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Utilize pmap_pte_quick() rather than pmap_pte() in pmap_protect(). The

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reason being that pmap_pte_quick() requires the page queues lock, which is
already held, rather than Giant.
This commit is contained in:
Alan Cox 2004-07-18 21:19:10 +00:00
parent 1f7a1baa37
commit aec86de47b
1 changed files with 3 additions and 1 deletions
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4
sys/i386/i386/pmap.c
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@ -1805,6 +1805,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
anychanged = 0;
vm_page_lock_queues();
sched_pin();
PMAP_LOCK(pmap);
for (; sva < eva; sva = pdnxt) {
unsigned pdirindex;
@ -1839,7 +1840,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
pt_entry_t *pte;
vm_page_t m;
if ((pte = pmap_pte(pmap, sva)) == NULL)
if ((pte = pmap_pte_quick(pmap, sva)) == NULL)
continue;
pbits = *pte;
if (pbits & PG_MANAGED) {
@ -1868,6 +1869,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
}
if (anychanged)
pmap_invalidate_all(pmap);
sched_unpin();
vm_page_unlock_queues();
PMAP_UNLOCK(pmap);
}