linux-kernel - Re: [PATCH 4/6] perf: Fix hw breakpoints overflow period sampling

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Message-ID: <1365091846.2609.96.camel@laptop>
Date:	Thu, 04 Apr 2013 18:10:46 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 4/6] perf: Fix hw breakpoints overflow period sampling

On Sun, 2013-03-10 at 19:41 +0100, Jiri Olsa wrote:
> The hw breakpoint pmu 'add' function is missing the
> period_left update needed for SW events.
> 
> The perf HW breakpoint events use SW events framework
> for to process the overflow, so it needs to be properly
> initialized during PMU 'add' method.

Yeah looks about right.. 

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