Messages in this thread | | | Date | Sat, 27 Nov 2010 00:34:39 -0500 | Subject | Re: Possible FPU context corruption w/ CONFIG_PREEMPT | From | Brian Gerst <> |
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On Fri, Nov 26, 2010 at 10:31 AM, Tejun Heo <tj@kernel.org> wrote: > 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. >
This might be fixed by commit a4d4fbc7735bba6654b20f859135f9d3f8fe7f76 (Disable preemption when using TS_USEDFPU).
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