On Fri, 16 Apr 2010 10:13:39 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > Hmm. Then, if memoy cgroup is filled by dirty pages, it can't kick writeback > and has to wait for someone else's writeback ? > > How long this will take ? > # mount -t cgroup none /cgroup -o memory > # mkdir /cgroup/A > # echo 20M > /cgroup/A/memory.limit_in_bytes > # echo $$ > /cgroup/A/tasks > # dd if=/dev/zero of=./tmpfile bs=4096 count=1000000 > > Can memcg ask writeback thread to "Wake Up Now! and Write this out!" effectively ? > Hmm.. I saw an oom-kill while testing several cases but performance itself seems not to be far different with or without patch. But I'm unhappy with oom-kill, so some tweak for memcg will be necessary if we'll go with this. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>