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Re: CONFIG_PREEMPT causes corruption of application's FPU stack
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From:
<j.mell@...>
To: Steven Rostedt <rostedt@...>
Cc: <linux-kernel@...>
Subject:
Re: CONFIG_PREEMPT causes corruption of application's FPU stack
Date: Saturday, May 24, 2008 - 2:52 pm
On Sonday, 18. May 2008, you wrote:
quoted text
> > 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.
quoted text
> > If you see it in the kernel.org kernel, can you please do a git-bisect > > to see which commit caused the problem?
quoted text
> This is a bit of a problem. I do not know whether there was *ever* a > kernel version with CONFIG_PREEMPT and without this problem as I have > not tried any older kernel version yet. I will go back to SUSE 10.2 and > try the 2.6.18 kernel that comes with it.
I found now that the problem was introduced somewhere between the kernel.org kernels 2.6.19.7 and 2.6.20. I will start bisecting now. Bye, Jürgen --
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