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Date: Mon, 12 Sep 2011 12:57:20 +0200
From: Johannes Weiner <jweiner@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
Balbir Singh <bsingharora@...il.com>,
Ying Han <yinghan@...gle.com>, Michal Hocko <mhocko@...e.cz>,
Greg Thelen <gthelen@...gle.com>,
Michel Lespinasse <walken@...gle.com>,
Rik van Riel <riel@...hat.com>,
Minchan Kim <minchan.kim@...il.com>,
Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [patch 03/11] mm: vmscan: distinguish between memcg triggering reclaim and memcg being scanned
Memory cgroup hierarchies are currently handled completely outside of
the traditional reclaim code, which is invoked with a single memory
cgroup as an argument for the whole call stack.
Subsequent patches will switch this code to do hierarchical reclaim,
so there needs to be a distinction between a) the memory cgroup that
is triggering reclaim due to hitting its limit and b) the memory
cgroup that is being scanned as a child of a).
This patch introduces a struct mem_cgroup_zone that contains the
combination of the memory cgroup and the zone being scanned, which is
then passed down the stack instead of the zone argument.
Signed-off-by: Johannes Weiner <jweiner@...hat.com>
---
mm/vmscan.c | 251 +++++++++++++++++++++++++++++++++--------------------------
1 files changed, 142 insertions(+), 109 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 354f125..92f4e22 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -103,8 +103,11 @@ struct scan_control {
*/
reclaim_mode_t reclaim_mode;
- /* Which cgroup do we reclaim from */
- struct mem_cgroup *mem_cgroup;
+ /*
+ * The memory cgroup that hit its limit and as a result is the
+ * primary target of this reclaim invocation.
+ */
+ struct mem_cgroup *target_mem_cgroup;
/*
* Nodemask of nodes allowed by the caller. If NULL, all nodes
@@ -113,6 +116,11 @@ struct scan_control {
nodemask_t *nodemask;
};
+struct mem_cgroup_zone {
+ struct mem_cgroup *mem_cgroup;
+ struct zone *zone;
+};
+
#define lru_to_page(_head) (list_entry((_head)->prev, struct page, lru))
#ifdef ARCH_HAS_PREFETCH
@@ -155,12 +163,12 @@ static DECLARE_RWSEM(shrinker_rwsem);
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
static bool global_reclaim(struct scan_control *sc)
{
- return !sc->mem_cgroup;
+ return !sc->target_mem_cgroup;
}
-static bool scanning_global_lru(struct scan_control *sc)
+static bool scanning_global_lru(struct mem_cgroup_zone *mz)
{
- return !sc->mem_cgroup;
+ return !mz->mem_cgroup;
}
#else
static bool global_reclaim(struct scan_control *sc)
@@ -168,29 +176,30 @@ static bool global_reclaim(struct scan_control *sc)
return true;
}
-static bool scanning_global_lru(struct scan_control *sc)
+static bool scanning_global_lru(struct mem_cgroup_zone *mz)
{
return true;
}
#endif
-static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone,
- struct scan_control *sc)
+static struct zone_reclaim_stat *get_reclaim_stat(struct mem_cgroup_zone *mz)
{
- if (!scanning_global_lru(sc))
- return mem_cgroup_get_reclaim_stat(sc->mem_cgroup, zone);
+ if (!scanning_global_lru(mz))
+ return mem_cgroup_get_reclaim_stat(mz->mem_cgroup, mz->zone);
- return &zone->reclaim_stat;
+ return &mz->zone->reclaim_stat;
}
-static unsigned long zone_nr_lru_pages(struct zone *zone,
- struct scan_control *sc, enum lru_list lru)
+static unsigned long zone_nr_lru_pages(struct mem_cgroup_zone *mz,
+ enum lru_list lru)
{
- if (!scanning_global_lru(sc))
- return mem_cgroup_zone_nr_lru_pages(sc->mem_cgroup,
- zone_to_nid(zone), zone_idx(zone), BIT(lru));
+ if (!scanning_global_lru(mz))
+ return mem_cgroup_zone_nr_lru_pages(mz->mem_cgroup,
+ zone_to_nid(mz->zone),
+ zone_idx(mz->zone),
+ BIT(lru));
