The following reply was made to PR port-alpha/38335; it has been noted by GNATS.
From: "Michael L. Hitch" <
mhitch@...>
To:
gnats-bugs@...
Cc:
jarle@...
Subject: Re: port-alpha/38335 (kernel freeze on alpha MP system)
Date: Sun, 8 Nov 2009 21:34:34 -0700 (MST)
On Wed, 28 Oct 2009, Jarle Greipsland wrote:
> So, no cigar this time. Anything else I should try?
>
> -jarle
I've committed a fix to current that I think will fix this.
Index: sys/arch/alpha/alpha/pmap.c
===================================================================
RCS file: /cvsroot/src/sys/arch/alpha/alpha/pmap.c,v
retrieving revision 1.249
diff -u -p -r1.249 pmap.c
--- sys/arch/alpha/alpha/pmap.c 7 Nov 2009 07:27:40 -0000 1.249
+++ sys/arch/alpha/alpha/pmap.c 9 Nov 2009 04:21:12 -0000
@@ -3581,6 +3581,7 @@ pmap_tlb_shootdown(pmap_t pmap, vaddr_t
cpumask |= 1UL << ci->ci_cpuid;
pq = &pmap_tlb_shootdown_q[ci->ci_cpuid];
+ mutex_spin_enter(&pq->pq_lock);
/*
* Allocate a job.
@@ -3596,7 +3597,6 @@ pmap_tlb_shootdown(pmap_t pmap, vaddr_t
* If a global flush is already pending, we
* don't really have to do anything else.
*/
- mutex_spin_enter(&pq->pq_lock);
pq->pq_pte |= pte;
if (pq->pq_tbia) {
mutex_spin_exit(&pq->pq_lock);
--
Michael L. Hitch
mhitch@...
Computer Consultant
Information Technology Center
Montana State University Bozeman, MT USA
