move:
+ /* It can have affinity changed while we were choosing. */
+ if (unlikely(!__migrate_task_irq(p, dead_cpu, dest_cpu)))
+ goto again;
}
/*
@@ -6153,7 +6173,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
*/
static void migrate_nr_uninterruptible(struct rq *rq_src)
{
- struct rq *rq_dest = cpu_rq(any_online_cpu(*CPU_MASK_ALL_PTR));
+ struct rq *rq_dest = cpu_rq(cpumask_any(cpu_online_mask));
unsigned long flags;
local_irq_save(flags);
@@ -6443,7 +6463,7 @@ static void set_rq_online(struct rq *rq)
if (!rq->online) {
const struct sched_class *class;
- cpu_set(rq->cpu, rq->rd->online);
+ cpumask_set_cpu(rq->cpu, rq->rd->online);
rq->online = 1;
for_each_class(class) {
@@ -6463,7 +6483,7 @@ static void set_rq_offline(struct rq *rq)
class->rq_offline(rq);
}
- cpu_clear(rq->cpu, rq->rd->online);
+ cpumask_clear_cpu(rq->cpu, rq->rd->online);
rq->online = 0;
}
}
@@ -6504,7 +6524,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void
*hcpu)
rq = cpu_rq(cpu);
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
- BUG_ON(!cpu_isset(cpu, rq->rd->span));
+ BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_online(rq);
}
@@ -6518,7 +6538,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void
*hcpu)
break;
/* Unbind it from offline cpu so it can run. Fall thru. */
kthread_bind(cpu_rq(cpu)->migration_thread,
- any_online_cpu(cpu_online_map));
+ cpumask_any(cpu_online_mask));
kthread_stop(cpu_rq(cpu)->migration_thread);
cpu_rq(cpu)->migration_thread = NULL;
break;
@@ -6566,7 +6586,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void
*hcpu)
rq = cpu_rq(cpu);
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
- BUG_ON(!cpu_isset(cpu, rq->rd->span));
+ BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_offline(rq);
}
spin_unlock_irqrestore(&rq->lock, flags);
@@ -6605,13 +6625,13 @@ early_initcall(migration_init);
#ifdef CONFIG_SCHED_DEBUG
static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
- cpumask_t *groupmask)
+ struct cpumask *groupmask)
{
struct sched_group *group = sd->groups;
char str[256];
- cpulist_scnprintf(str, sizeof(str), sd->span);
- cpus_clear(*groupmask);
+ cpulist_scnprintf(str, sizeof(str), *sched_domain_span(sd));
+ cpumask_clear(groupmask);
printk(KERN_DEBUG "%*s domain %d: ", level, "", level);
@@ -6625,11 +6645,11 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu,
int level,
printk(KERN_CONT "span %s level %s\n", str, sd->name);
- if (!cpu_isset(cpu, sd->span)) {
+ if (!cpumask_test_cpu(cpu, sched_domain_span(sd))) {
printk(KERN_ERR "ERROR: domain->span does not contain "
"CPU%d\n", cpu);
}
- if (!cpu_isset(cpu, group->cpumask)) {
+ if (!cpumask_test_cpu(cpu, sched_group_cpus(group))) {
printk(KERN_ERR "ERROR: domain->groups does not contain"
" CPU%d\n", cpu);
}
@@ -6649,31 +6669,32 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu,
int level,
break;
}
- if (!cpus_weight(group->cpumask)) {
+ if (!cpumask_weight(sched_group_cpus(group))) {
printk(KERN_CONT "\n");
printk(KERN_ERR "ERROR: empty group\n");
break;
}
- if (cpus_intersects(*groupmask, group->cpumask)) {
+ if (cpumask_intersects(groupmask, sched_group_cpus(group))) {
printk(KERN_CONT "\n");
printk(KERN_ERR "ERROR: repeated CPUs\n");
break;
}
- cpus_or(*groupmask, *groupmask, group->cpumask);
+ cpumask_or(groupmask, groupmask, sched_group_cpus(group));
- cpulist_scnprintf(str, sizeof(str), group->cpumask);
+ cpulist_scnprintf(str, sizeof(str), *sched_group_cpus(group));
printk(KERN_CONT " %s", str);
group = group->next;
} while (group != sd->groups);
printk(KERN_CONT "\n");
- if (!cpus_equal(sd->span, *groupmask))
+ if (!cpumask_equal(sched_domain_span(sd), groupmask))
printk(KERN_ERR "ERROR: groups don't span domain->span\n");
- if (sd->parent && !cpus_subset(*groupmask, sd->parent->span))
+ if (sd->parent &&
+ !cpumask_subset(groupmask, sched_domain_span(sd->parent)))
printk(KERN_ERR "ERROR: parent span is not a superset "
"of domain->span\n");
return 0;
@@ -6681,7 +6702,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int
level,
static void sched_domain_debug(struct sched_domain *sd, int cpu)
{
- cpumask_t *groupmask;
+ cpumask_var_t groupmask;
int level = 0;
if (!sd) {
@@ -6691,8 +6712,7 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
printk(KERN_DEBUG "CPU%d attaching sched-domain:\n", cpu);
- groupmask = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
- if (!groupmask) {
+ if (!alloc_cpumask_var(&groupmask, GFP_KERNEL)) {
printk(KERN_DEBUG "Cannot load-balance (out of memory)\n");
return;
}
@@ -6705,7 +6725,7 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
if (!sd)
break;
}
- kfree(groupmask);
+ free_cpumask_var(groupmask);
}
#else /* !CONFIG_SCHED_DEBUG */
# define sched_domain_debug(sd, cpu) do { } while (0)
@@ -6713,7 +6733,7 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
static int sd_degenerate(struct sched_domain *sd)
{
- if (cpus_weight(sd->span) == 1)
+ if (cpumask_weight(sched_domain_span(sd)) == 1)
return 1;
/* Following flags need at least 2 groups */
@@ -6744,7 +6764,7 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain
*parent)
if (sd_degenerate(parent))
return 1;
- if (!cpus_equal(sd->span, parent->span))
+ if (!cpumask_equal(sched_domain_span(sd), sched_domain_span(parent)))
return 0;
/* Does parent contain flags not in child? */
@@ -6766,6 +6786,16 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain
*parent)
return 1;
}
+static void free_rootdomain(struct root_domain *rd)
+{
+ cpupri_cleanup(&rd->cpupri);
+
+ free_cpumask_var(rd->rto_mask);
+ free_cpumask_var(rd->online);
+ free_cpumask_var(rd->span);
+ kfree(rd);
+}
+
static void rq_attach_root(struct rq *rq, struct root_domain *rd)
{
unsigned long flags;
@@ -6775,38 +6805,63 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
if (rq->rd) {
struct root_domain *old_rd = rq->rd;
- if (cpu_isset(rq->cpu, old_rd->online))
+ if (cpumask_test_cpu(rq->cpu, old_rd->online))
set_rq_offline(rq);
- cpu_clear(rq->cpu, old_rd->span);
+ cpumask_clear_cpu(rq->cpu, old_rd->span);
if (atomic_dec_and_test(&old_rd->refcount))
- kfree(old_rd);
+ free_rootdomain(old_rd);
}
atomic_inc(&rd->refcount);
rq->rd = rd;
- cpu_set(rq->cpu, rd->span);
- if (cpu_isset(rq->cpu, cpu_online_map))
+ cpumask_set_cpu(rq->cpu, rd->span);
+ if (cpumask_test_cpu(rq->cpu, cpu_online_mask))
set_rq_online(rq);
spin_unlock_irqrestore(&rq->lock, flags);
}
-static void init_rootdomain(struct root_domain *rd)
+static int init_rootdomain(struct root_domain *rd, bool bootmem)
{
memset(rd, 0, sizeof(*rd));
- cpus_clear(rd->span);
- cpus_clear(rd->online);
+ if (bootmem) {
+ alloc_bootmem_cpumask_var(&def_root_domain.span);
+ alloc_bootmem_cpumask_var(&def_root_domain.online);
+ alloc_bootmem_cpumask_var(&def_root_domain.rto_mask);
+ cpupri_init(&rd->cpupri, true);
+ return 0;
+ }
+
+ if (!alloc_cpumask_var(&rd->span, GFP_KERNEL))
