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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 3 Jan 2014 20:02:59 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org
Subject: svn commit: r260241 - stable/9/sys/kern
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Author: kib
Date: Fri Jan  3 20:02:59 2014
New Revision: 260241
URL: http://svnweb.freebsd.org/changeset/base/260241

Log:
  MFC r259953:
  Fix accounting for the negative cache entries when reusing v_cache_dd.

Modified:
  stable/9/sys/kern/vfs_cache.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/vfs_cache.c
==============================================================================
--- stable/9/sys/kern/vfs_cache.c	Fri Jan  3 20:02:30 2014	(r260240)
+++ stable/9/sys/kern/vfs_cache.c	Fri Jan  3 20:02:59 2014	(r260241)
@@ -749,16 +749,20 @@ cache_enter_time(dvp, vp, cnp, tsp, dtsp
 			    ncp->nc_flag & NCF_ISDOTDOT) {
 				KASSERT(ncp->nc_dvp == dvp,
 				    ("wrong isdotdot parent"));
-				if (ncp->nc_vp != NULL)
+				if (ncp->nc_vp != NULL) {
 					TAILQ_REMOVE(&ncp->nc_vp->v_cache_dst,
 					    ncp, nc_dst);
-				else
+				} else {
 					TAILQ_REMOVE(&ncneg, ncp, nc_dst);
-				if (vp != NULL)
+					numneg--;
+				}
+				if (vp != NULL) {
 					TAILQ_INSERT_HEAD(&vp->v_cache_dst,
 					    ncp, nc_dst);
-				else
+				} else {
 					TAILQ_INSERT_TAIL(&ncneg, ncp, nc_dst);
+					numneg++;
+				}
 				ncp->nc_vp = vp;
 				CACHE_WUNLOCK();
 				return;
@@ -894,6 +898,8 @@ cache_enter_time(dvp, vp, cnp, tsp, dtsp
 	}
 	if (numneg * ncnegfactor > numcache) {
 		ncp = TAILQ_FIRST(&ncneg);
+		KASSERT(ncp->nc_vp == NULL, ("ncp %p vp %p on ncneg",
+		    ncp, ncp->nc_vp));
 		zap = 1;
 	}
 	if (hold)