linux-kernel - Re: perf sched record hangs machine

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Message-ID: <20090923114258.GA4132@elte.hu>
Date:	Wed, 23 Sep 2009 13:42:58 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Chris Malley <mail@...ismalley.co.uk>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: perf sched record hangs machine


* Chris Malley <mail@...ismalley.co.uk> wrote:

> 2009/9/23 Ingo Molnar <mingo@...e.hu>:
> >
> > * Chris Malley <mail@...ismalley.co.uk> wrote:
> >
> >> Applied Peter's patch, doesn't seem to have fixed the problem:
> >>
> >> [ ?246.408893] BUG: unable to handle kernel paging request at ffffb300
> >> [ ?246.408939] IP: [<c011b0bd>] default_send_IPI_self+0x1d/0x50
> >
> > could you please send the full bootlog, up to the crash?
> >
> > Thanks,
> >
> > ? ? ? ?Ingo
> >
> 
> Sure, but I'm just rebuilding from clean first in case the change
> wasn't picked up for some reason, because I don't see how it can get
> to default_send_IPI_self() in my configuration...

yeah - i have that thinking too - according to your earlier boot 
messages x86_pmu.apic must be 0 and that codepath shouldnt trigger.

	Ingo
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