+ goto free_rd;
+ if (!alloc_cpumask_var(&rd->online, GFP_KERNEL))
+ goto free_span;
+ if (!alloc_cpumask_var(&rd->rto_mask, GFP_KERNEL))
+ goto free_online;
+
+ if (cpupri_init(&rd->cpupri, false) != 0)
+ goto free_rto_mask;
+ return 0;
- cpupri_init(&rd->cpupri);
+free_rto_mask:
+ free_cpumask_var(rd->rto_mask);
+free_online:
+ free_cpumask_var(rd->online);
+free_span:
+ free_cpumask_var(rd->span);
+free_rd:
+ kfree(rd);
+ return -ENOMEM;
}
static void init_defrootdomain(void)
{
- init_rootdomain(&def_root_domain);
+ init_rootdomain(&def_root_domain, true);
+
atomic_set(&def_root_domain.refcount, 1);
}
@@ -6818,7 +6873,10 @@ static struct root_domain *alloc_rootdomain(void)
if (!rd)
return NULL;
- init_rootdomain(rd);
+ if (init_rootdomain(rd, false) != 0) {
+ kfree(rd);
+ return NULL;
+ }
return rd;
}
@@ -6860,19 +6918,12 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd,
int cpu)
}
/* cpus with isolated domains */
-static cpumask_t cpu_isolated_map = CPU_MASK_NONE;
+static cpumask_var_t cpu_isolated_map;
/* Setup the mask of cpus configured for isolated domains */
static int __init isolated_cpu_setup(char *str)
{
- static int __initdata ints[NR_CPUS];
- int i;
-
- str = get_options(str, ARRAY_SIZE(ints), ints);
- cpus_clear(cpu_isolated_map);
- for (i = 1; i <= ints[0]; i++)
- if (ints[i] < NR_CPUS)
- cpu_set(ints[i], cpu_isolated_map);
+ cpulist_parse(str, *cpu_isolated_map);
return 1;
}
@@ -6881,42 +6932,43 @@ __setup("isolcpus=", isolated_cpu_setup);
/*
* init_sched_build_groups takes the cpumask we wish to span, and a pointer
* to a function which identifies what group(along with sched group) a CPU
- * belongs to. The return value of group_fn must be a >= 0 and < NR_CPUS
- * (due to the fact that we keep track of groups covered with a cpumask_t).
+ * belongs to. The return value of group_fn must be a >= 0 and < nr_cpu_ids
+ * (due to the fact that we keep track of groups covered with a struct cpumask).
*
* init_sched_build_groups will build a circular linked list of the groups
* covered by the given span, and will set each group's ->cpumask correctly,
* and ->cpu_power to 0.
*/
static void
-init_sched_build_groups(const cpumask_t *span, const cpumask_t *cpu_map,
- int (*group_fn)(int cpu, const cpumask_t *cpu_map,
+init_sched_build_groups(const struct cpumask *span,
+ const struct cpumask *cpu_map,
+ int (*group_fn)(int cpu, const struct cpumask *cpu_map,
struct sched_group **sg,
- cpumask_t *tmpmask),
- cpumask_t *covered, cpumask_t *tmpmask)
+ struct cpumask *tmpmask),
+ struct cpumask *covered, struct cpumask *tmpmask)
{
struct sched_group *first = NULL, *last = NULL;
int i;
- cpus_clear(*covered);
+ cpumask_clear(covered);
- for_each_cpu_mask_nr(i, *span) {
+ for_each_cpu(i, span) {
struct sched_group *sg;
int group = group_fn(i, cpu_map, &sg, tmpmask);
int j;
- if (cpu_isset(i, *covered))
+ if (cpumask_test_cpu(i, covered))
continue;
- cpus_clear(sg->cpumask);
+ cpumask_clear(sched_group_cpus(sg));
sg->__cpu_power = 0;
- for_each_cpu_mask_nr(j, *span) {
+ for_each_cpu(j, span) {
if (group_fn(j, cpu_map, NULL, tmpmask) != group)
continue;
- cpu_set(j, *covered);
- cpu_set(j, sg->cpumask);
+ cpumask_set_cpu(j, covered);
+ cpumask_set_cpu(j, sched_group_cpus(sg));
}
if (!first)
first = sg;
@@ -6980,9 +7032,10 @@ static int find_next_best_node(int node, nodemask_t *used_nodes)
* should be one that prevents unnecessary balancing, but also spreads tasks
* out optimally.
*/
-static void sched_domain_node_span(int node, cpumask_t *span)
+static void sched_domain_node_span(int node, struct cpumask *span)
{
nodemask_t used_nodes;
+ /* FIXME: use cpumask_of_node() */
node_to_cpumask_ptr(nodemask, node);
int i;
@@ -7004,18 +7057,33 @@ static void sched_domain_node_span(int node, cpumask_t *span)
int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
/*
+ * The cpus mask in sched_group and sched_domain hangs off the end.
+ * FIXME: use cpumask_var_t or dynamic percpu alloc to avoid wasting space
+ * for nr_cpu_ids < CONFIG_NR_CPUS.
+ */
+struct static_sched_group {
+ struct sched_group sg;
+ DECLARE_BITMAP(cpus, CONFIG_NR_CPUS);
+};
+
+struct static_sched_domain {
+ struct sched_domain sd;
+ DECLARE_BITMAP(span, CONFIG_NR_CPUS);
+};
+
+/*
* SMT sched-domains:
*/
#ifdef CONFIG_SCHED_SMT
-static DEFINE_PER_CPU(struct sched_domain, cpu_domains);
-static DEFINE_PER_CPU(struct sched_group, sched_group_cpus);
+static DEFINE_PER_CPU(struct static_sched_domain, cpu_domains);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_cpus);
static int
-cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
- cpumask_t *unused)
+cpu_to_cpu_group(int cpu, const struct cpumask *cpu_map,
+ struct sched_group **sg, struct cpumask *unused)
{
if (sg)
- *sg = &per_cpu(sched_group_cpus, cpu);
+ *sg = &per_cpu(sched_group_cpus, cpu).sg;
return cpu;
}
#endif /* CONFIG_SCHED_SMT */
@@ -7024,56 +7092,55 @@ cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct
sched_group **sg,
* multi-core sched-domains:
*/
#ifdef CONFIG_SCHED_MC
-static DEFINE_PER_CPU(struct sched_domain, core_domains);
-static DEFINE_PER_CPU(struct sched_group, sched_group_core);
+static DEFINE_PER_CPU(struct static_sched_domain, core_domains);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_core);
#endif /* CONFIG_SCHED_MC */
#if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
static int
-cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
- cpumask_t *mask)
+cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
+ struct sched_group **sg, struct cpumask *mask)
{
int group;
- *mask = per_cpu(cpu_sibling_map, cpu);
- cpus_and(*mask, *mask, *cpu_map);
- group = first_cpu(*mask);
+ cpumask_and(mask, &per_cpu(cpu_sibling_map, cpu), cpu_map);
+ group = cpumask_first(mask);
if (sg)
- *sg = &per_cpu(sched_group_core, group);
+ *sg = &per_cpu(sched_group_core, group).sg;
return group;
}
#elif defined(CONFIG_SCHED_MC)
static int
-cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
- cpumask_t *unused)
+cpu_to_core_group(int cpu, const struct cpumask *cpu_map,
+ struct sched_group **sg, struct cpumask *unused)
{
if (sg)
- *sg = &per_cpu(sched_group_core, cpu);
+ *sg = &per_cpu(sched_group_core, cpu).sg;
return cpu;
}
#endif
-static DEFINE_PER_CPU(struct sched_domain, phys_domains);
-static DEFINE_PER_CPU(struct sched_group, sched_group_phys);
+static DEFINE_PER_CPU(struct static_sched_domain, phys_domains);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_phys);
static int
-cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
- cpumask_t *mask)
+cpu_to_phys_group(int cpu, const struct cpumask *cpu_map,
+ struct sched_group **sg, struct cpumask *mask)
{
int group;
#ifdef CONFIG_SCHED_MC
+ /* FIXME: Use cpu_coregroup_mask. */
*mask = cpu_coregroup_map(cpu);
cpus_and(*mask, *mask, *cpu_map);
- group = first_cpu(*mask);
+ group = cpumask_first(mask);
