linux-kernel - Re: [PATCH] perf_events: improve Intel event scheduling

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Date:	Thu, 07 Jan 2010 09:54:45 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	Stephane Eranian <eranian@...gle.com>, eranian@...il.com,
	linux-kernel@...r.kernel.org, mingo@...e.hu,
	perfmon2-devel@...ts.sf.net,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] perf_events: improve Intel event scheduling

On Thu, 2010-01-07 at 15:13 +1100, Paul Mackerras wrote:
> 
> On powerpc, the pmu->enable() function always stops the PMU if it
> wasn't already stopped.  

I just looked at the generic code and it looks like kernel/perf_event.c
always calls perf_disable() before calling ->enable().



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