Messages in this thread | | | Date | Sun, 18 May 2008 11:07:33 -0400 | From | Steven Rostedt <> | Subject | Re: CONFIG_PREEMPT causes corruption of application's FPU stack |
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On Sat, May 17, 2008 at 06:31:08PM +0200, J?rgen Mell wrote: > > I tracked this down to a single kernel configuration option. If > CONFIG_PREEMPT is set to 'y' the application will start crashing. If > CONFIG_PREEMPT is replaced by CONFIG_PREEMPT_VOLUNTARY, the application > will run without errors. > > The problem is reproducible in so far as the error always occurs when > CONFIG_PREEMPT is set, but the time to the first occurrence varies greatly > from some minutes up to more than 10 CPU hours. > > I found this error first on an openSUSE kernel 2.6.22.17-0.1-rt. I verified > the problem on the following kernel versions: > > openSUSE 2.6.22.17-0.1-default > openSUSE 2.6.23.17-ccj64-rt > kernel.org 2.6.26-rc1 > kernel.org 2.6.26-rc2-git5
So you see this error in both the SuSE RT kernel, *and* mainline kernel.org?
If you see it in the kernel.org kernel, can you please do a git-bisect to see which commit caused the problem?
Thanks,
-- Steve
> > My CPU is an Intel Core2Duo 6420, running two of the Einstein applications > in 32-bit mode. From a discussion on the Einstein message boards I know > that other user of the application are also affected. >
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