linux-kernel - Re: [PATCH 1/2] perf: fix PERF_EVENT_IOC

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Message-ID: <alpine.DEB.2.10.1311271013590.4569@vincent-weaver-1.um.maine.edu>
Date:	Wed, 27 Nov 2013 10:15:02 -0500 (EST)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Will Deacon <will.deacon@....com>
cc:	linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 1/2] perf: fix PERF_EVENT_IOC_PERIOD to force-reset the
 period

On Wed, 27 Nov 2013, Will Deacon wrote:

> Vince Weaver reports that, on all architectures apart from ARM,
> PERF_EVENT_IOC_PERIOD doesn't actually update the period until the next
> event fires. This is counter-intuitive behaviour and is better dealt
> with in the core code.

To be fair, it was Andreas Sandberg <andreas.sandberg@...uu.se>
who noticed this issue and reported it to me (in the context of 
the manpage being wrong).  I just passed it on to the linux-kernel list.

Vince
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