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Message-ID: <47D56399.1020504@gmail.com> Date: Mon, 10 Mar 2008 12:36:41 -0400 From: Gregory Haskins <gregory.haskins.ml@...il.com> To: ego@...ibm.com CC: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, Dhaval Giani <dhaval@...ux.vnet.ibm.com> Subject: Re: [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus Gautham R Shenoy wrote: > On Mon, Mar 10, 2008 at 01:24:18PM +0100, Ingo Molnar wrote: >> * Gautham R Shenoy <ego@...ibm.com> wrote: >> >>> x86: Don't send RESCHEDULE_VECTOR to offlined cpus. >>> From: Gautham R Shenoy <ego@...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 -- 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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