linux-kernel - Re: [rfc] x86,perf: P4 PMU -- use hash for p4_get_escr

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Date:	Tue, 11 May 2010 11:09:53 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [rfc] x86,perf: P4 PMU -- use hash for p4_get_escr_idx

On Tuesday, May 11, 2010, Lin Ming <ming.m.lin@...el.com> wrote:
> On Tue, 2010-05-11 at 14:47 +0800, Lin Ming wrote:
>> On Tue, 2010-05-11 at 14:41 +0800, Ingo Molnar wrote:
>> > * Ingo Molnar <mingo@...e.hu> wrote:
>> >
>> > >
>> > > * Lin Ming <ming.m.lin@...el.com> wrote:
>> > >
>> > > > On Mon, 2010-05-10 at 23:27 +0800, Cyrill Gorcunov wrote:
>> > > > > Hi Ming,
>> > > > >
>> > > > > could you give this patch a shot if possible? Compile
>> > > > > tested only. I would appreciate review and complains
>> > > > > as well :) I know you're busy with other perf task
>> > > > > so there is no hurry. Just to share the patch as early
>> > > > > as possible.
>> > > >
>> > > > Hi,
>> > > >
>> > > > I'm going to test this patch, but current tip/master(c6661c5) seems has
>> > > > problem.
>> > >
>> > > Does reverting 4fd38e4595e2f6c9d27732c042a0e16b2753049c help?
>> >
>> > If not then it would be nice if you could try to do a bisection.
>>
>> Yes, it's the commit 4fd38e45 causes the regression.
>
> Cyrill,
>
> After reverting commit 4fd38e45, this patch works well.
>
> Lin Ming
>
>
thanks a lot Ming, Ingo dont apply it yet, i will make it using warn
instead of bugon.
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