Messages in this thread | | | Date | Thu, 28 Sep 2017 13:42:49 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU |
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On Thu, Sep 28, 2017 at 11:03:10AM +0000, Levin, Alexander (Sasha Levin) wrote: > On Thu, Sep 28, 2017 at 12:35:41PM +0200, Peter Zijlstra wrote: > >On Thu, Sep 28, 2017 at 02:14:15AM -0700, Sasha Levin wrote:
> >> [2035565360.446794] Unregister pv shared memory for cpu 2 > >> [2035565360.467930] numa_remove_cpu cpu 2 node 2: mask now 6 > >> [2035565360.471431] ------------[ cut here ]------------ > >> [2035565360.472548] WARNING: CPU: 2 PID: 24 at > kernel/sched/core.c:1178 set_task_cpu (kernel/sched/core.c:1157) > >> [2035565360.473840] Modules linked in: > >> [2035565360.474632] CPU: 2 PID: 24 Comm: migration/2 Not tainted > 4.14.0-rc2-next-20170927+ #252 > > > >Urgh, weird. That really shouldn't happen. Can you easily reproduce? > > Looks like yes. Seems like it's enough to stress CPU hotplug + trinity.
OK, I'll see if I can reproduce building kernels and hotplug stress. Otherwise I'll try and cook up some debug patches for you.
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