linux-kernel - Re: [PATCH 01/10] perf,x86: Fix event/group validation

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Message-ID: <1432214957.30671.0.camel@twins>
Date:	Thu, 21 May 2015 15:29:17 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	Jiri Olsa <jolsa@...hat.com>,
	"Liang, Kan" <kan.liang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Hunter <ahh@...gle.com>,
	Maria Dimakopoulou <maria.n.dimakopoulou@...il.com>
Subject: Re: [PATCH 01/10] perf,x86: Fix event/group validation

On Thu, 2015-05-21 at 06:27 -0700, Stephane Eranian wrote:
> Or are you talking about a preemption while executing x86_schedule_events()?

That.

And we can of course cure that by an earlier patch I send; but I find it
a much simpler rule to just never allow modifying global state for
validation.
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