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Subject[patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-1

* Lee Revell <rlrevell@joe-job.com> wrote:

> > i only tried the !PREEMPT version though - does that one work for you?
>
> Yup, !PREEMPT works fine. Testing PREEMPT next. So far only
> PREEMPT_VOLUNTARY fails to boot.

found a bug that causes !PREEMPT boot failures. The seqlock type was
wrong for the !RT case, resulting in a subtle bug:
write_seqlock_irqsave() didnt actually disable interrupts. This results
in a deadlock scenario in where the timer interrupt interrupts
update_times (which runs in softirq context). I've uploaded the -31-1
patch with this fix included to the usual place:

http://redhat.com/~mingo/realtime-preempt/

i'm cycling through the various options, but it's looking good so far,
PREEMPT_NONE, PREEMPT_VOLUNTARY and PREEMPT_DESKTOP all booted up fine.

Ingo
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