#elif defined(CONFIG_SCHED_SMT)
- *mask = per_cpu(cpu_sibling_map, cpu);
- cpus_and(*mask, *mask, *cpu_map);
- group = first_cpu(*mask);
+ cpumask_and(mask, &per_cpu(cpu_sibling_map, cpu), cpu_map);
+ group = cpumask_first(mask);
#else
group = cpu;
#endif
if (sg)
- *sg = &per_cpu(sched_group_phys, group);
+ *sg = &per_cpu(sched_group_phys, group).sg;
return group;
}
@@ -7087,19 +7154,21 @@ static DEFINE_PER_CPU(struct sched_domain, node_domains);
static struct sched_group ***sched_group_nodes_bycpu;
static DEFINE_PER_CPU(struct sched_domain, allnodes_domains);
-static DEFINE_PER_CPU(struct sched_group, sched_group_allnodes);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_allnodes);
-static int cpu_to_allnodes_group(int cpu, const cpumask_t *cpu_map,
- struct sched_group **sg, cpumask_t *nodemask)
+static int cpu_to_allnodes_group(int cpu, const struct cpumask *cpu_map,
+ struct sched_group **sg,
+ struct cpumask *nodemask)
{
int group;
+ /* FIXME: use cpumask_of_node */
+ node_to_cpumask_ptr(pnodemask, cpu_to_node(cpu));
- *nodemask = node_to_cpumask(cpu_to_node(cpu));
- cpus_and(*nodemask, *nodemask, *cpu_map);
- group = first_cpu(*nodemask);
+ cpumask_and(nodemask, pnodemask, cpu_map);
+ group = cpumask_first(nodemask);
if (sg)
- *sg = &per_cpu(sched_group_allnodes, group);
+ *sg = &per_cpu(sched_group_allnodes, group).sg;
return group;
}
@@ -7111,11 +7180,11 @@ static void init_numa_sched_groups_power(struct sched_group
*group_head)
if (!sg)
return;
do {
- for_each_cpu_mask_nr(j, sg->cpumask) {
+ for_each_cpu(j, sched_group_cpus(sg)) {
struct sched_domain *sd;
- sd = &per_cpu(phys_domains, j);
- if (j != first_cpu(sd->groups->cpumask)) {
+ sd = &per_cpu(phys_domains, j).sd;
+ if (j != cpumask_first(sched_group_cpus(sd->groups))) {
/*
* Only add "power" once for each
* physical package.
@@ -7132,11 +7201,12 @@ static void init_numa_sched_groups_power(struct sched_group
*group_head)
#ifdef CONFIG_NUMA
/* Free memory allocated for various sched_group structures */
-static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t *nodemask)
+static void free_sched_groups(const struct cpumask *cpu_map,
+ struct cpumask *nodemask)
{
int cpu, i;
- for_each_cpu_mask_nr(cpu, *cpu_map) {
+ for_each_cpu(cpu, cpu_map) {
struct sched_group **sched_group_nodes
= sched_group_nodes_bycpu[cpu];
@@ -7145,10 +7215,11 @@ static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t
*nodemask)
for (i = 0; i < nr_node_ids; i++) {
struct sched_group *oldsg, *sg = sched_group_nodes[i];
+ /* FIXME: Use cpumask_of_node */
+ node_to_cpumask_ptr(pnodemask, i);
- *nodemask = node_to_cpumask(i);
- cpus_and(*nodemask, *nodemask, *cpu_map);
- if (cpus_empty(*nodemask))
+ cpus_and(*nodemask, *pnodemask, *cpu_map);
+ if (cpumask_empty(nodemask))
continue;
if (sg == NULL)
@@ -7166,7 +7237,8 @@ next_sg:
}
}
#else /* !CONFIG_NUMA */
-static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t *nodemask)
+static void free_sched_groups(const struct cpumask *cpu_map,
+ struct cpumask *nodemask)
{
}
#endif /* CONFIG_NUMA */
@@ -7192,7 +7264,7 @@ static void init_sched_groups_power(int cpu, struct sched_domain *sd)
WARN_ON(!sd || !sd->groups);
- if (cpu != first_cpu(sd->groups->cpumask))
+ if (cpu != cpumask_first(sched_group_cpus(sd->groups)))
return;
child = sd->child;
@@ -7257,48 +7329,6 @@ SD_INIT_FUNC(CPU)
SD_INIT_FUNC(MC)
#endif
-/*
- * To minimize stack usage kmalloc room for cpumasks and share the
- * space as the usage in build_sched_domains() dictates. Used only
- * if the amount of space is significant.
- */
-struct allmasks {
- cpumask_t tmpmask; /* make this one first */
- union {
- cpumask_t nodemask;
- cpumask_t this_sibling_map;
- cpumask_t this_core_map;
- };
- cpumask_t send_covered;
-
-#ifdef CONFIG_NUMA
- cpumask_t domainspan;
- cpumask_t covered;
- cpumask_t notcovered;
-#endif
-};
-
-#if NR_CPUS > 128
-#define SCHED_CPUMASK_DECLARE(v) struct allmasks *v
-static inline void sched_cpumask_alloc(struct allmasks **masks)
-{
- *masks = kmalloc(sizeof(**masks), GFP_KERNEL);
-}
-static inline void sched_cpumask_free(struct allmasks *masks)
-{
- kfree(masks);
-}
-#else
-#define SCHED_CPUMASK_DECLARE(v) struct allmasks _v, *v = &_v
-static inline void sched_cpumask_alloc(struct allmasks **masks)
-{ }
-static inline void sched_cpumask_free(struct allmasks *masks)
-{ }
-#endif
-
-#define SCHED_CPUMASK_VAR(v, a) cpumask_t *v = (cpumask_t *) \
- ((unsigned long)(a) + offsetof(struct allmasks, v))
-
static int default_relax_domain_level = -1;
static int __init setup_relax_domain_level(char *str)
@@ -7338,17 +7368,38 @@ static void set_domain_attribute(struct sched_domain *sd,
* Build sched domains for a given set of cpus and attach the sched domains
* to the individual cpus
*/
-static int __build_sched_domains(const cpumask_t *cpu_map,
+static int __build_sched_domains(const struct cpumask *cpu_map,
struct sched_domain_attr *attr)
{
- int i;
+ int i, err = -ENOMEM;
struct root_domain *rd;
- SCHED_CPUMASK_DECLARE(allmasks);
- cpumask_t *tmpmask;
+ cpumask_var_t nodemask, this_sibling_map, this_core_map, send_covered,
+ tmpmask;
#ifdef CONFIG_NUMA
+ cpumask_var_t domainspan, covered, notcovered;
struct sched_group **sched_group_nodes = NULL;
int sd_allnodes = 0;
+ if (!alloc_cpumask_var(&domainspan, GFP_KERNEL))
+ goto out;
+ if (!alloc_cpumask_var(&covered, GFP_KERNEL))
+ goto free_domainspan;
+ if (!alloc_cpumask_var(¬covered, GFP_KERNEL))
+ goto free_covered;
+#endif
+
+ if (!alloc_cpumask_var(&nodemask, GFP_KERNEL))
+ goto free_notcovered;
+ if (!alloc_cpumask_var(&this_sibling_map, GFP_KERNEL))
+ goto free_nodemask;
+ if (!alloc_cpumask_var(&this_core_map, GFP_KERNEL))
+ goto free_this_sibling_map;
+ if (!alloc_cpumask_var(&send_covered, GFP_KERNEL))
+ goto free_this_core_map;
+ if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL))
+ goto free_send_covered;
+
+#ifdef CONFIG_NUMA
/*
* Allocate the per-node list of sched groups
*/
@@ -7356,54 +7407,37 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
GFP_KERNEL);
if (!sched_group_nodes) {
printk(KERN_WARNING "Can not alloc sched group node list\n");
- return -ENOMEM;
+ goto free_tmpmask;
}
#endif
rd = alloc_rootdomain();
if (!rd) {
printk(KERN_WARNING "Cannot alloc root domain\n");
-#ifdef CONFIG_NUMA
- kfree(sched_group_nodes);
-#endif
- return -ENOMEM;
+ goto free_sched_groups;
}
- /* get space for all scratch cpumask variables */
- sched_cpumask_alloc(&allmasks);
- if (!allmasks) {
- printk(KERN_WARNING "Cannot alloc cpumask array\n");
- kfree(rd);
#ifdef CONFIG_NUMA
- kfree(sched_group_nodes);
-#endif
- return -ENOMEM;
- }
-
- tmpmask = (cpumask_t *)allmasks;
-
-
-#ifdef CONFIG_NUMA
- sched_group_nodes_bycpu[first_cpu(*cpu_map)] = sched_group_nodes;
+ sched_group_nodes_bycpu[cpumask_first(cpu_map)] = sched_group_nodes;
#endif
/*
* Set up domains for cpus specified by the cpu_map.
