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The calls to vm_radix_lookup_ge() by vm_reserv_alloc_{contig,page}() can

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be eliminated.  If the calls to vm_radix_lookup_le() return NULL, then
the page at the head of the object's memq must be the page with the least
pindex greater than the specified pindex.

Reviewed by:	attilio
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
alc 2013-03-17 20:40:31 +00:00
parent 8a01505f5e
commit 6cbd8f24b9
1 changed files with 2 additions and 2 deletions
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4
sys/vm/vm_reserv.c
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@ -352,7 +352,7 @@ vm_reserv_alloc_contig(vm_object_t object, vm_pindex_t pindex, u_long npages,
goto found;
msucc = TAILQ_NEXT(mpred, listq);
} else
msucc = vm_radix_lookup_ge(&object->rtree, pindex);
msucc = TAILQ_FIRST(&object->memq);
if (msucc != NULL) {
KASSERT(msucc->pindex > pindex,
("vm_reserv_alloc_page: pindex already allocated"));
@ -507,7 +507,7 @@ vm_reserv_alloc_page(vm_object_t object, vm_pindex_t pindex)
goto found;
msucc = TAILQ_NEXT(mpred, listq);
} else
msucc = vm_radix_lookup_ge(&object->rtree, pindex);
msucc = TAILQ_FIRST(&object->memq);
if (msucc != NULL) {
KASSERT(msucc->pindex > pindex,
("vm_reserv_alloc_page: pindex already allocated"));