linux-kernel - Re: [PATCH] powerpc TLF_RESTORE

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Date:	Thu, 10 Apr 2008 18:36:35 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Paul Mackerras <paulus@...ba.org>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH] powerpc TLF_RESTORE_SIGMASK

> This crashes my powerpc mac g5.

It worked fine on mine.

> It happens after the boot, during the first login-over-ssh.

Mine did lots of stuff fine.

> This is with most of the rest of the -mm poopile applied.  i386 and x86_64
> seem OK.

I had only tested with Linus's tree plus the small handful of post-2.6.25
cleanup patches I've posted in the last few weeks.  To be precise it was
9597362d354f8655ece324b01d0c640a0e99c077 plus several of my cleanup patches
(that are probably all in -mm, but I'm not sure off hand).

I'd rebased my tree today to 783e391b7b5b273cd20856d8f6f4878da8ec31b3
anyway.  I just tried the new kernel with the sigmask cleanups and only 
a few other patches, and have no problems.

The details of your crash make it look pretty unrelated to this code.
Off hand I would guess that it's some other bug from other -mm patches
that just happens only to bite you on powerpc.  If the crash is not
intermittent and you bisected it to this one change, then I am at a
loss to see what might be happening.  I'd have to leave it to Paul et
al to figure out if there is some strange powerpc juju going on.

Thanks,
Roland
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