> CC: "Johannes Weiner" <hannes@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, "cgroups mailinglist" <cgroups@xxxxxxxxxxxxxxx>, "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@xxxxxxxxxxxxxx>, righi.andrea@xxxxxxxxx >> CC: "Johannes Weiner" <hannes@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, "cgroups mailinglist" <cgroups@xxxxxxxxxxxxxxx>, "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@xxxxxxxxxxxxxx>, righi.andrea@xxxxxxxxx >>On Wed 10-07-13 18:25:06, azurIt wrote: >>> >> Now i realized that i forgot to remove UID from that cgroup before >>> >> trying to remove it, so cgroup cannot be removed anyway (we are using >>> >> third party cgroup called cgroup-uid from Andrea Righi, which is able >>> >> to associate all user's processes with target cgroup). Look here for >>> >> cgroup-uid patch: >>> >> https://www.develer.com/~arighi/linux/patches/cgroup-uid/cgroup-uid-v8.patch >>> >> >>> >> ANYWAY, i'm 101% sure that 'tasks' file was empty and 'under_oom' was >>> >> permanently '1'. >>> > >>> >This is really strange. Could you post the whole diff against stable >>> >tree you are using (except for grsecurity stuff and the above cgroup-uid >>> >patch)? >>> >>> >>> Here are all patches which i applied to kernel 3.2.48 in my last test: >>> http://watchdog.sk/lkml/patches3/ >> >>The two patches from Johannes seem correct. >> >>From a quick look even grsecurity patchset shouldn't interfere as it >>doesn't seem to put any code between handle_mm_fault and mm_fault_error >>and there also doesn't seem to be any new handle_mm_fault call sites. >> >>But I cannot tell there aren't other code paths which would lead to a >>memcg charge, thus oom, without proper FAULT_FLAG_KERNEL handling. > > >Michal, > >now i can definitely confirm that problem with unremovable cgroups persists. What info do you need from me? I applied also your little 'WARN_ON' patch. > >azur Ok, i think you want this: http://watchdog.sk/lkml/kern4.log -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>