Re: [PATCH 2.6.27-rc5 re-resubmit] Fix itimer/many thread hang.

[Frank Mayhar]

On Tue, 2008-09-23 at 17:59 +0400, Oleg Nesterov wrote:
> Looks like task_delta_exec() forgets to unlock rq.

Actually it shouldn't be locking rq.  I failed to delete the lock.

> Confused. Unless I misread the patch, tgtimes->totals can be NULL
> on UP too?

Yeah.  I totally messed up on this, too many things going on at once.
I've eliminated the SMP/UP split in sched_stats.h and pulled it all into
the three basic functions.

> (of course, this can't explain the crash)

I'll be investigating this in the morning (I'm at home today and without
a test box).
-- 
Frank Mayhar <fmayhar@xxxxxxxxxx>
Google, Inc.

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