From: Andi Kleen <ak@suse.de>
To: eranian@hpl.hp.com
Cc: linux-kernel@vger.kernel.org, "S. P. Prasanna" <prasanna@in.ibm.com>
Subject: Re: [PATCH 10/18] 2.6.17.9 perfmon2 patch for review: PMU context switch support
Date: Fri, 25 Aug 2006 15:17:30 +0200 [thread overview]
Message-ID: <200608251517.30479.ak@suse.de> (raw)
In-Reply-To: <20060825125633.GE5330@frankl.hpl.hp.com>
On Friday 25 August 2006 14:56, Stephane Eranian wrote:
> On Fri, Aug 25, 2006 at 02:20:31PM +0200, Andi Kleen wrote:
> > On Friday 25 August 2006 13:56, Stephane Eranian wrote:
> >
> > > > I suppose some of those functions must be marked __kprobes
> > > >
> > > Are there any guidelines as to why some functions must be ignored
> > > by kprobes? I assume if meaans they cannot be instrumented.
> >
> > It does yes.
> >
> > In general anything that could cause kprobes to recurse is forbidden.
>
> In the case of the PMU context switch, are you saying that you may
> context switch as a consequence of hitting a (K)probe?
I hope not, but at least the current __switch_to is marked __kprobes
and I assume there was some reason for it and it will likely apply
to callees too. For details ask Prasanna (cc'ed).
-Andi
next prev parent reply other threads:[~2006-08-25 13:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-23 8:06 [PATCH 10/18] 2.6.17.9 perfmon2 patch for review: PMU context switch support Stephane Eranian
2006-08-23 10:29 ` Andi Kleen
2006-08-25 11:56 ` Stephane Eranian
2006-08-25 12:20 ` Andi Kleen
2006-08-25 12:56 ` Stephane Eranian
2006-08-25 13:17 ` Andi Kleen [this message]
2006-08-23 22:57 ` Andrew Morton
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=200608251517.30479.ak@suse.de \
--to=ak@suse.de \
--cc=eranian@hpl.hp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=prasanna@in.ibm.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.