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authorJohannes Weiner <hannes@cmpxchg.org>2014-08-08 14:19:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 15:57:18 -0700
commit747db954cab64c6b7a95b121b517165f34751898 (patch)
tree35149b31a5f3a0bb85df2e40c79c46ed2df4f4ed /mm/swap.c
parent0a31bc97c80c3fa87b32c091d9a930ac19cd0c40 (diff)
downloadop-kernel-dev-747db954cab64c6b7a95b121b517165f34751898.zip
op-kernel-dev-747db954cab64c6b7a95b121b517165f34751898.tar.gz
mm: memcontrol: use page lists for uncharge batching
Pages are now uncharged at release time, and all sources of batched uncharges operate on lists of pages. Directly use those lists, and get rid of the per-task batching state. This also batches statistics accounting, in addition to the res counter charges, to reduce IRQ-disabling and re-enabling. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vladimir Davydov <vdavydov@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
-rw-r--r--mm/swap.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/mm/swap.c b/mm/swap.c
index 00523ff..6b2dc38 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -908,8 +908,6 @@ void release_pages(struct page **pages, int nr, bool cold)
struct lruvec *lruvec;
unsigned long uninitialized_var(flags);
- mem_cgroup_uncharge_start();
-
for (i = 0; i < nr; i++) {
struct page *page = pages[i];
@@ -941,7 +939,6 @@ void release_pages(struct page **pages, int nr, bool cold)
__ClearPageLRU(page);
del_page_from_lru_list(page, lruvec, page_off_lru(page));
}
- mem_cgroup_uncharge(page);
/* Clear Active bit in case of parallel mark_page_accessed */
__ClearPageActive(page);
@@ -951,8 +948,7 @@ void release_pages(struct page **pages, int nr, bool cold)
if (zone)
spin_unlock_irqrestore(&zone->lru_lock, flags);
- mem_cgroup_uncharge_end();
-
+ mem_cgroup_uncharge_list(&pages_to_free);
free_hot_cold_page_list(&pages_to_free, cold);
}
EXPORT_SYMBOL(release_pages);
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