The patch titled
Subject: mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
has been added to the -mm tree. Its filename is
mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff.patch
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------------------------------------------------------
From: David Rientjes <rientjes@xxxxxxxxxx>
Subject: mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
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@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap_cgroup.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN mm/swap_cgroup.c~mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff mm/swap_cgroup.c
--- a/mm/swap_cgroup.c~mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff
+++ a/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);
}
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
mm-thp-fix-setting-of-defermadvise-thp-defrag-mode.patch
mm-swap_cgroup-reschedule-when-neeed-in-swap_cgroup_swapoff.patch
mm-vmstat-print-non-populated-zones-in-zoneinfo.patch
mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch
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