*/
- for_each_cpu_mask_nr(i, *cpu_map) {
+ for_each_cpu(i, cpu_map) {
struct sched_domain *sd = NULL, *p;
- SCHED_CPUMASK_VAR(nodemask, allmasks);
+ /* FIXME: use cpumask_of_node */
*nodemask = node_to_cpumask(cpu_to_node(i));
cpus_and(*nodemask, *nodemask, *cpu_map);
#ifdef CONFIG_NUMA
- if (cpus_weight(*cpu_map) >
- SD_NODES_PER_DOMAIN*cpus_weight(*nodemask)) {
+ if (cpumask_weight(cpu_map) >
+ SD_NODES_PER_DOMAIN*cpumask_weight(nodemask)) {
sd = &per_cpu(allnodes_domains, i);
SD_INIT(sd, ALLNODES);
set_domain_attribute(sd, attr);
- sd->span = *cpu_map;
+ cpumask_copy(sched_domain_span(sd), cpu_map);
cpu_to_allnodes_group(i, cpu_map, &sd->groups, tmpmask);
p = sd;
sd_allnodes = 1;
@@ -7413,18 +7447,19 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
sd = &per_cpu(node_domains, i);
SD_INIT(sd, NODE);
set_domain_attribute(sd, attr);
- sched_domain_node_span(cpu_to_node(i), &sd->span);
+ sched_domain_node_span(cpu_to_node(i), sched_domain_span(sd));
sd->parent = p;
if (p)
p->child = sd;
- cpus_and(sd->span, sd->span, *cpu_map);
+ cpumask_and(sched_domain_span(sd),
+ sched_domain_span(sd), cpu_map);
#endif
p = sd;
- sd = &per_cpu(phys_domains, i);
+ sd = &per_cpu(phys_domains, i).sd;
SD_INIT(sd, CPU);
set_domain_attribute(sd, attr);
- sd->span = *nodemask;
+ cpumask_copy(sched_domain_span(sd), nodemask);
sd->parent = p;
if (p)
p->child = sd;
@@ -7432,11 +7467,12 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
#ifdef CONFIG_SCHED_MC
p = sd;
- sd = &per_cpu(core_domains, i);
+ sd = &per_cpu(core_domains, i).sd;
SD_INIT(sd, MC);
set_domain_attribute(sd, attr);
- sd->span = cpu_coregroup_map(i);
- cpus_and(sd->span, sd->span, *cpu_map);
+ *sched_domain_span(sd) = cpu_coregroup_map(i);
+ cpumask_and(sched_domain_span(sd),
+ sched_domain_span(sd), cpu_map);
sd->parent = p;
p->child = sd;
cpu_to_core_group(i, cpu_map, &sd->groups, tmpmask);
@@ -7444,11 +7480,11 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
#ifdef CONFIG_SCHED_SMT
p = sd;
- sd = &per_cpu(cpu_domains, i);
+ sd = &per_cpu(cpu_domains, i).sd;
SD_INIT(sd, SIBLING);
set_domain_attribute(sd, attr);
- sd->span = per_cpu(cpu_sibling_map, i);
- cpus_and(sd->span, sd->span, *cpu_map);
+ cpumask_and(sched_domain_span(sd),
+ &per_cpu(cpu_sibling_map, i), cpu_map);
sd->parent = p;
p->child = sd;
cpu_to_cpu_group(i, cpu_map, &sd->groups, tmpmask);
@@ -7457,13 +7493,10 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
#ifdef CONFIG_SCHED_SMT
/* Set up CPU (sibling) groups */
- for_each_cpu_mask_nr(i, *cpu_map) {
- SCHED_CPUMASK_VAR(this_sibling_map, allmasks);
- SCHED_CPUMASK_VAR(send_covered, allmasks);
-
- *this_sibling_map = per_cpu(cpu_sibling_map, i);
- cpus_and(*this_sibling_map, *this_sibling_map, *cpu_map);
- if (i != first_cpu(*this_sibling_map))
+ for_each_cpu(i, cpu_map) {
+ cpumask_and(this_sibling_map,
+ &per_cpu(cpu_sibling_map, i), cpu_map);
+ if (i != cpumask_first(this_sibling_map))
continue;
init_sched_build_groups(this_sibling_map, cpu_map,
@@ -7474,13 +7507,11 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
#ifdef CONFIG_SCHED_MC
/* Set up multi-core groups */
- for_each_cpu_mask_nr(i, *cpu_map) {
- SCHED_CPUMASK_VAR(this_core_map, allmasks);
- SCHED_CPUMASK_VAR(send_covered, allmasks);
-
+ for_each_cpu(i, cpu_map) {
+ /* FIXME: Use cpu_coregroup_mask */
*this_core_map = cpu_coregroup_map(i);
cpus_and(*this_core_map, *this_core_map, *cpu_map);
- if (i != first_cpu(*this_core_map))
+ if (i != cpumask_first(this_core_map))
continue;
init_sched_build_groups(this_core_map, cpu_map,
@@ -7491,12 +7522,10 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
/* Set up physical groups */
for (i = 0; i < nr_node_ids; i++) {
- SCHED_CPUMASK_VAR(nodemask, allmasks);
- SCHED_CPUMASK_VAR(send_covered, allmasks);
-
+ /* FIXME: Use cpumask_of_node */
*nodemask = node_to_cpumask(i);
cpus_and(*nodemask, *nodemask, *cpu_map);
- if (cpus_empty(*nodemask))
+ if (cpumask_empty(nodemask))
continue;
init_sched_build_groups(nodemask, cpu_map,
@@ -7507,8 +7536,6 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
#ifdef CONFIG_NUMA
/* Set up node groups */
if (sd_allnodes) {
- SCHED_CPUMASK_VAR(send_covered, allmasks);
-
init_sched_build_groups(cpu_map, cpu_map,
&cpu_to_allnodes_group,
send_covered, tmpmask);
@@ -7517,58 +7544,58 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
for (i = 0; i < nr_node_ids; i++) {
/* Set up node groups */
struct sched_group *sg, *prev;
- SCHED_CPUMASK_VAR(nodemask, allmasks);
- SCHED_CPUMASK_VAR(domainspan, allmasks);
- SCHED_CPUMASK_VAR(covered, allmasks);
int j;
+ /* FIXME: Use cpumask_of_node */
*nodemask = node_to_cpumask(i);
- cpus_clear(*covered);
+ cpumask_clear(covered);
cpus_and(*nodemask, *nodemask, *cpu_map);
- if (cpus_empty(*nodemask)) {
+ if (cpumask_empty(nodemask)) {
sched_group_nodes[i] = NULL;
continue;
}
sched_domain_node_span(i, domainspan);
- cpus_and(*domainspan, *domainspan, *cpu_map);
+ cpumask_and(domainspan, domainspan, cpu_map);
- sg = kmalloc_node(sizeof(struct sched_group), GFP_KERNEL, i);
+ sg = kmalloc_node(sizeof(struct sched_group) + cpumask_size(),
