cvs commit: src/sys/kern sched_ule.c

John Baldwin jhb at
Wed Jul 7 08:35:23 PDT 2004

On Tuesday 06 July 2004 01:57 am, Robert Watson wrote:
> rwatson     2004-07-06 05:57:30 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/kern             sched_ule.c
>   Log:
>   Temporarily disable preemption in SCHED_ULE due to reported panics and
>   hangs due to recent preemption changes.  This change appears to remove
>   the panic that I was running into, but at the cost of increasing
>   ithread scheduling latency, and as such is a temporary band-aid until
>   jhb has a chance to resolve the ule<->preemption interaction that is
>   the source of the problem.  If it doesn't fix the problem for others--
>   sorry!

It it just broken on SMP?  I actually did the commit from a UP preemption 
kernel using SCHED_ULE from within X11 with KDE, etc. running.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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