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Explicitly set page dirty if this is a write fault - reduces calls to

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pmap_is_modified() later.
This commit is contained in:
dg 1995-03-27 02:41:00 +00:00
parent 7ea938b9c9
commit eae6c57cbf
1 changed files with 11 additions and 2 deletions
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13
sys/vm/vm_fault.c
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@ -66,7 +66,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_fault.c,v 1.19 1995/02/22 09:15:26 davidg Exp $
* $Id: vm_fault.c,v 1.20 1995/03/01 23:29:55 davidg Exp $
*/
/*
@ -806,8 +806,17 @@ RetryFault:;
* won't find us (yet).
*/
if (prot & VM_PROT_WRITE)
if (prot & VM_PROT_WRITE) {
m->flags |= PG_WRITEABLE;
/*
* If the fault is a write, we know that this page is being
* written NOW. This will save on the pmap_is_modified() calls
* later.
*/
if (fault_type & VM_PROT_WRITE) {
m->dirty = VM_PAGE_BITS_ALL;
}
}
m->flags |= PG_MAPPED;
pmap_enter(map->pmap, vaddr, VM_PAGE_TO_PHYS(m), prot, wired);