Hi Thomas,
On 20/05/07, Thomas Gleixner <[email protected]> wrote:
On Sun, 2007-05-20 at 02:53 +0530, Anant Nitya wrote:
> > 1 == TASK_INTERRUPTIBLE, so we know that ksoftirqd was not woken up. At
> > least it is not a scheduler problem.
> >
> > I work out a more complex debug patch and pester you to test once I'm
> > done.
> No problem :)
You asked for it :)
Please patch 2.6.22-rc2 with
http://tglx.de/projects/hrtimers/2.6.22-rc2/patch-2.6.22-rc2-hrt2.patch
and
http://www.tglx.de/private/tglx/ht-debug/tracer.diff
Compile it with the config
http://www.tglx.de/private/tglx/ht-debug/config.debug
You should find something like:
( swapper-0 |#0): new 67173 us user-latency.
along with the familiar "NOHZ ......" message in your log file.
Once that happened please do:
$ cat /proc/latency_trace >trace.txt
compress it and send it to me along with the full dmesg output or put
both up to some place, where I can download it.
Michal,
IIRC you encountered the same P4/HT related wreckage. Can you do the
same ?
Good news - I can't reproduce this bug. It's time to remove
"Subject : 2.6.21-git4 BUG: soft lockup detected on CPU#1!
References : http://lkml.org/lkml/2007/5/2/511
Submitter : Michal Piotrowski <[email protected]>
Handled-By : Thomas Gleixner <[email protected]>
Status : problem is being debugged"
from KR.
Bad news - I hit a bug in 2.6.22-rc2-hrt3. Bug symptoms:
- X hangs (keyboard, mouse, sound etc.)
- only Magic SysRq works
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.22-rc2-hrt3/hrt-config
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.22-rc2-hrt3/hrt-console.log
Now I'm trying to apply hrtimers debug patch ontop 2.6.22-rc2-hrt3
http://lkml.org/lkml/2007/3/23/106
Regards,
Michal
--
Michal K. K. Piotrowski
Kernel Monkeys
(http://kernel.wikidot.com/start)
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