+ GFP_KERNEL, i);
if (!sg) {
printk(KERN_WARNING "Can not alloc domain group for "
"node %d\n", i);
goto error;
}
sched_group_nodes[i] = sg;
- for_each_cpu_mask_nr(j, *nodemask) {
+ for_each_cpu(j, nodemask) {
struct sched_domain *sd;
sd = &per_cpu(node_domains, j);
sd->groups = sg;
}
sg->__cpu_power = 0;
- sg->cpumask = *nodemask;
+ cpumask_copy(sched_group_cpus(sg), nodemask);
sg->next = sg;
- cpus_or(*covered, *covered, *nodemask);
+ cpumask_or(covered, covered, nodemask);
prev = sg;
for (j = 0; j < nr_node_ids; j++) {
- SCHED_CPUMASK_VAR(notcovered, allmasks);
int n = (i + j) % nr_node_ids;
+ /* FIXME: Use cpumask_of_node */
node_to_cpumask_ptr(pnodemask, n);
- cpus_complement(*notcovered, *covered);
- cpus_and(*tmpmask, *notcovered, *cpu_map);
- cpus_and(*tmpmask, *tmpmask, *domainspan);
- if (cpus_empty(*tmpmask))
+ cpumask_complement(notcovered, covered);
+ cpumask_and(tmpmask, notcovered, cpu_map);
+ cpumask_and(tmpmask, tmpmask, domainspan);
+ if (cpumask_empty(tmpmask))
break;
- cpus_and(*tmpmask, *tmpmask, *pnodemask);
- if (cpus_empty(*tmpmask))
+ cpumask_and(tmpmask, tmpmask, pnodemask);
+ if (cpumask_empty(tmpmask))
continue;
- sg = kmalloc_node(sizeof(struct sched_group),
+ sg = kmalloc_node(sizeof(struct sched_group) +
+ cpumask_size(),
GFP_KERNEL, i);
if (!sg) {
printk(KERN_WARNING
@@ -7576,9 +7603,9 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
goto error;
}
sg->__cpu_power = 0;
- sg->cpumask = *tmpmask;
+ cpumask_copy(sched_group_cpus(sg), tmpmask);
sg->next = prev->next;
- cpus_or(*covered, *covered, *tmpmask);
+ cpumask_or(covered, covered, tmpmask);
prev->next = sg;
prev = sg;
}
@@ -7587,22 +7614,22 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
/* Calculate CPU power for physical packages and nodes */
#ifdef CONFIG_SCHED_SMT
- for_each_cpu_mask_nr(i, *cpu_map) {
- struct sched_domain *sd = &per_cpu(cpu_domains, i);
+ for_each_cpu(i, cpu_map) {
+ struct sched_domain *sd = &per_cpu(cpu_domains, i).sd;
init_sched_groups_power(i, sd);
}
#endif
#ifdef CONFIG_SCHED_MC
- for_each_cpu_mask_nr(i, *cpu_map) {
- struct sched_domain *sd = &per_cpu(core_domains, i);
+ for_each_cpu(i, cpu_map) {
+ struct sched_domain *sd = &per_cpu(core_domains, i).sd;
init_sched_groups_power(i, sd);
}
#endif
- for_each_cpu_mask_nr(i, *cpu_map) {
- struct sched_domain *sd = &per_cpu(phys_domains, i);
+ for_each_cpu(i, cpu_map) {
+ struct sched_domain *sd = &per_cpu(phys_domains, i).sd;
init_sched_groups_power(i, sd);
}
@@ -7614,53 +7641,78 @@ static int __build_sched_domains(const cpumask_t *cpu_map,
if (sd_allnodes) {
struct sched_group *sg;
- cpu_to_allnodes_group(first_cpu(*cpu_map), cpu_map, &sg,
+ cpu_to_allnodes_group(cpumask_first(cpu_map), cpu_map, &sg,
tmpmask);
init_numa_sched_groups_power(sg);
}
#endif
/* Attach the domains */
- for_each_cpu_mask_nr(i, *cpu_map) {
+ for_each_cpu(i, cpu_map) {
struct sched_domain *sd;
#ifdef CONFIG_SCHED_SMT
- sd = &per_cpu(cpu_domains, i);
+ sd = &per_cpu(cpu_domains, i).sd;
#elif defined(CONFIG_SCHED_MC)
- sd = &per_cpu(core_domains, i);
+ sd = &per_cpu(core_domains, i).sd;
#else
- sd = &per_cpu(phys_domains, i);
+ sd = &per_cpu(phys_domains, i).sd;
#endif
cpu_attach_domain(sd, rd, i);
}
- sched_cpumask_free(allmasks);
- return 0;
+ err = 0;
+
+free_tmpmask:
+ free_cpumask_var(tmpmask);
+free_send_covered:
+ free_cpumask_var(send_covered);
+free_this_core_map:
+ free_cpumask_var(this_core_map);
+free_this_sibling_map:
+ free_cpumask_var(this_sibling_map);
+free_nodemask:
+ free_cpumask_var(nodemask);
+free_notcovered:
+#ifdef CONFIG_NUMA
+ free_cpumask_var(notcovered);
+free_covered:
+ free_cpumask_var(covered);
+free_domainspan:
+ free_cpumask_var(domainspan);
+out:
+#endif
+ return err;
+
+free_sched_groups:
+#ifdef CONFIG_NUMA
+ kfree(sched_group_nodes);
+#endif
+ goto free_tmpmask;
#ifdef CONFIG_NUMA
error:
free_sched_groups(cpu_map, tmpmask);
- sched_cpumask_free(allmasks);
- kfree(rd);
- return -ENOMEM;
+ free_rootdomain(rd);
+ goto free_tmpmask;
#endif
}
-static int build_sched_domains(const cpumask_t *cpu_map)
+static int build_sched_domains(const struct cpumask *cpu_map)
{
return __build_sched_domains(cpu_map, NULL);
}
-static cpumask_t *doms_cur; /* current sched domains */
+static struct cpumask *doms_cur; /* current sched domains */
static int ndoms_cur; /* number of sched domains in 'doms_cur' */
static struct sched_domain_attr *dattr_cur;
/* attribues of custom domains in 'doms_cur' */
/*
* Special case: If a kmalloc of a doms_cur partition (array of
- * cpumask_t) fails, then fallback to a single sched domain,
- * as determined by the single cpumask_t fallback_doms.
+ * cpumask) fails, then fallback to a single sched domain,
+ * as determined by the single cpumask fallback_doms.
*/
-static cpumask_t fallback_doms;
+static cpumask_var_t fallback_doms;
void __attribute__((weak)) arch_update_cpu_topology(void)
{
@@ -7671,16 +7723,16 @@ void __attribute__((weak)) arch_update_cpu_topology(void)
* For now this just excludes isolated cpus, but could be used to
* exclude other special cases in the future.
