Author: alc
Date: Tue Apr 20 04:16:39 2010
New Revision: 206885
URL: http://svn.freebsd.org/changeset/base/206885
Log:
Eliminate an unnecessary call to pmap_remove_all(). If a page belongs to
an object whose reference count is zero, then that page cannot possibly
be mapped.
Modified:
head/sys/vm/vm_pageout.c
Modified: head/sys/vm/vm_pageout.c
==============================================================================
--- head/sys/vm/vm_pageout.c Tue Apr 20 03:20:20 2010 (r206884)
+++ head/sys/vm/vm_pageout.c Tue Apr 20 04:16:39 2010 (r206885)
@@ -1122,7 +1122,8 @@ unlock_and_continue:
m->act_count == 0) {
page_shortage--;
if (object->ref_count == 0) {
- pmap_remove_all(m);
+ KASSERT(!pmap_page_is_mapped(m),
+ ("vm_pageout_scan: page %p is mapped", m));
if (m->dirty == 0)
vm_page_cache(m);
else
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