Re: [patch 0/7] improve memcg oom killer robustness v2

["azurIt" <azurit@pobox.sk>]

>> >[...]
>> >> My script has just detected (and killed) another freezed cgroup. I
>> >> must say that i'm not 100% sure that cgroup was really freezed but it
>> >> has 99% or more memory usage for at least 30 seconds (well, or it has
>> >> 99% memory usage in both two cases the script was checking it). Here
>> >> are stacks of processes inside it before they were killed:
>> >[...]
>> >> pid: 26536
>> >> stack:
>> >> [<ffffffff81080a45>] refrigerator+0x95/0x160
>> >> [<ffffffff8106ac2b>] get_signal_to_deliver+0x1cb/0x540
>> >> [<ffffffff8100188b>] do_signal+0x6b/0x750
>> >> [<ffffffff81001fc5>] do_notify_resume+0x55/0x80
>> >> [<ffffffff815cb662>] retint_signal+0x3d/0x7b
>> >> [<ffffffffffffffff>] 0xffffffffffffffff
>> >
>> >[...]
>> >
>> >This task is sitting in the refigerator which means it has been frozen
>> >by the freezer cgroup most probably. I am not familiar with the
>> >implementation but my recollection is that you have to thaw that group
>> >in order the killed process can pass away.
>> 
>> Yes, my script is freezing the cgroup before killing processes inside
>> it. Stacks are taken after the freeze, it that problem?
>
>I thought you had a problem to remove this particular group...



No, this one is different from the unremovable one. This was, probably, hanged just like when i was originaly reporting this problem (but, as i said, i'm not 100% sure because of reasons i described). Sorry for confusion.

azur