- return zone_page_state(zone, NR_LRU_BASE + lru);
+ return zone_page_state(mz->zone, NR_LRU_BASE + lru);
}
@@ -692,12 +701,13 @@ enum page_references {
};
static enum page_references page_check_references(struct page *page,
+ struct mem_cgroup_zone *mz,
struct scan_control *sc)
{
int referenced_ptes, referenced_page;
unsigned long vm_flags;
- referenced_ptes = page_referenced(page, 1, sc->mem_cgroup, &vm_flags);
+ referenced_ptes = page_referenced(page, 1, mz->mem_cgroup, &vm_flags);
referenced_page = TestClearPageReferenced(page);
/* Lumpy reclaim - ignore references */
@@ -771,7 +781,7 @@ static noinline_for_stack void free_page_list(struct list_head *free_pages)
* shrink_page_list() returns the number of reclaimed pages
*/
static unsigned long shrink_page_list(struct list_head *page_list,
- struct zone *zone,
+ struct mem_cgroup_zone *mz,
struct scan_control *sc,
int priority,
unsigned long *ret_nr_dirty,
@@ -802,7 +812,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
goto keep;
VM_BUG_ON(PageActive(page));
- VM_BUG_ON(page_zone(page) != zone);
+ VM_BUG_ON(page_zone(page) != mz->zone);
sc->nr_scanned++;
@@ -836,7 +846,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
}
}
- references = page_check_references(page, sc);
+ references = page_check_references(page, mz, sc);
switch (references) {
case PAGEREF_ACTIVATE:
goto activate_locked;
@@ -1028,7 +1038,7 @@ keep_lumpy:
* will encounter the same problem
*/
if (nr_dirty && nr_dirty == nr_congested && global_reclaim(sc))
- zone_set_flag(zone, ZONE_CONGESTED);
+ zone_set_flag(mz->zone, ZONE_CONGESTED);
free_page_list(&free_pages);
@@ -1364,13 +1374,14 @@ static int too_many_isolated(struct zone *zone, int file,
* TODO: Try merging with migrations version of putback_lru_pages
*/
static noinline_for_stack void
-putback_lru_pages(struct zone *zone, struct scan_control *sc,
- unsigned long nr_anon, unsigned long nr_file,
- struct list_head *page_list)
+putback_lru_pages(struct mem_cgroup_zone *mz, struct scan_control *sc,
+ unsigned long nr_anon, unsigned long nr_file,
+ struct list_head *page_list)
{
struct page *page;
struct pagevec pvec;
- struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
+ struct zone *zone = mz->zone;
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
pagevec_init(&pvec, 1);
@@ -1410,15 +1421,17 @@ putback_lru_pages(struct zone *zone, struct scan_control *sc,
pagevec_release(&pvec);
}
-static noinline_for_stack void update_isolated_counts(struct zone *zone,
- struct scan_control *sc,
- unsigned long *nr_anon,
- unsigned long *nr_file,
- struct list_head *isolated_list)
+static noinline_for_stack void
+update_isolated_counts(struct mem_cgroup_zone *mz,
+ struct scan_control *sc,
+ unsigned long *nr_anon,
+ unsigned long *nr_file,
+ struct list_head *isolated_list)
{
unsigned long nr_active;
+ struct zone *zone = mz->zone;
unsigned int count[NR_LRU_LISTS] = { 0, };
- struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
nr_active = clear_active_flags(isolated_list, count);
__count_vm_events(PGDEACTIVATE, nr_active);
@@ -1487,8 +1500,8 @@ static inline bool should_reclaim_stall(unsigned long nr_taken,
* of reclaimed pages
*/
static noinline_for_stack unsigned long
-shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
- struct scan_control *sc, int priority, int file)
+shrink_inactive_list(unsigned long nr_to_scan, struct mem_cgroup_zone *mz,
+ struct scan_control *sc, int priority, int file)
{
LIST_HEAD(page_list);
unsigned long nr_scanned;
@@ -1499,6 +1512,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
unsigned long nr_dirty = 0;
unsigned long nr_writeback = 0;
isolate_mode_t reclaim_mode = ISOLATE_INACTIVE;
+ struct zone *zone = mz->zone;
