On 29.11.2010 17:07, John Baldwin wrote:
On Friday, November 26, 2010 4:38:49 pm David Rhodus wrote:
I hit this panic on my NFS server.
-DR
coke.fun dumped core - see /var/crash/vmcore.2
Fri Nov 26 14:50:48 UTC 2010
FreeBSD coke.fun 9.0-CURRENT FreeBSD 9.0-CURRENT #14 r215800: Wed Nov
24 12:35:30 UTC 2010 [email protected]:/usr/obj/usr/src/sys/GENERIC
i386
panic: sched_priority: invalid priority 2906: nice 0, ticks 122865664
ftick 516947 ltick 517947 tick pri 2726
I ran the numbers and assuming a hz of 1000, this requires you to have a very
large value for ts_ticks (about (2726 * 24)<< 10). I suspect this is due to
sched_tick() being invoked for a long idle sleep combined with the eventtimer
changes. Can you go to frame 10 and 'p td->td_sched->ts_ticks'?
As I can see, this is VirtualBox virtual machine. So it is still a
question what side makes so large hole in sched_tick() on some CPUs. It
could be interesting to get ktr(4) dump with KTR_SPARE2 mask:
options KTR
options ALQ
options KTR_ALQ
options KTR_ENTRIES=131072
options KTR_COMPILE=(KTR_SPARE2)
options KTR_MASK=(KTR_SPARE2)
--
Alexander Motin
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