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authorVladimir Davydov <vdavydov@virtuozzo.com>2016-01-20 15:03:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 17:09:18 -0800
commitd8b38438a0bcb362c396f49d8279ef7b505917f4 (patch)
treed94ab559cb2112a78a653bf9b8ec3439658e3789 /include/linux/swap.h
parent6f2cb2f17700a39567cf3e9a2e95041def5f3688 (diff)
downloadop-kernel-dev-d8b38438a0bcb362c396f49d8279ef7b505917f4.zip
op-kernel-dev-d8b38438a0bcb362c396f49d8279ef7b505917f4.tar.gz
mm: vmscan: do not scan anon pages if memcg swap limit is hit
We don't scan anonymous memory if we ran out of swap, neither should we do it in case memcg swap limit is hit, because swap out is impossible anyway. Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
-rw-r--r--include/linux/swap.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h
index c2bd163..a587050 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -551,6 +551,7 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
extern int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry);
extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
+extern long mem_cgroup_get_nr_swap_pages(struct mem_cgroup *memcg);
#else
static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
{
@@ -565,6 +566,11 @@ static inline int mem_cgroup_try_charge_swap(struct page *page,
static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
{
}
+
+static inline long mem_cgroup_get_nr_swap_pages(struct mem_cgroup *memcg)
+{
+ return get_nr_swap_pages();
+}
#endif
#endif /* __KERNEL__*/
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