On Wed, Oct 24, 2012 at 1:43 AM, Balbir Singh <bsingharora@xxxxxxxxx> wrote: > On Tue, Oct 23, 2012 at 3:45 PM, Michal Hocko <mhocko@xxxxxxx> wrote: >> On Tue 23-10-12 18:10:33, Qiang Gao wrote: >>> On Tue, Oct 23, 2012 at 5:50 PM, Michal Hocko <mhocko@xxxxxxx> 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. > > > Precisely! You need to have rt bandwidth enabled for RT tasks to run, > as a workaround please give the groups some RT bandwidth and then work > out the migration to RT and what should be the defaults on the distro. > > Balbir see https://patchwork.kernel.org/patch/719411/ -- 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>