linux-kernel - Re: [tip:perf/urgent] perf, x86: Catch spurious interrupts after disabling counters

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Message-ID: <20100929150140.GK13563@erda.amd.com>
Date:	Wed, 29 Sep 2010 17:01:40 +0200
From:	Robert Richter <robert.richter@....com>
To:	Stephane Eranian <eranian@...gle.com>
CC:	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"yinghai@...nel.org" <yinghai@...nel.org>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"gorcunov@...il.com" <gorcunov@...il.com>,
	"ying.huang@...el.com" <ying.huang@...el.com>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"ming.m.lin@...el.com" <ming.m.lin@...el.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"dzickus@...hat.com" <dzickus@...hat.com>,
	"mingo@...e.hu" <mingo@...e.hu>
Subject: Re: [tip:perf/urgent] perf, x86: Catch spurious interrupts after
 disabling counters

On 29.09.10 09:28:56, Stephane Eranian wrote:
> On Wed, Sep 29, 2010 at 3:13 PM, Stephane Eranian <eranian@...gle.com> wrote:
> > On Wed, Sep 29, 2010 at 2:54 PM, Robert Richter <robert.richter@....com> wrote:
> >> On 29.09.10 14:53:01, Robert Richter wrote:
> >>> Stephane,
> >>>
> >>> On 29.09.10 08:26:41, Stephane Eranian wrote:
> >>> > You've applied the fix only to the generic X86 interrupt handler
> >>> > which is currently used by AMD64 processors.
> >>>
> >>> (... and P4).
> >>>

> Well, in tip-x86, I don't see your fix in p4_pmu_handle_irq(). Is
> that pending?

Right, I wasn't remembering correctly, it was P6 and core. And yes, P4
requires the fix. Will send a patch for this.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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