PERFORCE change 90849 for review
Alan Cox
alc at FreeBSD.org
Tue Jan 31 15:41:31 PST 2006
http://perforce.freebsd.org/chv.cgi?CH=90849
Change 90849 by alc at alc_home on 2006/01/31 23:41:03
Introduce vm_buddyq_find() and use it to reclaim pages from the cache
queues in vm_page_select_cache().
Affected files ...
.. //depot/projects/superpages/src/sys/vm/vm_buddy.h#8 edit
.. //depot/projects/superpages/src/sys/vm/vm_page.c#17 edit
Differences ...
==== //depot/projects/superpages/src/sys/vm/vm_buddy.h#8 (text+ko) ====
@@ -5,3 +5,16 @@
void buddy_free(vm_page_t m, int magn);
void buddy_free_locked(int baseq, vm_page_t m, int magn);
void buddy_unfree(vm_page_t m);
+
+static __inline vm_page_t
+vm_buddyq_find(int baseq)
+{
+ vm_page_t m;
+ int q;
+
+ q = 0;
+ while ((m = TAILQ_FIRST(&vm_page_queues[baseq + q].pl)) == NULL &&
+ q < BUDDY_QUEUES)
+ q++;
+ return (m);
+}
==== //depot/projects/superpages/src/sys/vm/vm_page.c#17 (text+ko) ====
@@ -737,7 +737,7 @@
boolean_t was_trylocked;
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
- while ((m = TAILQ_FIRST(&vm_page_queues[PQ_CACHE].pl)) != NULL) {
+ while ((m = vm_buddyq_find(PQ_CACHE)) != NULL) {
KASSERT(m->dirty == 0, ("Found dirty cache page %p", m));
KASSERT(!pmap_page_is_mapped(m),
("Found mapped cache page %p", m));
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