Bug#270204: marked as done (kernel-image-2.6-k7: oprofile causes segfaults and oopses)
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>From peter@llama.cordes.ca Sun Sep 05 23:23:06 2004
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Date: Mon, 06 Sep 2004 03:22:35 -0300
From: Peter Cordes <peter@cordes.ca>
Subject: kernel-image-2.6-k7: oprofile causes segfaults and oopses
Sender: Peter Cordes <peter@llama.cordes.ca>
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Package: kernel-image-2.6.8-1-k7
Version: 2.6.8-2
Severity: normal
Using oprofile (running opcontrol --start) makes the system unstable[1]
when running a Debian kernel. I first noticed this with a 2.6.7 kernel I
compiled myself (from Debian sources), so I upgraded to 2.6.8-1-k7, where I
observed the same symptoms. A vanilla (kernel.org tarball) kernel built
with very nearly the same config options produces none of these symptoms
even with oprofile collecting data. When I'm not using oprofile, the system
is rock solid stable. (memtest86+ and cpuburn don't report any errors, etc.)
Oh, I think I used gcc 3.4 to build the vanilla 2.6.8 kernel, but probably
not for the 2.6.7 that had the same oprofile problems. If it's a gcc thing,
that would explain it. I was going to report this as a bug against the
kernel-source package, but it might well not be Debian's patches that are at
fault. I am sure that the 2.6 kernels Debian distributes crash when I use
oprofile. If you can't reproduce this with kernel-image-2.6.8-1-k7, I'll
try to do some more narrowing down. I don't have time to use kdb/kgdb to
actually find the problem myself, though :(
All my testing related to this has been on an Athlon tbird running Sarge.
[1] instability includes segfaults, errors, and oopses all over the place.
e.g. when doing tar xjf kernel-source-2.6.8.tar.bz2, it doesn't complete
because bzip2 or tar finds an error in the data they're processing. mozilla
can barely start without segfaulting.
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.8-vanilla
Locale: LANG=C, LC_CTYPE=C
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Received: (at 270204-done) by bugs.debian.org; 17 Oct 2004 22:29:48 +0000
>From dilinger@voxel.net Sun Oct 17 15:29:48 2004
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Subject: hardware problems
From: Andres Salomon <dilinger@voxel.net>
To: 270204-done@bugs.debian.org
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Reporter has indicated this bug is due to bad RAM. Closing..
--=20
Andres Salomon <dilinger@voxel.net>
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