Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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.
This commit is contained in:
mhitch 2009-10-04 17:00:31 +00:00
parent 9dbaa03ccb
commit 7e4eb61e65
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sys/arch/alpha/alpha/pmap.c
View File

@ -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 @@ pmap_bootstrap(paddr_t ptaddr, u_int maxasn, u_long ncpuids)
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