From: David Rientjes <rientjes@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
Date: Thu, 6 Apr 2017 13:16:24 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.10.1704061315270.80559@chino.kir.corp.google.com> (raw)
We got need_resched() warnings in swap_cgroup_swapoff() because
swap_cgroup_ctrl[type].length is particularly large.
Reschedule when needed.
Signed-off-by: David Rientjes <rientjes@google.com>
---
mm/swap_cgroup.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/swap_cgroup.c b/mm/swap_cgroup.c
--- a/mm/swap_cgroup.c
+++ b/mm/swap_cgroup.c
@@ -201,6 +201,8 @@ void swap_cgroup_swapoff(int type)
struct page *page = map[i];
if (page)
__free_page(page);
+ if (!(i % SWAP_CLUSTER_MAX))
+ cond_resched();
}
vfree(map);
}
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next reply other threads:[~2017-04-06 20:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 20:16 David Rientjes [this message]
2017-04-07 8:00 ` Michal Hocko
2017-04-10 14:19 ` Johannes Weiner
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