diff options
| author | Yu Zhao <[email protected]> | 2017-06-16 14:02:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-06-17 06:37:05 +0900 |
| commit | ef70762948dde012146926720b70e79736336764 (patch) | |
| tree | c9ef4e1c0743451653e88b12cdc51c1fed39575b | |
| parent | 7258ae5c5a2ce2f5969e8b18b881be40ab55433d (diff) | |
swap: cond_resched in swap_cgroup_prepare()
I saw need_resched() warnings when swapping on large swapfile (TBs)
because continuously allocating many pages in swap_cgroup_prepare() took
too long.
We already cond_resched when freeing page in swap_cgroup_swapoff(). Do
the same for the page allocation.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Yu Zhao <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Vladimir Davydov <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/swap_cgroup.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/swap_cgroup.c b/mm/swap_cgroup.c index ac6318a064d3..3405b4ee1757 100644 --- a/mm/swap_cgroup.c +++ b/mm/swap_cgroup.c @@ -48,6 +48,9 @@ static int swap_cgroup_prepare(int type) if (!page) goto not_enough_page; ctrl->map[idx] = page; + + if (!(idx % SWAP_CLUSTER_MAX)) + cond_resched(); } return 0; not_enough_page: |