Author: kib
Date: Mon Jun 17 06:21:42 2013
New Revision: 251832
URL: http://svnweb.freebsd.org/changeset/base/251832
Log:
MFC r251322:
Instead of yielding, pause for 1 tick when donating the current thread
time to the owner of the vnode lock while iterating over the free vnode
list.
Modified:
stable/9/sys/kern/vfs_subr.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/vfs_subr.c
==============================================================================
--- stable/9/sys/kern/vfs_subr.c Mon Jun 17 06:15:52 2013
(r251831)
+++ stable/9/sys/kern/vfs_subr.c Mon Jun 17 06:21:42 2013
(r251832)
@@ -4824,7 +4824,7 @@ restart:
if (ALWAYS_YIELD || should_yield()) {
TAILQ_INSERT_BEFORE(vp, *mvp, v_actfreelist);
mtx_unlock(&vnode_free_list_mtx);
- kern_yield(PRI_USER);
+ pause("vnacti", 1);
mtx_lock(&vnode_free_list_mtx);
goto restart;
}
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