Turn off preemption on the Alpha for the time being. Peter and JHB aren't

sure when things got so bad (JHB says preemption worked just fine for months
before the AlbertVM commit).  Even post DillionVM locking commit, Miatas
(DEC Personal Workstations) are very fragile -- not making it thru a world
build.  With this patch it does.

Those hacking on SMPng will want to locally back out this commit.  The rest
of us will want to run with it until the SMPng guys figure out the problem(s).

Submitted by:	peter

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/alpha/alpha/interrupt.c b/sys/alpha/alpha/interrupt.c
index d82601e..489c948 100644
--- a/sys/alpha/alpha/interrupt.c
+++ b/sys/alpha/alpha/interrupt.c
@@ -444,7 +444,7 @@ alpha_dispatch_intr(void *frame, unsigned long vector)
 		    "alpha_dispatch_intr: disabling vector 0x%x", i->vector);
 		ithd->it_disable(ithd->it_vector);
 	}
-	error = ithread_schedule(ithd, !cold);
+	error = ithread_schedule(ithd, 0);	/* XXX:no preemption for now */
 	KASSERT(error == 0, ("got an impossible stray interrupt"));
 }