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authorTejun Heo <tj@kernel.org>2018-07-03 17:14:56 +0200
committerJens Axboe <axboe@kernel.dk>2018-07-09 17:07:54 +0200
commit2cf855837b89d92996cf264713f3bed2bf9b0b4f (patch)
treed2e61e78a5dce7925bebb7c50d345838aa948b4a /CREDITS
parentblkcg: add generic throttling mechanism (diff)
downloadlinux-2cf855837b89d92996cf264713f3bed2bf9b0b4f.tar.xz
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memcontrol: schedule throttling if we are congested
Memory allocations can induce swapping via kswapd or direct reclaim. If we are having IO done for us by kswapd and don't actually go into direct reclaim we may never get scheduled for throttling. So instead check to see if our cgroup is congested, and if so schedule the throttling. Before we return to user space the throttling stuff will only throttle if we actually required it. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Josef Bacik <jbacik@fb.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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