Author: avg
Date: Sat Jun 2 19:13:56 2012
New Revision: 236481
URL: http://svn.freebsd.org/changeset/base/236481
Log:
MFC r235829: vm_pager_object_lookup: small performance optimization
Modified:
stable/9/sys/vm/vm_pager.c
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/amd64/include/xen/ (props changed)
stable/9/sys/boot/ (props changed)
stable/9/sys/boot/i386/efi/ (props changed)
stable/9/sys/boot/ia64/efi/ (props changed)
stable/9/sys/boot/ia64/ski/ (props changed)
stable/9/sys/boot/powerpc/boot1.chrp/ (props changed)
stable/9/sys/boot/powerpc/ofw/ (props changed)
stable/9/sys/cddl/contrib/opensolaris/ (props changed)
stable/9/sys/conf/ (props changed)
stable/9/sys/contrib/dev/acpica/ (props changed)
stable/9/sys/contrib/octeon-sdk/ (props changed)
stable/9/sys/contrib/pf/ (props changed)
stable/9/sys/contrib/x86emu/ (props changed)
stable/9/sys/dev/ (props changed)
stable/9/sys/dev/e1000/ (props changed)
stable/9/sys/dev/ixgbe/ (props changed)
stable/9/sys/fs/ (props changed)
stable/9/sys/fs/ntfs/ (props changed)
stable/9/sys/modules/ (props changed)
Modified: stable/9/sys/vm/vm_pager.c
==============================================================================
--- stable/9/sys/vm/vm_pager.c Sat Jun 2 19:11:47 2012 (r236480)
+++ stable/9/sys/vm/vm_pager.c Sat Jun 2 19:13:56 2012 (r236481)
@@ -270,14 +270,15 @@ vm_pager_object_lookup(struct pagerlst *
vm_object_t object;
TAILQ_FOREACH(object, pg_list, pager_object_list) {
- VM_OBJECT_LOCK(object);
- if (object->handle == handle &&
- (object->flags & OBJ_DEAD) == 0) {
- vm_object_reference_locked(object);
+ if (object->handle == handle) {
+ VM_OBJECT_LOCK(object);
+ if ((object->flags & OBJ_DEAD) == 0) {
+ vm_object_reference_locked(object);
+ VM_OBJECT_UNLOCK(object);
+ break;
+ }
VM_OBJECT_UNLOCK(object);
- break;
}
- VM_OBJECT_UNLOCK(object);
}
return (object);
}
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "[email protected]"
