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Date: Mon, 24 Jun 2013 18:48:40 +0200 From: "azurIt" <azurit@...ox.sk> To: Michal Hocko <mhocko@...e.cz> Cc: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>, cgroups mailinglist <cgroups@...r.kernel.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Johannes Weiner <hannes@...xchg.org> Subject: Re: [PATCH for 3.2] memcg: do not trap chargers with full callstack on OOM >I would be really interesting to see what those tasks are blocked on. Ok, i got it! Problem occurs two times and it behaves differently each time, I was running kernel with that latest patch. 1.) It doesn't have impact on the whole server, only on one cgroup. Here are stacks: http://watchdog.sk/lkml/memcg-bug-7.tar.gz 2.) It almost takes down the server because of huge I/O on HDDs. Unfortunately, i had a bug in my script which was suppose to gather stacks (i wasn't able to do it by hand like in (1), server was almost unoperable). But I was lucky and somehow killed processes from problematic cgroup (via htop) and server was ok again EXCEPT one important thing - processes from that cgroup were still running in D state and i wasn't able to kill them for good. They were taking web server network ports so i had to reboot the server :( BUT, before that, i gathered stacks: http://watchdog.sk/lkml/memcg-bug-8.tar.gz What do you think? azur -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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