*/
-static int arch_init_sched_domains(const cpumask_t *cpu_map)
+static int arch_init_sched_domains(const struct cpumask *cpu_map)
{
int err;
arch_update_cpu_topology();
ndoms_cur = 1;
- doms_cur = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
+ doms_cur = kmalloc(cpumask_size(), GFP_KERNEL);
if (!doms_cur)
- doms_cur = &fallback_doms;
- cpus_andnot(*doms_cur, *cpu_map, cpu_isolated_map);
+ doms_cur = fallback_doms;
+ cpumask_andnot(doms_cur, cpu_map, cpu_isolated_map);
dattr_cur = NULL;
err = build_sched_domains(doms_cur);
register_sched_domain_sysctl();
@@ -7688,8 +7740,8 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map)
return err;
}
-static void arch_destroy_sched_domains(const cpumask_t *cpu_map,
- cpumask_t *tmpmask)
+static void arch_destroy_sched_domains(const struct cpumask *cpu_map,
+ struct cpumask *tmpmask)
{
free_sched_groups(cpu_map, tmpmask);
}
@@ -7698,15 +7750,16 @@ static void arch_destroy_sched_domains(const cpumask_t *cpu_map,
* Detach sched domains from a group of cpus specified in cpu_map
* These cpus will now be attached to the NULL domain
*/
-static void detach_destroy_domains(const cpumask_t *cpu_map)
+static void detach_destroy_domains(const struct cpumask *cpu_map)
{
- cpumask_t tmpmask;
+ /* Save because hotplug lock held. */
+ static DECLARE_BITMAP(tmpmask, CONFIG_NR_CPUS);
int i;
- for_each_cpu_mask_nr(i, *cpu_map)
+ for_each_cpu(i, cpu_map)
cpu_attach_domain(NULL, &def_root_domain, i);
synchronize_sched();
- arch_destroy_sched_domains(cpu_map, &tmpmask);
+ arch_destroy_sched_domains(cpu_map, to_cpumask(tmpmask));
}
/* handle null as "default" */
@@ -7731,7 +7784,7 @@ static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
* doms_new[] to the current sched domain partitioning, doms_cur[].
* It destroys each deleted domain and builds each new domain.
*
- * 'doms_new' is an array of cpumask_t's of length 'ndoms_new'.
+ * 'doms_new' is an array of cpumask's of length 'ndoms_new'.
* The masks don't intersect (don't overlap.) We should setup one
* sched domain for each mask. CPUs not in any of the cpumasks will
* not be load balanced. If the same cpumask appears both in the
@@ -7745,13 +7798,14 @@ static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
* the single partition 'fallback_doms', it also forces the domains
* to be rebuilt.
*
- * If doms_new == NULL it will be replaced with cpu_online_map.
+ * If doms_new == NULL it will be replaced with cpu_online_mask.
* ndoms_new == 0 is a special case for destroying existing domains,
* and it will not create the default domain.
*
* Call with hotplug lock held
*/
-void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
+/* FIXME: Change to struct cpumask *doms_new[] */
+void partition_sched_domains(int ndoms_new, struct cpumask *doms_new,
struct sched_domain_attr *dattr_new)
{
int i, j, n;
@@ -7766,7 +7820,7 @@ void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
/* Destroy deleted domains */
for (i = 0; i < ndoms_cur; i++) {
for (j = 0; j < n; j++) {
- if (cpus_equal(doms_cur[i], doms_new[j])
+ if (cpumask_equal(&doms_cur[i], &doms_new[j])
&& dattrs_equal(dattr_cur, i, dattr_new, j))
goto match1;
}
@@ -7778,15 +7832,15 @@ match1:
if (doms_new == NULL) {
ndoms_cur = 0;
- doms_new = &fallback_doms;
- cpus_andnot(doms_new[0], cpu_online_map, cpu_isolated_map);
+ doms_new = fallback_doms;
+ cpumask_andnot(&doms_new[0], cpu_online_mask, cpu_isolated_map);
WARN_ON_ONCE(dattr_new);
}
/* Build new domains */
for (i = 0; i < ndoms_new; i++) {
for (j = 0; j < ndoms_cur; j++) {
- if (cpus_equal(doms_new[i], doms_cur[j])
+ if (cpumask_equal(&doms_new[i], &doms_cur[j])
&& dattrs_equal(dattr_new, i, dattr_cur, j))
goto match2;
}
@@ -7798,7 +7852,7 @@ match2:
}
/* Remember the new sched domains */
- if (doms_cur != &fallback_doms)
+ if (doms_cur != fallback_doms)
kfree(doms_cur);
kfree(dattr_cur); /* kfree(NULL) is safe */
doms_cur = doms_new;
@@ -7938,7 +7992,9 @@ static int update_runtime(struct notifier_block *nfb,
void __init sched_init_smp(void)
{
- cpumask_t non_isolated_cpus;
+ cpumask_var_t non_isolated_cpus;
+
+ alloc_cpumask_var(&non_isolated_cpus, GFP_KERNEL);
#if defined(CONFIG_NUMA)
sched_group_nodes_bycpu = kzalloc(nr_cpu_ids * sizeof(void **),
@@ -7947,10 +8003,10 @@ void __init sched_init_smp(void)
#endif
get_online_cpus();
mutex_lock(&sched_domains_mutex);
- arch_init_sched_domains(&cpu_online_map);
- cpus_andnot(non_isolated_cpus, cpu_possible_map, cpu_isolated_map);
- if (cpus_empty(non_isolated_cpus))
- cpu_set(smp_processor_id(), non_isolated_cpus);
+ arch_init_sched_domains(cpu_online_mask);
+ cpumask_andnot(non_isolated_cpus, cpu_possible_mask, cpu_isolated_map);
+ if (cpumask_empty(non_isolated_cpus))
+ cpumask_set_cpu(smp_processor_id(), non_isolated_cpus);
mutex_unlock(&sched_domains_mutex);
put_online_cpus();
@@ -7965,9 +8021,13 @@ void __init sched_init_smp(void)
init_hrtick();
/* Move init over to a non-isolated CPU */
- if (set_cpus_allowed_ptr(current, &non_isolated_cpus) < 0)
+ if (set_cpus_allowed_ptr(current, non_isolated_cpus) < 0)
BUG();
sched_init_granularity();
+ free_cpumask_var(non_isolated_cpus);
+
+ alloc_cpumask_var(&fallback_doms, GFP_KERNEL);
+ init_sched_rt_class();
}
#else
void __init sched_init_smp(void)
@@ -8282,6 +8342,13 @@ void __init sched_init(void)
*/
current->sched_class = &fair_sched_class;
+ /* Allocate the nohz_cpu_mask if CONFIG_CPUMASK_OFFSTACK */
+ alloc_bootmem_cpumask_var(&nohz_cpu_mask);
+#ifdef CONFIG_NO_HZ
+ alloc_bootmem_cpumask_var(&nohz.cpu_mask);
+#endif
+ alloc_bootmem_cpumask_var(&cpu_isolated_map);
+
scheduler_running = 1;
}
diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c
index 52154fe..018b7be 100644
--- a/kernel/sched_cpupri.c
+++ b/kernel/sched_cpupri.c
@@ -67,24 +67,21 @@ static int convert_prio(int prio)
* Returns: (int)bool - CPUs were found
*/
int cpupri_find(struct cpupri *cp, struct task_struct *p,
- cpumask_t *lowest_mask)
+ struct cpumask *lowest_mask)
{
int idx = 0;
int task_pri = convert_prio(p->prio);
for_each_cpupri_active(cp->pri_active, idx) {
struct cpupri_vec *vec = &cp->pri_to_cpu[idx];
- cpumask_t mask;
if (idx >= task_pri)
break;
- cpus_and(mask, p->cpus_allowed, vec->mask);
-
- if (cpus_empty(mask))
+ if (cpumask_any_and(&p->cpus_allowed, vec->mask) >= nr_cpu_ids)
continue;
- *lowest_mask = mask;
+ cpumask_and(lowest_mask, &p->cpus_allowed, vec->mask);
return 1;
}
@@ -126,7 +123,7 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
vec->count--;
if (!vec->count)
clear_bit(oldpri, cp->pri_active);
- cpu_clear(cpu, vec->mask);
+ cpumask_clear_cpu(cpu, vec->mask);
spin_unlock_irqrestore(&vec->lock, flags);
}
@@ -136,7 +133,7 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
spin_lock_irqsave(&vec->lock, flags);
- cpu_set(cpu, vec->mask);
+ cpumask_set_cpu(cpu, vec->mask);
vec->count++;
if (vec->count == 1)
set_bit(newpri, cp->pri_active);
@@ -150,10 +147,11 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
/**
* cpupri_init - initialize the cpupri structure
* @cp: The cpupri context
+ * @bootmem: true if allocations need to use bootmem
*
- * Returns: (void)
+ * Returns: -ENOMEM if memory fails.
