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Date: Tue, 23 Oct 2012 12:15:00 +0200 From: Michal Hocko <mhocko@...e.cz> To: Qiang Gao <gaoqiangscut@...il.com> Cc: Balbir Singh <bsingharora@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>, "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>, linux-mm@...ck.org Subject: Re: process hangs on do_exit when oom happens On Tue 23-10-12 18:10:33, Qiang Gao wrote: > On Tue, Oct 23, 2012 at 5:50 PM, Michal Hocko <mhocko@...e.cz> wrote: > > On Tue 23-10-12 15:18:48, Qiang Gao wrote: > >> This process was moved to RT-priority queue when global oom-killer > >> happened to boost the recovery of the system.. > > > > Who did that? oom killer doesn't boost the priority (scheduling class) > > AFAIK. > > > >> but it wasn't get properily dealt with. I still have no idea why where > >> the problem is .. > > > > Well your configuration says that there is no runtime reserved for the > > group. > > Please refer to Documentation/scheduler/sched-rt-group.txt for more > > information. > > [...] > maybe this is not a upstream-kernel bug. the centos/redhat kernel > would boost the process to RT prio when the process was selected > by oom-killer. This still looks like your cpu controller is misconfigured. Even if the task is promoted to be realtime. -- Michal Hocko SUSE Labs -- 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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