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convert pmap_lock into an IPL_VM lock, and avoid calling 

KASSERT(!mutex_owned(&pmap_lock)) since that's no longer valid.

this fixes hangs on 4-core machines like the U80.

tested on U80, SB2500 and SB2000.


XXX: my initial attempts to replace pseg_lock with this new equivalent
XXX: lock hang in pmap_bootstrap it seems..  but this should be able
XXX: to go away now.
This commit is contained in:
mrg 2010-03-20 20:36:23 +00:00
parent 57d3f386e1
commit 9a2f900318
1 changed files with 3 additions and 7 deletions
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10
sys/arch/sparc64/sparc64/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.259 2010/03/10 06:57:22 mrg Exp $ */
/* $NetBSD: pmap.c,v 1.260 2010/03/20 20:36:23 mrg Exp $ */
/*
*
* Copyright (C) 1996-1999 Eduardo Horvath.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.259 2010/03/10 06:57:22 mrg Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.260 2010/03/20 20:36:23 mrg Exp $");
#undef NO_VCACHE /* Don't forget the locked TLB in dostart */
#define HWREF
@ -1293,7 +1293,7 @@ pmap_init(void)
vm_first_phys = avail_start;
vm_num_phys = avail_end - avail_start;
mutex_init(&pmap_lock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&pmap_lock, MUTEX_SPIN, IPL_VM);
#if defined(USE_LOCKSAFE_PSEG_GETSET)
mutex_init(&pseg_lock, MUTEX_SPIN, IPL_VM);
#endif
@ -2621,8 +2621,6 @@ pmap_is_modified(struct vm_page *pg)
pv_entry_t pv, npv;
bool res = false;
KASSERT(!mutex_owned(&pmap_lock));
/* Check if any mapping has been modified */
pv = &pg->mdpage.mdpg_pvh;
if (pv->pv_va & PV_MOD)
@ -2725,8 +2723,6 @@ pmap_is_referenced(struct vm_page *pg)
pv_entry_t pv;
bool res = false;
KASSERT(!mutex_owned(&pmap_lock));
/* Check if any mapping has been referenced */
pv = &pg->mdpage.mdpg_pvh;
if (pv->pv_va & PV_REF)