From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>,
Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Chris Malley <mail@chrismalley.co.uk>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: perf sched record hangs machine
Date: Wed, 23 Sep 2009 09:32:53 +0200 [thread overview]
Message-ID: <20090923073253.GA18022@elte.hu> (raw)
In-Reply-To: <1253686585.7695.84.camel@twins>
* Peter Zijlstra <peterz@infradead.org> wrote:
> .size default_send_IPI_self, .-default_send_IPI_self
>
> Which seems to suggest that cmove is in __prepare_ICR, but I'm not
> sure how that can cause a page-fault, as that function is rather
> pointer-less.
>
> Did it maybe delay evaluating apic->dest_logical that late, it appear
> to be the first usage of that argument?
>
> Ingo, any ideas?
Yeah, the problem is:
[ 0.042445] Local APIC not detected. Using dummy APIC emulation.
we shouldnt be trying to program the lapic in that case - all ops should
be a NOP, including send-ipi-self. Cyrill?
Ingo
next prev parent reply other threads:[~2009-09-23 7:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-22 21:09 perf sched record hangs machine Chris Malley
2009-09-22 21:24 ` Frederic Weisbecker
2009-09-22 21:44 ` Frederic Weisbecker
2009-09-23 6:16 ` Peter Zijlstra
2009-09-23 7:32 ` Ingo Molnar [this message]
2009-09-23 7:40 ` Ingo Molnar
2009-09-23 7:44 ` Cyrill Gorcunov
2009-09-23 8:48 ` Cyrill Gorcunov
2009-09-23 8:52 ` Peter Zijlstra
2009-09-23 9:15 ` Chris Malley
2009-09-23 9:20 ` Ingo Molnar
2009-09-23 9:48 ` Cyrill Gorcunov
2009-09-23 10:06 ` Chris Malley
2009-09-23 10:12 ` Cyrill Gorcunov
2009-09-23 10:42 ` Ingo Molnar
2009-09-23 11:41 ` Chris Malley
2009-09-23 11:42 ` Ingo Molnar
2009-09-23 12:20 ` Chris Malley
2009-09-23 12:27 ` Ingo Molnar
2009-09-23 10:41 ` Ingo Molnar
2009-09-23 9:03 ` Peter Zijlstra
2009-09-23 11:49 ` [tip:perf/urgent] perf_event, x86: Fix 'perf sched record' crashing the machine tip-bot for Peter Zijlstra
2009-09-23 12:15 ` Chris Malley
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