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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2011-05-17 15:44:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-18 02:55:23 -0700
commitd6c438b6cd733834a3cec55af8577a8fc3548016 (patch)
tree95c7719415aecf9f2a09b1e885d23ba54eb9b5b8 /arch/um/os-Linux/util.c
parentd5f33d45e4c0e306e8d16b4573891a65d9ad544f (diff)
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memcg: fix zone congestion
ZONE_CONGESTED should be a state of global memory reclaim. If not, a busy memcg sets this and give unnecessary throttoling in wait_iff_congested() against memory recalim in other contexts. This makes system performance bad. I'll think about "memcg is congested!" flag is required or not, later. But this fix is required first. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Acked-by: Ying Han <yinghan@google.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/os-Linux/util.c')
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