cvs commit: src/sys/kern sched_ule.c

Gleb Smirnoff glebius at cell.sick.ru
Wed Jul 7 08:53:51 PDT 2004


  John,

On Wed, Jul 07, 2004 at 11:36:31AM -0400, John Baldwin wrote:
J> >   Modified files:
J> >     sys/kern             sched_ule.c
J> >   Log:
J> >   Temporarily disable preemption in SCHED_ULE due to reported panics and
J> >   hangs due to recent preemption changes.  This change appears to remove
J> >   the panic that I was running into, but at the cost of increasing
J> >   ithread scheduling latency, and as such is a temporary band-aid until
J> >   jhb has a chance to resolve the ule<->preemption interaction that is
J> >   the source of the problem.  If it doesn't fix the problem for others--
J> >   sorry!
J> 
J> It it just broken on SMP?  I actually did the commit from a UP preemption 
J> kernel using SCHED_ULE from within X11 with KDE, etc. running.

it is broken on UP, too. See thread in -current.

-- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE


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