linux-kernel - Re: [PATCH] perf, x86: Optimize intel_pmu_pebs_fixup

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Message-ID: <20131017150358.GN227855@redhat.com>
Date:	Thu, 17 Oct 2013 11:03:58 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	dave.hansen@...ux.intel.com, eranian@...gle.com,
	ak@...ux.intel.com, jmario@...hat.com,
	linux-kernel@...r.kernel.org, acme@...radead.org, mingo@...nel.org
Subject: Re: [PATCH] perf, x86: Optimize intel_pmu_pebs_fixup_ip()

On Thu, Oct 17, 2013 at 04:51:31PM +0200, Peter Zijlstra wrote:
> On Thu, Oct 17, 2013 at 10:49:13AM -0400, Don Zickus wrote:
> > For some reason this patch is page faulting at an invalid address inside
> > __intel_pmu_pebs_event().
> 
> Ah yes, I lost a refresh, but read on; I've send a gazillion new emails
> since ;-)

Yes, I have noticed, but I got worried when you labeled some of them with
'untested'. :-)  Thought I would stick to something a little more close to
working.

> 
> I think it was something like: s/this_cpu_ptr/this_cpu_read/ to make it
> work again.

Thanks.  I will try some of the other pieces today (unlike yesterday).

Cheers,
Don

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