while (unlikely(too_many_isolated(zone, file, sc))) {
congestion_wait(BLK_RW_ASYNC, HZ/10);
@@ -1521,13 +1535,13 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
spin_lock_irq(&zone->lru_lock);
- if (scanning_global_lru(sc)) {
+ if (scanning_global_lru(mz)) {
nr_taken = isolate_pages_global(nr_to_scan, &page_list,
&nr_scanned, sc->order, reclaim_mode, zone, 0, file);
} else {
nr_taken = mem_cgroup_isolate_pages(nr_to_scan, &page_list,
&nr_scanned, sc->order, reclaim_mode, zone,
- sc->mem_cgroup, 0, file);
+ mz->mem_cgroup, 0, file);
}
if (global_reclaim(sc)) {
zone->pages_scanned += nr_scanned;
@@ -1544,17 +1558,17 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
return 0;
}
- update_isolated_counts(zone, sc, &nr_anon, &nr_file, &page_list);
+ update_isolated_counts(mz, sc, &nr_anon, &nr_file, &page_list);
spin_unlock_irq(&zone->lru_lock);
- nr_reclaimed = shrink_page_list(&page_list, zone, sc, priority,
+ nr_reclaimed = shrink_page_list(&page_list, mz, sc, priority,
&nr_dirty, &nr_writeback);
/* Check if we should syncronously wait for writeback */
if (should_reclaim_stall(nr_taken, nr_reclaimed, priority, sc)) {
set_reclaim_mode(priority, sc, true);
- nr_reclaimed += shrink_page_list(&page_list, zone, sc,
+ nr_reclaimed += shrink_page_list(&page_list, mz, sc,
priority, &nr_dirty, &nr_writeback);
}
@@ -1563,7 +1577,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone,
__count_vm_events(KSWAPD_STEAL, nr_reclaimed);
__count_zone_vm_events(PGSTEAL, zone, nr_reclaimed);
- putback_lru_pages(zone, sc, nr_anon, nr_file, &page_list);
+ putback_lru_pages(mz, sc, nr_anon, nr_file, &page_list);
/*
* If we have encountered a high number of dirty pages under writeback
@@ -1634,8 +1648,10 @@ static void move_active_pages_to_lru(struct zone *zone,
__count_vm_events(PGDEACTIVATE, pgmoved);
}
-static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
- struct scan_control *sc, int priority, int file)
+static void shrink_active_list(unsigned long nr_pages,
+ struct mem_cgroup_zone *mz,
+ struct scan_control *sc,
+ int priority, int file)
{
unsigned long nr_taken;
unsigned long pgscanned;
@@ -1644,9 +1660,10 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
LIST_HEAD(l_active);
LIST_HEAD(l_inactive);
struct page *page;
- struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
unsigned long nr_rotated = 0;
isolate_mode_t reclaim_mode = ISOLATE_ACTIVE;
+ struct zone *zone = mz->zone;
lru_add_drain();
@@ -1656,7 +1673,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
reclaim_mode |= ISOLATE_CLEAN;
spin_lock_irq(&zone->lru_lock);
- if (scanning_global_lru(sc)) {
+ if (scanning_global_lru(mz)) {
nr_taken = isolate_pages_global(nr_pages, &l_hold,
&pgscanned, sc->order,
reclaim_mode, zone,
@@ -1665,7 +1682,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
nr_taken = mem_cgroup_isolate_pages(nr_pages, &l_hold,
&pgscanned, sc->order,
reclaim_mode, zone,
- sc->mem_cgroup, 1, file);
+ mz->mem_cgroup, 1, file);
}
if (global_reclaim(sc))
@@ -1691,7 +1708,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
continue;
}
- if (page_referenced(page, 0, sc->mem_cgroup, &vm_flags)) {
+ if (page_referenced(page, 0, mz->mem_cgroup, &vm_flags)) {
nr_rotated += hpage_nr_pages(page);
/*
* Identify referenced, file-backed active pages and
@@ -1754,10 +1771,8 @@ static int inactive_anon_is_low_global(struct zone *zone)
* Returns true if the zone does not have enough inactive anon pages,
* meaning some active anon pages need to be deactivated.
*/
-static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
+static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
{
- int low;
-
/*
* If we don't have swap space, anonymous page deactivation
* is pointless.
