linux-kernel - Re: [PATCH] perf: fix assertion failure in x86_pmu

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Message-ID: <20120207113646.GA2025@elte.hu>
Date:	Tue, 7 Feb 2012 12:36:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	markus@...ppelsdorf.de, paulus@...ba.org
Subject: Re: [PATCH] perf: fix assertion failure in x86_pmu_start()


* Stephane Eranian <eranian@...gle.com> wrote:

> > This was already discussed last year.
> >
> > https://lkml.org/lkml/2011/3/24/552
> >
> > Apparently all HP blades I have in my labs have the problem, 
> > whatever option is chosen in BIOS.
> >
> > On my machines, I set the BIOS to 'High performance', and 
> > cpus are on highest available frequencies.
>
> Yeah, it's an old problem (> 4years). And if I recall 
> correctly, there is no option in the BIOS to turn it off. 
> You'd have to talk to HP directly.

That's most likely unrelated to the regression at hand though.

Thanks,

	Ingo
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