linux-kernel - Re: [PATCH v2] perf: fix assertion failure in x86_pmu

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Date:	Tue, 07 Feb 2012 15:36:13 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	markus@...ppelsdorf.de, paulus@...ba.org
Subject: Re: [PATCH v2] perf: fix assertion failure in x86_pmu_start()

Le mardi 07 février 2012 à 14:39 +0100, Stephane Eranian a écrit :
> The following patch fixes an issue introduced by the following
> commit:
>         e050e3f0a71b ("perf: Fix broken interrupt rate throttling")
> 
> The patch caused the following warning to pop up depending on
> the sampling frequency adjustments:
> 
...

> 
> In this second version, we've added calls to disable/enable PMU during
> unthrottling or frequency adjustment based on bug report of spurious
> NMI interrupts from Eric Dumazet.
> 
> Signed-off-by: Stephane Eranian <eranian@...gle.com>
> ---

I tested successfully this patch on my two dev machines, thanks for
fixing this Stephane.

Reported-and-tested-by: Eric Dumazet <eric.dumazet@...il.com>



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