@@ -1765,15 +1780,14 @@ static int inactive_anon_is_low(struct zone *zone, struct scan_control *sc)
if (!total_swap_pages)
return 0;
- if (scanning_global_lru(sc))
- low = inactive_anon_is_low_global(zone);
- else
- low = mem_cgroup_inactive_anon_is_low(sc->mem_cgroup, zone);
- return low;
+ if (!scanning_global_lru(mz))
+ return mem_cgroup_inactive_anon_is_low(mz->mem_cgroup,
+ mz->zone);
+
+ return inactive_anon_is_low_global(mz->zone);
}
#else
-static inline int inactive_anon_is_low(struct zone *zone,
- struct scan_control *sc)
+static inline int inactive_anon_is_low(struct mem_cgroup_zone *mz)
{
return 0;
}
@@ -1791,8 +1805,7 @@ static int inactive_file_is_low_global(struct zone *zone)
/**
* inactive_file_is_low - check if file pages need to be deactivated
- * @zone: zone to check
- * @sc: scan control of this context
+ * @mz: memory cgroup and zone to check
*
* When the system is doing streaming IO, memory pressure here
* ensures that active file pages get deactivated, until more
@@ -1804,45 +1817,44 @@ static int inactive_file_is_low_global(struct zone *zone)
* This uses a different ratio than the anonymous pages, because
* the page cache uses a use-once replacement algorithm.
*/
-static int inactive_file_is_low(struct zone *zone, struct scan_control *sc)
+static int inactive_file_is_low(struct mem_cgroup_zone *mz)
{
- int low;
+ if (!scanning_global_lru(mz))
+ return mem_cgroup_inactive_file_is_low(mz->mem_cgroup,
+ mz->zone);
- if (scanning_global_lru(sc))
- low = inactive_file_is_low_global(zone);
- else
- low = mem_cgroup_inactive_file_is_low(sc->mem_cgroup, zone);
- return low;
+ return inactive_file_is_low_global(mz->zone);
}
-static int inactive_list_is_low(struct zone *zone, struct scan_control *sc,
- int file)
+static int inactive_list_is_low(struct mem_cgroup_zone *mz, int file)
{
if (file)
- return inactive_file_is_low(zone, sc);
+ return inactive_file_is_low(mz);
else
- return inactive_anon_is_low(zone, sc);
+ return inactive_anon_is_low(mz);
}
static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
- struct zone *zone, struct scan_control *sc, int priority)
+ struct mem_cgroup_zone *mz,
+ struct scan_control *sc, int priority)
{
int file = is_file_lru(lru);
if (is_active_lru(lru)) {
- if (inactive_list_is_low(zone, sc, file))
- shrink_active_list(nr_to_scan, zone, sc, priority, file);
+ if (inactive_list_is_low(mz, file))
+ shrink_active_list(nr_to_scan, mz, sc, priority, file);
return 0;
}
- return shrink_inactive_list(nr_to_scan, zone, sc, priority, file);
+ return shrink_inactive_list(nr_to_scan, mz, sc, priority, file);
}
-static int vmscan_swappiness(struct scan_control *sc)
+static int vmscan_swappiness(struct mem_cgroup_zone *mz,
+ struct scan_control *sc)
{
- if (scanning_global_lru(sc))
+ if (global_reclaim(sc))
return vm_swappiness;
- return mem_cgroup_swappiness(sc->mem_cgroup);
+ return mem_cgroup_swappiness(mz->mem_cgroup);
}
/*
@@ -1853,13 +1865,13 @@ static int vmscan_swappiness(struct scan_control *sc)
*
* nr[0] = anon pages to scan; nr[1] = file pages to scan
*/
-static void get_scan_count(struct zone *zone, struct scan_control *sc,
- unsigned long *nr, int priority)
+static void get_scan_count(struct mem_cgroup_zone *mz, struct scan_control *sc,
+ unsigned long *nr, int priority)
{
unsigned long anon, file, free;
unsigned long anon_prio, file_prio;
unsigned long ap, fp;
- struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(mz);
u64 fraction[2], denominator;
enum lru_list l;
int noswap = 0;
@@ -1889,16 +1901,16 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
goto out;
}
- anon = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_ANON) +
- zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
- file = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_FILE) +
- zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
+ anon = zone_nr_lru_pages(mz, LRU_ACTIVE_ANON) +
+ zone_nr_lru_pages(mz, LRU_INACTIVE_ANON);
+ file = zone_nr_lru_pages(mz, LRU_ACTIVE_FILE) +
+ zone_nr_lru_pages(mz, LRU_INACTIVE_FILE);
if (global_reclaim(sc)) {
- free = zone_page_state(zone, NR_FREE_PAGES);
+ free = zone_page_state(mz->zone, NR_FREE_PAGES);
/* If we have very few page cache pages,
force-scan anon pages. */
- if (unlikely(file + free <= high_wmark_pages(zone))) {
+ if (unlikely(file + free <= high_wmark_pages(mz->zone))) {
fraction[0] = 1;
fraction[1] = 0;
denominator = 1;
@@ -1910,8 +1922,8 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
* With swappiness at 100, anonymous and file have the same priority.
