From: Peter Zijlstra <peterz@infradead.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, eranian@google.com,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 2/2] perf, x86: Don't allow unusual PEBS raw flags
Date: Thu, 2 May 2013 09:37:21 +0200 [thread overview]
Message-ID: <20130502073720.GH7521@dyad.programming.kicks-ass.net> (raw)
In-Reply-To: <1366844694-2770-2-git-send-email-andi@firstfloor.org>
On Wed, Apr 24, 2013 at 04:04:54PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> The PEBS documentation in the Intel SDM 18.6.1.1 states:
>
> """
> PEBS events are only valid when the following fields of IA32_PERFEVTSELx are all
> zero: AnyThread, Edge, Invert, CMask.
> """
>
> Since we had problems with this earlier, don't allow cmask, any, edge, invert
> as raw events, except for the ones explicitly listed as pebs_aliases.
If its a simple matter of crap in crap out without affecting anything else we
shouldn't do anything.
The only reason to interfere with the programming is if invalid programming can
affect others like with that MEM_*_RETIRED failure on ivb.
next prev parent reply other threads:[~2013-05-02 7:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 23:04 [PATCH 1/2] Fix perf LBR filtering Andi Kleen
2013-04-24 23:04 ` [PATCH 2/2] perf, x86: Don't allow unusual PEBS raw flags Andi Kleen
2013-04-29 22:16 ` Stephane Eranian
2013-04-29 22:34 ` Andi Kleen
2013-04-29 23:05 ` Stephane Eranian
2013-05-02 7:37 ` Peter Zijlstra [this message]
2013-05-06 17:44 ` Stephane Eranian
2013-05-06 18:52 ` Peter Zijlstra
2013-05-06 22:43 ` Stephane Eranian
2013-05-07 6:48 ` Ingo Molnar
2013-05-07 8:48 ` Peter Zijlstra
2013-05-07 11:04 ` Ingo Molnar
2013-05-07 8:43 ` Peter Zijlstra
2013-04-24 23:20 ` [PATCH 1/2] Fix perf LBR filtering Ben Hutchings
2013-04-24 23:24 ` Greg KH
2013-04-25 16:25 ` Peter Zijlstra
2013-04-25 16:41 ` Andi Kleen
2013-04-25 16:48 ` Peter Zijlstra
2013-04-25 17:00 ` Andi Kleen
2013-04-25 17:18 ` Peter Zijlstra
2013-04-25 17:42 ` Andi Kleen
2013-04-26 7:56 ` Peter Zijlstra
2013-04-26 19:46 ` Andi Kleen
2013-05-01 11:51 ` Ingo Molnar
2013-05-01 11:55 ` Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130502073720.GH7521@dyad.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=ak@linux.intel.com \
--cc=andi@firstfloor.org \
--cc=eranian@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox