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Subject: Re: [PATCH] perf_events: fix bogus warn_on(_once) in 
 perf_prepare_sample()
From: Peter Zijlstra <peterz@infradead.org>
To: Stephane Eranian <eranian@google.com>
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Date: Thu, 08 Apr 2010 23:24:20 +0200
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On Thu, 2010-04-08 at 23:18 +0200, Stephane Eranian wrote:
> I am not sure I understand what you mean by buffered PEBS. Are you talking
> about using PEBS buffer bigger than one entry?

Yep.

> If so, how can you do:
>   - the LBR based fixups for multiple samples (on PMU interrupt)

Not, so it would be the offset on.

>   - attribute PID/TID in system-wide mode

flush on context switches.