* This scanning priority is essentially the inverse of IO cost.
*/
- anon_prio = vmscan_swappiness(sc);
- file_prio = 200 - vmscan_swappiness(sc);
+ anon_prio = vmscan_swappiness(mz, sc);
+ file_prio = 200 - vmscan_swappiness(mz, sc);
/*
* OK, so we have swap space and a fair amount of page cache
@@ -1924,7 +1936,7 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
*
* anon in [0], file in [1]
*/
- spin_lock_irq(&zone->lru_lock);
+ spin_lock_irq(&mz->zone->lru_lock);
if (unlikely(reclaim_stat->recent_scanned[0] > anon / 4)) {
reclaim_stat->recent_scanned[0] /= 2;
reclaim_stat->recent_rotated[0] /= 2;
@@ -1945,7 +1957,7 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
fp = (file_prio + 1) * (reclaim_stat->recent_scanned[1] + 1);
fp /= reclaim_stat->recent_rotated[1] + 1;
- spin_unlock_irq(&zone->lru_lock);
+ spin_unlock_irq(&mz->zone->lru_lock);
fraction[0] = ap;
fraction[1] = fp;
@@ -1955,7 +1967,7 @@ out:
int file = is_file_lru(l);
unsigned long scan;
- scan = zone_nr_lru_pages(zone, sc, l);
+ scan = zone_nr_lru_pages(mz, l);
if (priority || noswap) {
scan >>= priority;
if (!scan && force_scan)
@@ -1973,7 +1985,7 @@ out:
* back to the allocator and call try_to_compact_zone(), we ensure that
* there are enough free pages for it to be likely successful
*/
-static inline bool should_continue_reclaim(struct zone *zone,
+static inline bool should_continue_reclaim(struct mem_cgroup_zone *mz,
unsigned long nr_reclaimed,
unsigned long nr_scanned,
struct scan_control *sc)
@@ -2013,14 +2025,14 @@ static inline bool should_continue_reclaim(struct zone *zone,
* inactive lists are large enough, continue reclaiming
*/
pages_for_compaction = (2UL << sc->order);
- inactive_lru_pages = zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON) +
- zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
+ inactive_lru_pages = zone_nr_lru_pages(mz, LRU_INACTIVE_ANON) +
+ zone_nr_lru_pages(mz, LRU_INACTIVE_FILE);
if (sc->nr_reclaimed < pages_for_compaction &&
inactive_lru_pages > pages_for_compaction)
return true;
/* If compaction would go ahead or the allocation would succeed, stop */
- switch (compaction_suitable(zone, sc->order)) {
+ switch (compaction_suitable(mz->zone, sc->order)) {
case COMPACT_PARTIAL:
case COMPACT_CONTINUE:
return false;
@@ -2032,8 +2044,8 @@ static inline bool should_continue_reclaim(struct zone *zone,
/*
* This is a basic per-zone page freer. Used by both kswapd and direct reclaim.
