From: Gregory Haskins <gregory.haskins.ml@gmail.com>
To: ego@in.ibm.com
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org,
Dhaval Giani <dhaval@linux.vnet.ibm.com>
Subject: Re: [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus
Date: Mon, 10 Mar 2008 12:36:41 -0400 [thread overview]
Message-ID: <47D56399.1020504@gmail.com> (raw)
In-Reply-To: <20080310125414.GE17646@in.ibm.com>
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
next prev parent reply other threads:[~2008-03-10 16:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-10 12:14 [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus Gautham R Shenoy
2008-03-10 12:24 ` Ingo Molnar
2008-03-10 12:54 ` Gautham R Shenoy
2008-03-10 15:32 ` Roel Kluin
2008-03-10 16:36 ` Gregory Haskins [this message]
2008-03-11 9:21 ` Ingo Molnar
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