Module Name: src
Committed By: mhitch
Date: Sun Oct 4 17:00:31 UTC 2009
Modified Files:
src/sys/arch/alpha/alpha: pmap.c
Log Message:
IPI interrupts occur above IPL_VM, so using IPL_VM in for the tlb shootdown
queue mutex doesn't work very well. I get various deadlocks and corrupted
queue entries. Change to IPL_SCHED [IPL_CLOCK] to block IPI interrupts
while the cpu is mucking with the shootdown queue.
To generate a diff of this commit:
cvs rdiff -u -r1.242 -r1.243 src/sys/arch/alpha/alpha/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/alpha/alpha/pmap.c
diff -u src/sys/arch/alpha/alpha/pmap.c:1.242 src/sys/arch/alpha/alpha/pmap.c:1.243
--- src/sys/arch/alpha/alpha/pmap.c:1.242 Thu Sep 10 22:27:11 2009
+++ src/sys/arch/alpha/alpha/pmap.c Sun Oct 4 17:00:31 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.242 2009/09/10 22:27:11 mhitch Exp $ */
+/* $NetBSD: pmap.c,v 1.243 2009/10/04 17:00:31 mhitch Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000, 2001, 2007, 2008 The NetBSD Foundation, Inc.
@@ -140,7 +140,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.242 2009/09/10 22:27:11 mhitch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.243 2009/10/04 17:00:31 mhitch Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -962,7 +962,7 @@
for (i = 0; i < ALPHA_MAXPROCS; i++) {
TAILQ_INIT(&pmap_tlb_shootdown_q[i].pq_head);
mutex_init(&pmap_tlb_shootdown_q[i].pq_lock, MUTEX_DEFAULT,
- IPL_VM);
+ IPL_SCHED);
}
#endif
