Messages in this thread | | | Date | Thu, 11 Sep 2014 16:10:51 +0200 | From | Michal Hocko <> | Subject | Re: [Patch v4 1/2] freezer: check OOM kill while being frozen |
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On Thu 11-09-14 16:26:56, Rafael J. Wysocki wrote: > On Thursday, September 11, 2014 04:04:48 PM Michal Hocko wrote: > > On Thu 11-09-14 16:17:56, Rafael J. Wysocki wrote: > > [...] > > > And I'm still wondering if the OOM killer may be made avoid killing frozen > > > tasks. > > > > This is really tricky. OOM killer aims at the biggest memory hog. We > > shouldn't ignore it just because it hides into the fridge... So even > > if we "fix" oom killer to ignore frozen tasks (which is inherently > > racy btw.) then we have a potential problem of freezer abuse (e.g. in > > container environments). So I strongly believe that the OOM killer has > > to be able to kill a frozen tasks. > > OK > > Is the OOM killer the only place where TIF_MEMDIE is set?
Yes. To be precise, lowmemorykiller (staging android thingy), global OOM killer and memcg OOM killer. Any other users would be an abuse.
-- Michal Hocko SUSE Labs
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