linux-kernel - Re: [RFC PATCH] perf: Add load latency monitoring on Intel Nehalem/Westmere

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Date:	Thu, 23 Dec 2010 08:35:39 +0100
From:	"Andi Kleen" <andi@...stfloor.org>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Peter Zijlstra" <peterz@...radead.org>,
	"Lin Ming" <ming.m.lin@...el.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Stephane Eranian" <eranian@...gle.com>,
	"Frederic Weisbecker" <fweisbec@...il.com>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"lkml" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] perf: Add load latency monitoring on Intel
 Nehalem/Westmere

>
> * Peter Zijlstra <peterz@...radead.org> wrote:
>
>> On Wed, 2010-12-22 at 09:33 +0100, Peter Zijlstra wrote:
>> > On Wed, 2010-12-22 at 16:12 +0800, Lin Ming wrote:
>> > > It's applied on top of tip/master(3ea1f4f89) and Andi's offcore
>> > > patchsets are needed.
>> >
>> > I still haven't gotten a version of that I'm willing to apply.
>>
>> That is, maybe you could pick up his patches and finish them, Andi
>> doesn't seem interested in getting them sorted.
>
> FYI, this one of Peter's reviews that went unaddressed:
>
>   https://lkml.org/lkml/2010/12/1/213
>
> and he got no reply to that feedback in the past 3 weeks. (There may be
> other issues
> outstanding, i have not checked.)

Sorry didn't see that email. I dropped the variable intentionally
to simplify the code; there is no fastpath overhead for the other
CPUs and allocating a few bytes per core didn't seem worth having a
special variable to guard it. I can readd it if people really
want it.

-Andi

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