From: Tejun Heo <tj@kernel.org>
To: lkml <linux-kernel@vger.kernel.org>,
Suresh Siddha <suresh.b.siddha@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Robert Richter <robert.richter@amd.com>,
Dan Carpenter <error27@gmail.com>, Avi Kivity <avi@redhat.com>,
Bernd Machenschalk <Bernd.Machenschalk@aei.mpg.de>,
Heinz-Bernd Eggenstein <hbeggenst@aol.com>,
Oliver Bock <oliver.bock@aei.mpg.de>,
the arch/x86 maintainers <x86@kernel.org>
Subject: Possible FPU context corruption w/ CONFIG_PREEMPT
Date: Fri, 26 Nov 2010 16:31:06 +0100 [thread overview]
Message-ID: <4CEFD2BA.5090403@kernel.org> (raw)
Hello, guys.
Heinz-Bernd Eggenstein reports a possible FPU context corruption w/
CONFIG_PREEMPT. Please take a look at the following forum post.
http://einstein.phys.uwm.edu/forum_thread.php?id=8516
openSUSE 11.3 desktop kernel which has CONFIG_PREEMPT set is
triggering SIGFPE while the default kernel w/o preemption works fine.
He also notes that a similar bug was fixed in 2008 by commit 06c38d5e
(x86-64: fix FPU corruption with signals and preemption) from Suresh.
Does it ring anyone's bell?
Heinz, is there a simple procedure to reproduce the problem, or would
it be possible to lure you into bisection?
Thanks.
--
tejun
next reply other threads:[~2010-11-26 15:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-26 15:31 Tejun Heo [this message]
2010-11-27 5:34 ` Possible FPU context corruption w/ CONFIG_PREEMPT Brian Gerst
2010-11-27 10:18 ` Tejun Heo
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