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Groups > linux.kernel > #1741447
| From | "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU |
| Date | 2017-09-28 13:10 +0200 |
| Message-ID | <uuERA-8eJ-25@gated-at.bofh.it> (permalink) |
| References | <un6L0-1Qb-13@gated-at.bofh.it> <un6L0-1Qb-17@gated-at.bofh.it> <uuD97-78P-11@gated-at.bofh.it> <uuEoy-7PA-23@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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: >> On Thu, Sep 7, 2017 at 8:03 AM, Peter Zijlstra <peterz@infradead.org> wrote: >> > Migrating tasks to offline CPUs is a pretty big fail, warn about it. >> >> Hey Peter, >> >> This seems to get hit on the latest -next: >> >> [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. If you have patches you want me try send them my way. -- Thanks, Sasha
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Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU Sasha Levin <levinsasha928@gmail.com> - 2017-09-28 11:20 +0200
Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU Peter Zijlstra <peterz@infradead.org> - 2017-09-28 12:40 +0200
Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-28 13:10 +0200
Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU Peter Zijlstra <peterz@infradead.org> - 2017-09-28 13:50 +0200
Re: [PATCH 3/4] sched: WARN when migrating to an offline CPU Peter Zijlstra <peterz@infradead.org> - 2017-09-29 13:20 +0200
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