Messages in this thread | | | From | Paweł Sikora <> | Subject | Re: [3.6.6] panic on reboot / khungtaskd blocked? (WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule) | Date | Mon, 12 Nov 2012 13:33:39 +0100 |
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On Monday 12 of November 2012 11:22:47 Paweł Sikora wrote: > On Monday 12 of November 2012 15:40:31 Michael Wang wrote: > > On 11/12/2012 03:16 PM, Paweł Sikora wrote: > > > On Monday 12 of November 2012 11:04:12 Michael Wang wrote: > > >> On 11/09/2012 09:48 PM, Paweł Sikora wrote: > > >>> Hi, > > >>> > > >>> during playing with new ups i've caught an nice oops on reboot: > > >>> > > >>> http://imgbin.org/index.php?page=image&id=10253 > > >>> > > >>> probably the upstream is also affected. > > >> > > >> Hi, Paweł > > >> > > >> Are you using a clean 3.6.6 without any modify? > > > > > > yes, pure 3.6.6 form git tree with modular config. > > > > > >> Looks like some threads has set itself to be UNINTERRUPTIBLE with out > > >> any design on switch itself back later(or the time is too long), are you > > >> accidentally using some bad designed module? > > > > > > hmm, hard to say. mostly all modules are loaded automatically by kernel. > > > > Could you please provide the whole dmesg in text? your picture lost the > > print info of the hung task. > > i've grabbed the console via rs232 but there's no more info (see attached txt).
hmm, i have one observation.
during rc.shutdown there're messages on console like this: Cannot stat file /proc/$pid/fd/1: Connection timed out afaics this file descriptor points to vnc log file on a remote machine, e.g.:
# ps aux|grep xfwm4 eda 1748 0.0 0.0 320220 11224 ? S 13:08 0:00 xfwm4
# readlink -m /proc/1748/fd/1 /remote/dragon/ahome/eda/.vnc/odra:11.log
# mount|grep ahome dragon:/home/users/ on /remote/dragon/ahome type nfs (rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,soft,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.0.2.121,mountvers=3,mountport=45251,mountproto=udp,local_lock=none,addr=10.0.2.121)
so, probably during `killall5 -TERM/-KILL` on shutdown stage something sometimes go wrong and these processes (xfce4/vncserver) survive the signal and hang on the nfs i/o.
BR, Paweł.
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