From: Johannes Stezenbach <js@sig21.net>
To: Ingo Molnar <mingo@elte.hu>
Cc: Robert Richter <robert.richter@amd.com>,
Steven Rostedt <rostedt@goodmis.org>,
Andi Kleen <andi@firstfloor.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: 2.6.31-rc5 regression: x86 MCE malfunction on Thinkpad T42p
Date: Tue, 11 Aug 2009 17:40:06 +0200 [thread overview]
Message-ID: <20090811154006.GA5315@sig21.net> (raw)
In-Reply-To: <20090810221307.GA19236@sig21.net>
On Tue, Aug 11, 2009 at 12:13:07AM +0200, Johannes Stezenbach wrote:
> On Mon, Aug 10, 2009 at 11:31:33PM +0200, Ingo Molnar wrote:
> > * Johannes Stezenbach <js@sig21.net> wrote:
> > >
> > > Could the warning be caused by the cpufreq ondemand governor? ISTR
> > > that one should switch to the performance governor before doing
> > > any profiling, but I forgot for this test.
> >
> > there might be a connection - it could in theory cause sched_clock()
> > transients and confuse the ring-buffer time-stamping.
>
> I'll try tomorrow after a fresh boot if the warning also appears
> with the performance governor.
Nope, cpufreq was not the culprit. The "Delta way too big!"
warning in rb_reserve_next_event() happens after suspend-to-RAM.
Johannes
next prev parent reply other threads:[~2009-08-11 15:40 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-07 17:09 2.6.31-rc5 regression: x86 MCE malfunction on Thinkpad T42p Johannes Stezenbach
2009-08-09 10:03 ` Johannes Stezenbach
2009-08-09 10:34 ` Bartlomiej Zolnierkiewicz
2009-08-09 16:47 ` Johannes Stezenbach
2009-08-10 10:31 ` Andi Kleen
2009-08-10 12:27 ` Johannes Stezenbach
2009-08-10 12:32 ` Andi Kleen
2009-08-10 12:56 ` Johannes Stezenbach
2009-08-10 13:29 ` Ingo Molnar
2009-08-10 19:26 ` Johannes Stezenbach
2009-08-10 19:44 ` Andi Kleen
2009-08-10 20:05 ` Robert Richter
2009-08-10 20:14 ` Ingo Molnar
2009-08-10 20:37 ` Johannes Stezenbach
2009-08-10 21:31 ` Ingo Molnar
2009-08-10 22:13 ` Johannes Stezenbach
2009-08-11 9:34 ` [patch] cache-miss and cache-refs events on P6-mobile CPUs Ingo Molnar
2009-08-11 9:39 ` Peter Zijlstra
2009-08-11 11:06 ` Ingo Molnar
2009-08-11 11:21 ` Peter Zijlstra
2009-08-11 15:50 ` Johannes Stezenbach
2009-08-11 16:56 ` Ingo Molnar
2009-08-11 15:40 ` Johannes Stezenbach [this message]
2009-08-17 14:49 ` 2.6.31-rc5 regression: x86 MCE malfunction on Thinkpad T42p Steven Rostedt
2009-08-12 11:59 ` *PING* [PATCH]: x86: mce: fix mce warning with disabled lapic Ingo Molnar
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