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ubc_fault: use PMAP_CANFAIL. pointed by Jed Davis on tech-kern@.

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This commit is contained in:
yamt 2006-05-03 15:57:35 +00:00
parent 69f5e94d4e
commit 6957cc2e13
1 changed files with 10 additions and 4 deletions
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14
sys/uvm/uvm_bio.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_bio.c,v 1.45 2006/04/13 02:17:42 yamt Exp $ */
/* $NetBSD: uvm_bio.c,v 1.46 2006/05/03 15:57:35 yamt Exp $ */
/*
* Copyright (c) 1998 Chuck Silvers.
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.45 2006/04/13 02:17:42 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.46 2006/05/03 15:57:35 yamt Exp $");
#include "opt_uvmhist.h"
@ -359,14 +359,20 @@ again:
pg->offset < umap->writeoff ||
pg->offset + PAGE_SIZE > umap->writeoff + umap->writelen);
mask = rdonly ? ~VM_PROT_WRITE : VM_PROT_ALL;
pmap_enter(ufi->orig_map->pmap, va, VM_PAGE_TO_PHYS(pg),
prot & mask, access_type & mask);
error = pmap_enter(ufi->orig_map->pmap, va, VM_PAGE_TO_PHYS(pg),
prot & mask, PMAP_CANFAIL | (access_type & mask));
uvm_lock_pageq();
uvm_pageactivate(pg);
uvm_unlock_pageq();
pg->flags &= ~(PG_BUSY|PG_WANTED);
UVM_PAGE_OWN(pg, NULL);
simple_unlock(&uobj->vmobjlock);
if (error) {
UVMHIST_LOG(ubchist, "pmap_enter fail %d",
error, 0, 0, 0);
uvm_wait("ubc_pmfail");
/* will refault */
}
}
pmap_update(ufi->orig_map->pmap);
return 0;