*/
-void cpupri_init(struct cpupri *cp)
+int cpupri_init(struct cpupri *cp, bool bootmem)
{
int i;
@@ -164,11 +162,30 @@ void cpupri_init(struct cpupri *cp)
spin_lock_init(&vec->lock);
vec->count = 0;
- cpus_clear(vec->mask);
+ if (bootmem)
+ alloc_bootmem_cpumask_var(&vec->mask);
+ else if (!alloc_cpumask_var(&vec->mask, GFP_KERNEL))
+ goto cleanup;
}
for_each_possible_cpu(i)
cp->cpu_to_pri[i] = CPUPRI_INVALID;
+ return 0;
+
+cleanup:
+ for (i--; i >= 0; i--)
+ free_cpumask_var(cp->pri_to_cpu[i].mask);
+ return -ENOMEM;
}
+/**
+ * cpupri_cleanup - clean up the cpupri structure
+ * @cp: The cpupri context
+ */
+void cpupri_cleanup(struct cpupri *cp)
+{
+ int i;
+ for (i = 0; i < CPUPRI_NR_PRIORITIES; i++)
+ free_cpumask_var(cp->pri_to_cpu[i].mask);
+}
diff --git a/kernel/sched_cpupri.h b/kernel/sched_cpupri.h
index f25811b..642a94e 100644
--- a/kernel/sched_cpupri.h
+++ b/kernel/sched_cpupri.h
@@ -14,7 +14,7 @@
struct cpupri_vec {
spinlock_t lock;
int count;
- cpumask_t mask;
+ cpumask_var_t mask;
};
struct cpupri {
@@ -27,7 +27,8 @@ struct cpupri {
int cpupri_find(struct cpupri *cp,
struct task_struct *p, cpumask_t *lowest_mask);
void cpupri_set(struct cpupri *cp, int cpu, int pri);
-void cpupri_init(struct cpupri *cp);
+int cpupri_init(struct cpupri *cp, bool bootmem);
+void cpupri_cleanup(struct cpupri *cp);
#else
#define cpupri_set(cp, cpu, pri) do { } while (0)
#define cpupri_init() do { } while (0)
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 98345e4..08ffffd 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1017,14 +1017,13 @@ static void yield_task_fair(struct rq *rq)
* search starts with cpus closest then further out as needed,
* so we always favor a closer, idle cpu.
* Domains may include CPUs that are not usable for migration,
- * hence we need to mask them out (cpu_active_map)
+ * hence we need to mask them out (cpu_active_mask)
*
* Returns the CPU we should wake onto.
*/
#if defined(ARCH_HAS_SCHED_WAKE_IDLE)
static int wake_idle(int cpu, struct task_struct *p)
{
- cpumask_t tmp;
struct sched_domain *sd;
int i;
@@ -1044,10 +1043,9 @@ static int wake_idle(int cpu, struct task_struct *p)
if ((sd->flags & SD_WAKE_IDLE)
|| ((sd->flags & SD_WAKE_IDLE_FAR)
&& !task_hot(p, task_rq(p)->clock, sd))) {
- cpus_and(tmp, sd->span, p->cpus_allowed);
- cpus_and(tmp, tmp, cpu_active_map);
- for_each_cpu_mask_nr(i, tmp) {
- if (idle_cpu(i)) {
+ for_each_cpu_and(i, sched_domain_span(sd),
+ &p->cpus_allowed) {
+ if (cpu_active(i) && idle_cpu(i)) {
if (i != task_cpu(p)) {
schedstat_inc(p,
se.nr_wakeups_idle);
@@ -1240,13 +1238,13 @@ static int select_task_rq_fair(struct task_struct *p, int sync)
* this_cpu and prev_cpu are present in:
*/
for_each_domain(this_cpu, sd) {
- if (cpu_isset(prev_cpu, sd->span)) {
+ if (cpumask_test_cpu(prev_cpu, sched_domain_span(sd))) {
this_sd = sd;
break;
}
}
- if (unlikely(!cpu_isset(this_cpu, p->cpus_allowed)))
+ if (unlikely(!cpumask_test_cpu(this_cpu, &p->cpus_allowed)))
goto out;
/*
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 2bdd444..fb39645 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -15,7 +15,7 @@ static inline void rt_set_overload(struct rq *rq)
if (!rq->online)
return;
- cpu_set(rq->cpu, rq->rd->rto_mask);
+ cpumask_set_cpu(rq->cpu, rq->rd->rto_mask);
/*
* Make sure the mask is visible before we set
* the overload count. That is checked to determine
@@ -34,7 +34,7 @@ static inline void rt_clear_overload(struct rq *rq)
/* the order here really doesn't matter */
atomic_dec(&rq->rd->rto_count);
- cpu_clear(rq->cpu, rq->rd->rto_mask);
+ cpumask_clear_cpu(rq->cpu, rq->rd->rto_mask);
}
static void update_rt_migration(struct rq *rq)
@@ -139,14 +139,14 @@ static int rt_se_boosted(struct sched_rt_entity *rt_se)
}
#ifdef CONFIG_SMP
-static inline cpumask_t sched_rt_period_mask(void)
+static inline const struct cpumask *sched_rt_period_mask(void)
{
return cpu_rq(smp_processor_id())->rd->span;
}
#else
-static inline cpumask_t sched_rt_period_mask(void)
+static inline const struct cpumask *sched_rt_period_mask(void)
{
- return cpu_online_map;
+ return cpu_online_mask;
}
#endif
@@ -212,9 +212,9 @@ static inline int rt_rq_throttled(struct rt_rq *rt_rq)
return rt_rq->rt_throttled;
}
-static inline cpumask_t sched_rt_period_mask(void)
+static inline const struct cpumask *sched_rt_period_mask(void)
{
- return cpu_online_map;
+ return cpu_online_mask;
}
static inline
@@ -241,11 +241,11 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
int i, weight, more = 0;
u64 rt_period;
- weight = cpus_weight(rd->span);
+ weight = cpumask_weight(rd->span);
spin_lock(&rt_b->rt_runtime_lock);
rt_period = ktime_to_ns(rt_b->rt_period);
- for_each_cpu_mask_nr(i, rd->span) {
+ for_each_cpu(i, rd->span) {
struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i);
s64 diff;
@@ -324,7 +324,7 @@ static void __disable_runtime(struct rq *rq)
/*
* Greedy reclaim, take back as much as we can.
