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Subject: Re: [RFC][PATCH 8/8] perf: Rework the PMU methods
From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: paulus <paulus@samba.org>, stephane eranian <eranian@googlemail.com>,
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Date: Tue, 22 Jun 2010 19:10:22 +0200
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On Tue, 2010-06-22 at 18:26 +0200, Frederic Weisbecker wrote:
> > > It would be nice to have a PERF_EF_STOP as well in ->del, so that
> > > each pmu don't need to maintain an internal state.
> > 
> > You have to track it since we can stop the thing outselves without the
> > caller knowing.
> 
> 
> From the pmu internals yeah, that's what the x86 pmu does. But otherwise, other
> pmu don't do such things. 

Everybody who does throttling will have to.