Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-R0

[Ingo Molnar]

* K.R. Foley <kr@xxxxxxxxxx> wrote:

> Managed to hang the system again under heavy load. This time with the
> above patch:
> 
> http://www.cybsft.com/testresults/crashes/2.6.9-rc1-bk4-R0.txt
> 
> Last time was with Q7:
> 
> http://www.cybsft.com/testresults/crashes/2.6.9-rc1-bk4-Q7.txt

seems to be the same thing - an unbalanced preemption count, possibly
due to some locking error. Unfortunately the assert catches the
imbalance only at exit time. (it's unlikely that the do_exit() code is
buggy.)

i'll add a new feature to debug this: when crashing on an assert and
tracing is enabled the trace leading up to the crash will be printed to
the console. How did you capture the crash - was it in the syslog or do
you have serial logging? Maybe this is not the real crash but only a
followup crash?

	Ingo
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