*/
- for_each_cpu_mask(i, rd->span) {
+ for_each_cpu(i, rd->span) {
struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i);
s64 diff;
@@ -429,13 +429,13 @@ static inline int balance_runtime(struct rt_rq *rt_rq)
static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
{
int i, idle = 1;
- cpumask_t span;
+ const struct cpumask *span;
if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
return 1;
span = sched_rt_period_mask();
- for_each_cpu_mask(i, span) {
+ for_each_cpu(i, span) {
int enqueue = 0;
struct rt_rq *rt_rq = sched_rt_period_rt_rq(rt_b, i);
struct rq *rq = rq_of_rt_rq(rt_rq);
@@ -805,17 +805,20 @@ static int select_task_rq_rt(struct task_struct *p, int sync)
static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
{
- cpumask_t mask;
+ cpumask_var_t mask;
if (rq->curr->rt.nr_cpus_allowed == 1)
return;
- if (p->rt.nr_cpus_allowed != 1
- && cpupri_find(&rq->rd->cpupri, p, &mask))
+ if (!alloc_cpumask_var(&mask, GFP_ATOMIC))
return;
- if (!cpupri_find(&rq->rd->cpupri, rq->curr, &mask))
- return;
+ if (p->rt.nr_cpus_allowed != 1
+ && cpupri_find(&rq->rd->cpupri, p, mask))
+ goto free;
+
+ if (!cpupri_find(&rq->rd->cpupri, rq->curr, mask))
+ goto free;
/*
* There appears to be other cpus that can accept
@@ -824,6 +827,8 @@ static void check_preempt_equal_prio(struct rq *rq, struct task_struct
*p)
*/
requeue_task_rt(rq, p, 1);
resched_task(rq->curr);
+free:
+ free_cpumask_var(mask);
}
#endif /* CONFIG_SMP */
@@ -918,7 +923,7 @@ static void deactivate_task(struct rq *rq, struct task_struct *p, int
sleep);
static int pick_rt_task(struct rq *rq, struct task_struct *p, int cpu)
{
if (!task_running(rq, p) &&
- (cpu < 0 || cpu_isset(cpu, p->cpus_allowed)) &&
+ (cpu < 0 || cpumask_test_cpu(cpu, &p->cpus_allowed)) &&
(p->rt.nr_cpus_allowed > 1))
return 1;
return 0;
@@ -957,7 +962,7 @@ static struct task_struct *pick_next_highest_task_rt(struct rq *rq, int
cpu)
return next;
}
-static DEFINE_PER_CPU(cpumask_t, local_cpu_mask);
+static DEFINE_PER_CPU(cpumask_var_t, local_cpu_mask);
static inline int pick_optimal_cpu(int this_cpu, cpumask_t *mask)
{
@@ -977,7 +982,7 @@ static inline int pick_optimal_cpu(int this_cpu, cpumask_t *mask)
static int find_lowest_rq(struct task_struct *task)
{
struct sched_domain *sd;
- cpumask_t *lowest_mask = &__get_cpu_var(local_cpu_mask);
+ struct cpumask *lowest_mask = __get_cpu_var(local_cpu_mask);
int this_cpu = smp_processor_id();
int cpu = task_cpu(task);
@@ -992,7 +997,7 @@ static int find_lowest_rq(struct task_struct *task)
* I guess we might want to change cpupri_find() to ignore those
* in the first place.
*/
- cpus_and(*lowest_mask, *lowest_mask, cpu_active_map);
+ cpumask_and(lowest_mask, lowest_mask, cpu_active_mask);
/*
* At this point we have built a mask of cpus representing the
@@ -1002,7 +1007,7 @@ static int find_lowest_rq(struct task_struct *task)
* We prioritize the last cpu that the task executed on since
* it is most likely cache-hot in that location.
*/
- if (cpu_isset(cpu, *lowest_mask))
+ if (cpumask_test_cpu(cpu, lowest_mask))
return cpu;
/*
@@ -1017,7 +1022,8 @@ static int find_lowest_rq(struct task_struct *task)
cpumask_t domain_mask;
int best_cpu;
- cpus_and(domain_mask, sd->span, *lowest_mask);
+ cpumask_and(&domain_mask, sched_domain_span(sd),
+ lowest_mask);
best_cpu = pick_optimal_cpu(this_cpu,
&domain_mask);
@@ -1058,8 +1064,8 @@ static struct rq *find_lock_lowest_rq(struct task_struct *task, struct
rq *rq)
* Also make sure that it wasn't scheduled on its rq.
*/
if (unlikely(task_rq(task) != rq ||
- !cpu_isset(lowest_rq->cpu,
- task->cpus_allowed) ||
+ !cpumask_test_cpu(lowest_rq->cpu,
+ &task->cpus_allowed) ||
task_running(rq, task) ||
!task->se.on_rq)) {
@@ -1180,7 +1186,7 @@ static int pull_rt_task(struct rq *this_rq)
next = pick_next_task_rt(this_rq);
- for_each_cpu_mask_nr(cpu, this_rq->rd->rto_mask) {
+ for_each_cpu(cpu, this_rq->rd->rto_mask) {
if (this_cpu == cpu)
continue;
@@ -1309,9 +1315,9 @@ move_one_task_rt(struct rq *this_rq, int this_cpu, struct rq *busiest,
}
static void set_cpus_allowed_rt(struct task_struct *p,
- const cpumask_t *new_mask)
+ const struct cpumask *new_mask)
{
- int weight = cpus_weight(*new_mask);
+ int weight = cpumask_weight(new_mask);
BUG_ON(!rt_task(p));
@@ -1332,7 +1338,7 @@ static void set_cpus_allowed_rt(struct task_struct *p,
update_rt_migration(rq);
}
- p->cpus_allowed = *new_mask;
+ cpumask_copy(&p->cpus_allowed, new_mask);
p->rt.nr_cpus_allowed = weight;
}
@@ -1545,3 +1551,12 @@ static void print_rt_stats(struct seq_file *m, int cpu)
rcu_read_unlock();
}
#endif /* CONFIG_SCHED_DEBUG */
+
+/* Note that this is never called for !SMP, but that's OK. */
+static inline void init_sched_rt_class(void)
+{
+ unsigned int i;
+
+ for_each_possible_cpu(i)
+ alloc_cpumask_var(&per_cpu(local_cpu_mask, i), GFP_KERNEL);
+}
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index 7dbf72a..ce34083 100644
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -42,7 +42,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
for_each_domain(cpu, sd) {
enum cpu_idle_type itype;
- cpumask_scnprintf(mask_str, mask_len, sd->span);
+ cpumask_scnprintf(mask_str, mask_len,
+ *sched_domain_span(sd));
seq_printf(seq, "domain%d %s", dcount++, mask_str);
for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
itype++) {
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 342fc9c..70f872c 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -144,7 +144,7 @@ void tick_nohz_update_jiffies(void)
if (!ts->tick_stopped)
return;
- cpu_clear(cpu, nohz_cpu_mask);
+ cpumask_clear_cpu(cpu, nohz_cpu_mask);
now = ktime_get();
ts->idle_waketime = now;
@@ -283,7 +283,7 @@ void tick_nohz_stop_sched_tick(int inidle)
if ((long)delta_jiffies >= 1) {
if (delta_jiffies > 1)
- cpu_set(cpu, nohz_cpu_mask);
+ cpumask_set_cpu(cpu, nohz_cpu_mask);
/*
* nohz_stop_sched_tick can be called several times before
* the nohz_restart_sched_tick is called. This happens when
@@ -296,7 +296,7 @@ void tick_nohz_stop_sched_tick(int inidle)
/*
* sched tick not stopped!
*/
- cpu_clear(cpu, nohz_cpu_mask);
+ cpumask_clear_cpu(cpu, nohz_cpu_mask);
goto out;
}
@@ -354,7 +354,7 @@ void tick_nohz_stop_sched_tick(int inidle)
* softirq.
*/
tick_do_update_jiffies64(ktime_get());
- cpu_clear(cpu, nohz_cpu_mask);
+ cpumask_clear_cpu(cpu, nohz_cpu_mask);
}
raise_softirq_irqoff(TIMER_SOFTIRQ);
out:
@@ -432,7 +432,7 @@ void tick_nohz_restart_sched_tick(void)
select_nohz_load_balancer(0);
now = ktime_get();
tick_do_update_jiffies64(now);
- cpu_clear(cpu, nohz_cpu_mask);
+ cpumask_clear_cpu(cpu, nohz_cpu_mask);
/*
* We stopped the tick in idle. Update process times would miss the
--
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