*/
-static void shrink_zone(int priority, struct zone *zone,
- struct scan_control *sc)
+static void shrink_mem_cgroup_zone(int priority, struct mem_cgroup_zone *mz,
+ struct scan_control *sc)
{
unsigned long nr[NR_LRU_LISTS];
unsigned long nr_to_scan;
@@ -2045,7 +2057,7 @@ static void shrink_zone(int priority, struct zone *zone,
restart:
nr_reclaimed = 0;
nr_scanned = sc->nr_scanned;
- get_scan_count(zone, sc, nr, priority);
+ get_scan_count(mz, sc, nr, priority);
blk_start_plug(&plug);
while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] ||
@@ -2057,7 +2069,7 @@ restart:
nr[l] -= nr_to_scan;
nr_reclaimed += shrink_list(l, nr_to_scan,
- zone, sc, priority);
+ mz, sc, priority);
}
}
/*
@@ -2078,17 +2090,28 @@ restart:
* Even if we did not try to evict anon pages at all, we want to
* rebalance the anon lru active/inactive ratio.
*/
- if (inactive_anon_is_low(zone, sc))
- shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0);
+ if (inactive_anon_is_low(mz))
+ shrink_active_list(SWAP_CLUSTER_MAX, mz, sc, priority, 0);
/* reclaim/compaction might need reclaim to continue */
- if (should_continue_reclaim(zone, nr_reclaimed,
+ if (should_continue_reclaim(mz, nr_reclaimed,
sc->nr_scanned - nr_scanned, sc))
goto restart;
throttle_vm_writeout(sc->gfp_mask);
}
+static void shrink_zone(int priority, struct zone *zone,
+ struct scan_control *sc)
+{
+ struct mem_cgroup_zone mz = {
+ .mem_cgroup = sc->target_mem_cgroup,
+ .zone = zone,
+ };
+
+ shrink_mem_cgroup_zone(priority, &mz, sc);
+}
+
/*
* This is the direct reclaim path, for page-allocating processes. We only
* try to reclaim pages from zones which will satisfy the caller's allocation
@@ -2206,7 +2229,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
for (priority = DEF_PRIORITY; priority >= 0; priority--) {
sc->nr_scanned = 0;
if (!priority)
- disable_swap_token(sc->mem_cgroup);
+ disable_swap_token(sc->target_mem_cgroup);
shrink_zones(priority, zonelist, sc);
/*
* Don't shrink slabs when reclaiming memory from
@@ -2290,7 +2313,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
.may_unmap = 1,
.may_swap = 1,
.order = order,
- .mem_cgroup = NULL,
+ .target_mem_cgroup = NULL,
.nodemask = nodemask,
};
struct shrink_control shrink = {
@@ -2322,7 +2345,7 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
.may_unmap = 1,
.may_swap = !noswap,
.order = 0,
- .mem_cgroup = mem,
+ .target_mem_cgroup = mem,
};
sc.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
@@ -2360,7 +2383,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
.may_swap = !noswap,
.nr_to_reclaim = SWAP_CLUSTER_MAX,
.order = 0,
- .mem_cgroup = mem_cont,
+ .target_mem_cgroup = mem_cont,
.nodemask = NULL, /* we don't care the placement */
.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
@@ -2390,6 +2413,18 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
}
#endif
+static void age_active_anon(struct zone *zone, struct scan_control *sc,
+ int priority)
+{
+ struct mem_cgroup_zone mz = {
+ .mem_cgroup = NULL,
+ .zone = zone,
+ };
+
+ if (inactive_anon_is_low(&mz))
+ shrink_active_list(SWAP_CLUSTER_MAX, &mz, sc, priority, 0);
+}
+
/*
* pgdat_balanced is used when checking if a node is balanced for high-order
* allocations. Only zones that meet watermarks and are in a zone allowed
@@ -2510,7 +2545,7 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
*/
.nr_to_reclaim = ULONG_MAX,
.order = order,
- .mem_cgroup = NULL,
+ .target_mem_cgroup = NULL,
};
struct shrink_control shrink = {
.gfp_mask = sc.gfp_mask,
@@ -2549,9 +2584,7 @@ loop_again:
* Do some background aging of the anon list, to give
* pages a chance to be referenced before reclaiming.
*/
- if (inactive_anon_is_low(zone, &sc))
- shrink_active_list(SWAP_CLUSTER_MAX, zone,
- &sc, priority, 0);
+ age_active_anon(zone, &sc, priority);
if (!zone_watermark_ok_safe(zone, order,
high_wmark_pages(zone), 0, 0)) {
--
1.7.6
--
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