From: "Chris Friesen" <cfriesen@nortel.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Linux kernel <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [bug report] sched: stop_machine() usage causes load balancer to misbehave
Date: Fri, 03 Oct 2008 23:27:21 -0600 [thread overview]
Message-ID: <48E6FEB9.8070603@nortel.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0810022001250.26504@gandalf.stny.rr.com>
Steven Rostedt wrote:
> On Thu, 2 Oct 2008, Chris Friesen wrote:
>
>
>>I mentioned before that ftrace (specifically the ftraced daemon) seems to be
>>interfering with the load balancer. After some experimenting, it appears that
>>any regular calls to stop_machine() will end up confusing the load balancer.
>>
>>As an experiment, I disabled ftraced (which would normally result in correct
>>load balancing) but added a single kernel thread which simply runs the
>>following loop, where "chrisd2" is a dummy function.
>
>
>
> Chris,
>
> Thanks for looking into this. I don't have an answer for your question,
> but I'll work harder to get the MCOUNT_REC working in PPC.
>
> Does this happen with x86 too?
Unfortunately I don't have an x86 box handy for testing...I could
probably get some time on a lab machine next week.
Chris
prev parent reply other threads:[~2008-10-04 5:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-02 23:57 [bug report] sched: stop_machine() usage causes load balancer to misbehave Chris Friesen
2008-10-03 0:02 ` Steven Rostedt
2008-10-04 5:27 ` Chris Friesen [this message]
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