Maciej Soltysiak wrote:
>>>>Con,
>>>>
>>>>I have been using SCHED_BATCH on two machines now with expected
>>>>results. So this you might consider this as another success report :-)
>>>
>>>Great. Thanks for the report. I too use them all day every day on each
>>>machine I have with distributed computing clients so they're pretty well
>>>tested.
> 
> I forgot to mention about something.
> 
> I totally deadlocked my machine just after setting the
> /proc/sys/kernel/compute to 1 with
> # echo 1 > /proc/sys/kernel/computer
> 
> 
> The machine is 2x1G p3, and the kernel was SMP and I had experimentally
> seti@home running in SCHED_BATCH mode in screen.
> 
> It was 2.6.8-rc1 with ck patches from:
> http://ck.kolivas.org/patches/2.6/2.6.7/2.6.8-rc1/
> 
> I used these patches on 2.6.8-rc1 from it (of course in the proper
> order:
> __cleanup_transaction-latency-fix.patch
> crq-fixes.diff
> defaultcfq.diff
> filemap_sync-latency-fix.patch
> from_2.6.8-rc1_to_staircase7.A

Sorry, those were snapshot patches and not "release" patches. That bug 
was known and fixed in staircase 7.E which was released with 2.6.7-ck6; 
2.6.8-rc2-mm2 did not have that bug either.

Cheers,
Con