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Date: Mon, 7 Mar 2016 15:54:13 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Carsten Emde <C.Emde@...dl.org>,
John Kacur <jkacur@...hat.com>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [ANNOUNCE] 3.4.110-rt140
Dear RT Folks,
I'm pleased to announce the 3.4.110-rt140 stable release.
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
branch: v3.4-rt
Head SHA1: 644c33135750aabfc5af32719fe700aa3ed015c8
Or to build 3.4.110-rt140 directly, the following patches should be applied:
http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.4.tar.xz
http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.4.110.xz
http://www.kernel.org/pub/linux/kernel/projects/rt/3.4/patch-3.4.110-rt140.patch.xz
You can also build from 3.4.110-rt139 by applying the incremental patch:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.4/incr/patch-3.4.110-rt139-rt140.patch.xz
Enjoy,
-- Steve
Changes from v3.4.110-rt139:
---
Clark Williams (1):
rcu/torture: Comment out rcu_bh ops on PREEMPT_RT_FULL
Mike Galbraith (1):
tracing: Fix probe_wakeup_latency_hist_start() prototype
Sebastian Andrzej Siewior (4):
latencyhist: disable jump-labels
kernel: migrate_disable() do fastpath in atomic & irqs-off
kernel: softirq: unlock with irqs on
kernel: sched: Fix preempt_disable_ip recodring for preempt_disable()
Steven Rostedt (Red Hat) (1):
Linux 3.4.110-rt140
Yang Shi (1):
trace: Use rcuidle version for preemptoff_hist trace point
----
arch/Kconfig | 1 +
include/linux/ftrace.h | 12 ++++++++++++
include/linux/sched.h | 2 --
include/trace/events/hist.h | 1 +
kernel/rcutorture.c | 7 +++++++
kernel/sched/core.c | 18 ++++--------------
kernel/softirq.c | 6 +++---
kernel/trace/latency_hist.c | 4 ++--
kernel/trace/trace_irqsoff.c | 8 ++++----
localversion-rt | 2 +-
10 files changed, 35 insertions(+), 26 deletions(-)
---------------------------
diff --git a/arch/Kconfig b/arch/Kconfig
index 417ff4c6fc14..7b57cdc7b9b3 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -50,6 +50,7 @@ config KPROBES
config JUMP_LABEL
bool "Optimize very unlikely/likely branches"
depends on HAVE_ARCH_JUMP_LABEL
+ depends on (!INTERRUPT_OFF_HIST && !PREEMPT_OFF_HIST && !WAKEUP_LATENCY_HIST && !MISSED_TIMER_OFFSETS_HIST)
help
This option enables a transparent branch optimization that
makes certain almost-always-true or almost-always-false branch
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index bfbcd439e2c6..93bce698fb86 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -476,6 +476,18 @@ static inline void __ftrace_enabled_restore(int enabled)
# endif
#endif /* ifndef HAVE_ARCH_CALLER_ADDR */
+static inline unsigned long get_lock_parent_ip(void)
+{
+ unsigned long addr = CALLER_ADDR0;
+
+ if (!in_lock_functions(addr))
+ return addr;
+ addr = CALLER_ADDR1;
+ if (!in_lock_functions(addr))
+ return addr;
+ return CALLER_ADDR2;
+}
+
#ifdef CONFIG_IRQSOFF_TRACER
extern void time_hardirqs_on(unsigned long a0, unsigned long a1);
extern void time_hardirqs_off(unsigned long a0, unsigned long a1);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index daf469059630..029575fb9bc8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -148,8 +148,6 @@ extern unsigned long this_cpu_load(void);
extern void calc_global_load(unsigned long ticks);
extern void update_cpu_load_nohz(void);
-extern unsigned long get_parent_ip(unsigned long addr);
-
struct seq_file;
struct cfs_rq;
struct task_group;
diff --git a/include/trace/events/hist.h b/include/trace/events/hist.h
index 28646db2c775..47332b93e03d 100644
--- a/include/trace/events/hist.h
+++ b/include/trace/events/hist.h
@@ -9,6 +9,7 @@
#if !defined(CONFIG_PREEMPT_OFF_HIST) && !defined(CONFIG_INTERRUPT_OFF_HIST)
#define trace_preemptirqsoff_hist(a,b)
+#define trace_preemptirqsoff_hist_rcuidle(a, b)
#else
TRACE_EVENT(preemptirqsoff_hist,
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index a89b381a8c6e..8de00304751b 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -485,6 +485,7 @@ static struct rcu_torture_ops rcu_expedited_ops = {
.name = "rcu_expedited"
};
+#ifndef CONFIG_PREEMPT_RT_FULL
/*
* Definitions for rcu_bh torture testing.
*/
@@ -558,6 +559,12 @@ static struct rcu_torture_ops rcu_bh_expedited_ops = {
.name = "rcu_bh_expedited"
};
+#else
+static struct rcu_torture_ops rcu_bh_ops = {
+ .ttype = INVALID_RCU_FLAVOR,
+};
+#endif
+
/*
* Definitions for srcu torture testing.
