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Eliminate an unnecessary call to pmap_remove_all(). If a page belongs to

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an object whose reference count is zero, then that page cannot possibly
be mapped.
This commit is contained in:
Alan Cox 2010-04-20 04:16:39 +00:00
parent 0d526fa829
commit 5d4a7b7945
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=206885
1 changed files with 2 additions and 1 deletions
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3
sys/vm/vm_pageout.c
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@ -1122,7 +1122,8 @@ vm_pageout_scan(int pass)
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