Re: cpu hotplug support broken in 2.6.23-rc3

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > Can you try 20-or-so tests? Mine hangs randomly, so it survived 4 or
> > so cycles at one point.
> 
> Mine still survives with this ... with sleep 1 ...
> 
> # for((i=0; i<100; i++)); do echo $i; echo $((i % 2))
> >/sys/devices/system/cpu/cpu1/online; sleep 1; done
> 
> and this as well ... without sleep ...
> 
> # for((i=0; i<100; i++)); do echo $i; echo $((i % 2))
> >/sys/devices/system/cpu/cpu1/online; done
> 
> I'm on reiserfs. gcc 3.4.5. Config sent to you seperately so as not to
> cloud lkml. If anyone wants the config, please let me know. Is mime
> "attachment" acceptable now on lkml?

Ok, so it gets weirder. I have now machine in "hung" state; other
consoles still work, but there are no timers -  sleep 1 hangs forever.

sysrq-t shows kstopmachine hung in hrtimer_try_to_cancel.

So I indeed suspect difference-in-kconfig to trigger this, and will
try disabling noidlehz.
								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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