*/
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index cc4df0131023..ec9bfbef9873 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3241,16 +3241,6 @@ void scheduler_tick(void)
#endif
}
-notrace unsigned long get_parent_ip(unsigned long addr)
-{
- if (in_lock_functions(addr)) {
- addr = CALLER_ADDR2;
- if (in_lock_functions(addr))
- addr = CALLER_ADDR3;
- }
- return addr;
-}
-
#if defined(CONFIG_PREEMPT) && (defined(CONFIG_DEBUG_PREEMPT) || \
defined(CONFIG_PREEMPT_TRACER))
@@ -3272,7 +3262,7 @@ void __kprobes add_preempt_count(int val)
PREEMPT_MASK - 10);
#endif
if (preempt_count() == val) {
- unsigned long ip = get_parent_ip(CALLER_ADDR1);
+ unsigned long ip = get_lock_parent_ip();
#ifdef CONFIG_DEBUG_PREEMPT
current->preempt_disable_ip = ip;
#endif
@@ -3298,7 +3288,7 @@ void __kprobes sub_preempt_count(int val)
#endif
if (preempt_count() == val)
- trace_preempt_on(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
+ trace_preempt_on(CALLER_ADDR0, get_lock_parent_ip());
preempt_count() -= val;
}
EXPORT_SYMBOL(sub_preempt_count);
@@ -3389,7 +3379,7 @@ void migrate_disable(void)
{
struct task_struct *p = current;
- if (in_atomic()) {
+ if (in_atomic() || irqs_disabled()) {
#ifdef CONFIG_SCHED_DEBUG
p->migrate_disable_atomic++;
#endif
@@ -3420,7 +3410,7 @@ void migrate_enable(void)
unsigned long flags;
struct rq *rq;
- if (in_atomic()) {
+ if (in_atomic() || irqs_disabled()) {
#ifdef CONFIG_SCHED_DEBUG
p->migrate_disable_atomic--;
#endif
diff --git a/kernel/softirq.c b/kernel/softirq.c
index ecf0ab0f7b4d..2cdd5102331b 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -207,7 +207,7 @@ static void __local_bh_disable(unsigned long ip, unsigned int cnt)
raw_local_irq_restore(flags);
if (preempt_count() == cnt)
- trace_preempt_off(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
+ trace_preempt_off(CALLER_ADDR0, get_lock_parent_ip());
}
#else /* !CONFIG_TRACE_IRQFLAGS */
static inline void __local_bh_disable(unsigned long ip, unsigned int cnt)
@@ -561,10 +561,10 @@ static int __thread_do_softirq(int cpu)
*/
if (local_softirq_pending())
__do_softirq_common(cpu >= 0);
- local_unlock(local_softirq_lock);
unpin_current_cpu();
- preempt_disable();
local_irq_enable();
+ local_unlock(local_softirq_lock);
+ preempt_disable();
return 0;
}
diff --git a/kernel/trace/latency_hist.c b/kernel/trace/latency_hist.c
index 6a4c8694c55a..900046843068 100644
--- a/kernel/trace/latency_hist.c
+++ b/kernel/trace/latency_hist.c
@@ -114,7 +114,7 @@ static DEFINE_PER_CPU(struct hist_data, wakeup_latency_hist_sharedprio);
static char *wakeup_latency_hist_dir = "wakeup";
static char *wakeup_latency_hist_dir_sharedprio = "sharedprio";
static notrace void probe_wakeup_latency_hist_start(void *v,
- struct task_struct *p, int success);
+ struct task_struct *p);
static notrace void probe_wakeup_latency_hist_stop(void *v,
struct task_struct *prev, struct task_struct *next);
static notrace void probe_sched_migrate_task(void *,
@@ -868,7 +868,7 @@ static notrace void probe_sched_migrate_task(void *v, struct task_struct *task,
}
static notrace void probe_wakeup_latency_hist_start(void *v,
- struct task_struct *p, int success)
+ struct task_struct *p)
{
unsigned long flags;
struct task_struct *curr = current;
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index bafa41220311..98ed28cf31cc 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -438,13 +438,13 @@ void start_critical_timings(void)
{
if (preempt_trace() || irq_trace())
start_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
- trace_preemptirqsoff_hist(TRACE_START, 1);
+ trace_preemptirqsoff_hist_rcuidle(TRACE_START, 1);
}
EXPORT_SYMBOL_GPL(start_critical_timings);
void stop_critical_timings(void)
{
- trace_preemptirqsoff_hist(TRACE_STOP, 0);
+ trace_preemptirqsoff_hist_rcuidle(TRACE_STOP, 0);
if (preempt_trace() || irq_trace())
stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
}
@@ -489,7 +489,7 @@ inline void print_irqtrace_events(struct task_struct *curr)
*/
void trace_hardirqs_on(void)
{
- trace_preemptirqsoff_hist(IRQS_ON, 0);
+ trace_preemptirqsoff_hist_rcuidle(IRQS_ON, 0);
if (!preempt_trace() && irq_trace())
stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
}
@@ -499,7 +499,7 @@ void trace_hardirqs_off(void)
{
if (!preempt_trace() && irq_trace())
start_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
- trace_preemptirqsoff_hist(IRQS_OFF, 1);
+ trace_preemptirqsoff_hist_rcuidle(IRQS_OFF, 1);
}
EXPORT_SYMBOL(trace_hardirqs_off);
diff --git a/localversion-rt b/localversion-rt
index e0b93414dc30..e27678f73d17 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt139
+-rt140
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