svn commit: r191135 - head/sys/kern

[Konstantin Belousov]

Author: kib
Date: Thu Apr 16 09:33:52 2009
New Revision: 191135
URL: http://svn.freebsd.org/changeset/base/191135

Log:
  Export the number of times bufdaemon got help from the normal threads.

Modified:
  head/sys/kern/vfs_bio.c

Modified: head/sys/kern/vfs_bio.c
==============================================================================
--- head/sys/kern/vfs_bio.c	Thu Apr 16 05:52:47 2009	(r191134)
+++ head/sys/kern/vfs_bio.c	Thu Apr 16 09:33:52 2009	(r191135)
@@ -202,6 +202,9 @@ SYSCTL_INT(_vfs, OID_AUTO, getnewbufrest
 static int flushbufqtarget = 100;
 SYSCTL_INT(_vfs, OID_AUTO, flushbufqtarget, CTLFLAG_RW, &flushbufqtarget, 0,
     "Amount of work to do in flushbufqueues when helping bufdaemon");
+static long notbufdflashes;
+SYSCTL_LONG(_vfs, OID_AUTO, notbufdflashes, CTLFLAG_RD, &notbufdflashes, 0,
+    "Number of dirty buffer flushes done by the bufdaemon helpers");
 
 /*
  * Wakeup point for bufdaemon, as well as indicator of whether it is already
@@ -2281,6 +2284,7 @@ flushbufqueues(struct vnode *lvp, int qu
 			else {
 				bremfree(bp);
 				bwrite(bp);
+				notbufdflashes++;
 			}
 			vn_finished_write(mp);
 			VOP_UNLOCK(vp, 0);