The patch titled
Subject: memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3
has been added to the -mm tree. Its filename is
memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch
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------------------------------------------------------
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3
TIF_NOTIFY_RESUME can be set from places other than try_charge() in which
case current->memcg_high_reclaim will be null. Correctly handle such
scenarios.
Link: http://lkml.kernel.org/r/20190110174432.82064-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/memcontrol.c~memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3
+++ a/mm/memcontrol.c
@@ -2156,15 +2156,17 @@ static void high_work_func(struct work_s
void mem_cgroup_handle_over_high(void)
{
unsigned int nr_pages = current->memcg_nr_pages_over_high;
- struct mem_cgroup *memcg;
+ struct mem_cgroup *memcg = current->memcg_high_reclaim;
if (likely(!nr_pages))
return;
- memcg = current->memcg_high_reclaim;
- current->memcg_high_reclaim = NULL;
+ if (!memcg)
+ memcg = get_mem_cgroup_from_mm(current->mm);
+
reclaim_high(memcg, nr_pages, GFP_KERNEL);
css_put(&memcg->css);
+ current->memcg_high_reclaim = NULL;
current->memcg_nr_pages_over_high = 0;
}
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
memcg-localize-memcg_kmem_enabled-check.patch
memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work.patch
memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch
