Author: kib
Date: Mon Nov 5 16:40:42 2012
New Revision: 242617
URL: http://svnweb.freebsd.org/changeset/base/242617
Log:
A clarification to the behaviour of the active vnode list management
regarding the vnode page cleaning.
In collaboration with: pho
MFC after: 1 week
Modified:
head/sys/kern/vfs_subr.c
Modified: head/sys/kern/vfs_subr.c
==============================================================================
--- head/sys/kern/vfs_subr.c Mon Nov 5 15:23:54 2012 (r242616)
+++ head/sys/kern/vfs_subr.c Mon Nov 5 16:40:42 2012 (r242617)
@@ -2507,6 +2507,9 @@ vinactive(struct vnode *vp, struct threa
* Before moving off the active list, we must be sure that any
* modified pages are on the vnode's dirty list since these will
* no longer be checked once the vnode is on the inactive list.
+ * Because the vnode vm object keeps a hold reference on the vnode
+ * if there is at least one resident non-cached page, the vnode
+ * cannot leave the active list without the page cleanup done.
*/
obj = vp->v_object;
if (obj != NULL && (obj->flags & OBJ_MIGHTBEDIRTY) != 0) {
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