panic: sched_priority: invalid priority 2906: nice 0,
ticks 122865664 ftick 516947 ltick 517947 tick pri 2726
Alexander Motin
mav at FreeBSD.org
Mon Nov 29 22:02:06 UTC 2010
On 29.11.2010 23:47, Giovanni Trematerra wrote:
> I got it on QEMU and assumed that QEMU was not doing a proper job of
> distributing run-time amongst cores (so VirtualBox???).
> I figured out that sched_tick is being passed a huge number of ticks elapsed
> for the cpu at startup, in my case, by hardclock_anycpu (kern_clock.c).
Problem with many ticks at CPU startup should be fixed by r214987.
> I haven't a patch only a dirty hack just to make sure we won't be
> running for more than 5s solid, if we have a huge number of ticks in
> input to sched_tick, which is something that ULE can still handle.
>
> Hope this helps.
>
> diff -r d16464301129 sys/kern/kern_clock.c
> --- a/sys/kern/kern_clock.c Thu Sep 23 11:56:35 2010 -0400
> +++ b/sys/kern/kern_clock.c Sun Oct 03 17:53:39 2010 -0400
> @@ -525,7 +525,7 @@ hardclock_anycpu(int cnt, int usermode)
> PROC_SUNLOCK(p);
> }
> thread_lock(td);
> - sched_tick(cnt);
> + sched_tick((cnt< (hz*10)/2) ? cnt : (hz*10)/2);
> td->td_flags |= flags;
> thread_unlock(td);
>
> --
> Giovanni Trematerra
--
Alexander Motin
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