Messages in this thread | | | Date | Mon, 10 Mar 2008 12:36:41 -0400 | From | Gregory Haskins <> | Subject | Re: [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus |
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Gautham R Shenoy wrote: > On Mon, Mar 10, 2008 at 01:24:18PM +0100, Ingo Molnar wrote: >> * Gautham R Shenoy <ego@in.ibm.com> wrote: >> >>> x86: Don't send RESCHEDULE_VECTOR to offlined cpus. >>> From: Gautham R Shenoy <ego@in.ibm.com> >>> >>> In the x86 native_smp_send_reschedule_function(), don't send the IPI >>> if the cpu has gone offline already. Warn nevertheless!! >> have you seen this happen? > > Yup, this afternoon while running > cpu-hotplug stress tests (http://lkml.org/lkml/2008/3/3/11) > in parallel with kern-bench, I got this on the serial console.
Note that this may be a side-effect of the bug we are chasing with the rd->online problem.
E.g. if the rd->online issue is causing us to route tasks to dead CPUs, this phenomenon would probably go away once rd->online is fixed (which I believe it is with the patches that were submitted).
Regards, -Greg
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