Re: [BUG] fault while using perf callchains in sparc64

From: Frederic Weisbecker
Date: Thu Apr 01 2010 - 04:06:54 EST

On Mon, Mar 29, 2010 at 03:32:08PM -0700, David Miller wrote:
> From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> Date: Tue, 30 Mar 2010 00:21:34 +0200
> > $ ldd /usr/bin/as
> > => /usr/lib/ (0xf7ec4000)
> > => /usr/lib/ (0xf7e14000)
> > => /lib/ (0xf7ca0000)
> > /lib/ (0xf7efc000)
> Ok, same here.
> > The last kernel I know that don't have such problems is 2.6.31-rc6
> > May be I should bisect?
> Hmmm, since you know a good and bad point, yes a bisect
> might be the best way to proceed here.
> It might be quicker if you first test 2.6.32 and 2.6.33
> and then use the results of that to guide your bisect.
> Anyways, if you narrow it down to a commit I should be
> able to fix this quickly.
> Thanks!

I actually can't. It works well on a backup 2.6.31-rc6 kernel
but when I build a new one of this same version, the problem
happens again. And I don't have the config of the one that works
(and no /proc/config.gz as well).

So I suspect this is something that happens with some specific
configs only.

Anyway, once I get more clues about this, I'll tell you.


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