The patch titled
Subject: mm: memcontrol: drain stocks on resize limit
has been added to the -mm tree. Its filename is
mm-memcontrol-drain-stocks-on-resize-limit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-drain-stocks-on-resize-limit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-drain-stocks-on-resize-limit.patch
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------------------------------------------------------
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: mm: memcontrol: drain stocks on resize limit
Resizing the memcg limit for cgroup-v2 drains the stocks before triggering
the memcg reclaim. Do the same for cgroup-v1 to make the behavior
consistent.
Link: http://lkml.kernel.org/r/20180504205548.110696-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN mm/memcontrol.c~mm-memcontrol-drain-stocks-on-resize-limit mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-drain-stocks-on-resize-limit
+++ a/mm/memcontrol.c
@@ -2455,6 +2455,7 @@ static int mem_cgroup_resize_max(struct
unsigned long max, bool memsw)
{
bool enlarge = false;
+ bool drained = false;
int ret;
bool limits_invariant;
struct page_counter *counter = memsw ? &memcg->memsw : &memcg->memory;
@@ -2485,6 +2486,12 @@ static int mem_cgroup_resize_max(struct
if (!ret)
break;
+ if (!drained) {
+ drain_all_stock(memcg);
+ drained = true;
+ continue;
+ }
+
if (!try_to_free_mem_cgroup_pages(memcg, 1,
GFP_KERNEL, !memsw)) {
ret = -EBUSY;
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
mm-memcg-remote-memcg-charging-for-kmem-allocations.patch
fs-fsnotify-account-fsnotify-metadata-to-kmemcg.patch
mm-memcontrol-drain-stocks-on-resize-limit.patch
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