Re: 2.5.70 (virgin) hangs running SDET

[Martin J. Bligh]

>> OK, did that. your patches + debug up the wazoo. Bugger all output,
>>  and a hang that looks similar, but the culprit is hiding even more,
>>  as far as I can't see ;-(
> 
> yes, nobody's spinning on the /proc lock any more.
> 
> I don't understand why all the tasks in set_cpus_allowed() are showing up
> as being in " R " state.  Possibly the wait_for_completion() in there is
> stack gunk and they're really spinning on the runqueue lock?

Damn it, we really need this shit to use frame pointers, and give accurate
info ;-(
 
> You haven't tried disabling sched_migrate_task() yet?

Nope, will do that next, but I presume you mean balance on exec, from
previous conversations ... 

Thanks,

M.