linux-kernel - Re: [RFC Patch 0/4] Enhance perf-events to profile memory accesses using hw-breakpoints

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Date:	Mon, 2 Nov 2009 16:05:04 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [RFC Patch 0/4] Enhance perf-events to profile memory accesses
	using hw-breakpoints - ver II


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> Well this ascii art should be a bit more complicated actually. But 
> anyway. Prasad's patchset is another branch of evolution of 
> tracing/hw-breakpoints.
>
> I've expressed my opinion about that in a mail yesterday. I basically 
> think it limits the perf events possibilities and rewrites the context 
> binding / register allocation that perf already handles.

Ok, in hindsight i agree with your point of view - we really dont want a 
duplicate layer but a single handler/arbitrer of hw-breakpoint state.

	Ingo
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