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mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()

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We got need_resched() warnings in swap_cgroup_swapoff() because
swap_cgroup_ctrl[type].length is particularly large.

Reschedule when needed.

Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1704061315270.80559@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Rientjes 2017-04-07 16:05:00 -07:00 committed by Linus Torvalds
parent e11f8b7b6c
commit 460bcec84e
1 changed files with 2 additions and 0 deletions
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2
mm/swap_cgroup.c
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@ -201,6 +201,8 @@ void swap_cgroup_swapoff(int type)
struct page *page = map[i]; struct page *page = map[i];
if (page) if (page)
__free_page(page); __free_page(page);
if (!(i % SWAP_CLUSTER_MAX))
cond_resched();
} }
vfree(map); vfree(map);
} }