Re: [Bug #16399] perf failed with kernel 2.6.35-rc
From: Rafael J. Wysocki
Date: Mon Aug 30 2010 - 13:34:06 EST
On Monday, August 30, 2010, Peter Zijlstra wrote:
> On Mon, 2010-08-30 at 01:13 +0200, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.34 and 2.6.35.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.34 and 2.6.35. Please verify if it still should
> > be listed and let the tracking team know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16399
> > Subject : perf failed with kernel 2.6.35-rc
> > Submitter : Zhang, Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx>
> > Date : 2010-07-13 8:14 (48 days old)
> > First-Bad-Commit: http://git.kernel.org/linus/1ac62cfff252fb668405ef3398a1fa7f4a0d6d15
> > Message-ID : <1279008849.2096.913.camel@xxxxxxxxxxxxxxxxxxxx>
> > References : http://marc.info/?l=linux-kernel&m=127900880212470&w=2
> >
> >
>
> Should be fixed by:
>
> commit 351af0725e5222e35741011d1ea62215c1ed06db
> Author: Zhang, Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx>
> Date: Fri Aug 6 13:39:08 2010 +0800
>
> perf, x86: Fix Intel-nhm PMU programming errata workaround
>
> Fix the Errata AAK100/AAP53/BD53 workaround, the officialy documented
> workaround we implemented in:
>
> 11164cd: perf, x86: Add Nehelem PMU programming errata workaround
>
> doesn't actually work fully and causes a stuck PMU state
> under load and non-functioning perf profiling.
>
> A functional workaround was found by trial & error.
>
> Affects all Nehalem-class Intel PMUs.
>
> Signed-off-by: Zhang Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> LKML-Reference: <1281073148.2125.63.camel@xxxxxxxxxxxxxxxxxxxx>
> Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxx> # .35.x
> Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Thanks, closed.
Rafael
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