svn commit: r305504 - head/sys/fs/nullfs

[Mateusz Guzik]

Author: mjg
Date: Tue Sep  6 21:22:03 2016
New Revision: 305504
URL: https://svnweb.freebsd.org/changeset/base/305504

Log:
  nullfs: stop special-casing directories in null_vptocnp
  
  The previous code was forcing an expensive walk in vop_stdvptocnp,
  which was causing performance issues on highly contended zfs.
  
  No objections:	kib
  MFC after:	2 weeks

Modified:
  head/sys/fs/nullfs/null_vnops.c

Modified: head/sys/fs/nullfs/null_vnops.c
==============================================================================
--- head/sys/fs/nullfs/null_vnops.c	Tue Sep  6 21:18:14 2016	(r305503)
+++ head/sys/fs/nullfs/null_vnops.c	Tue Sep  6 21:22:03 2016	(r305504)
@@ -870,9 +870,6 @@ null_vptocnp(struct vop_vptocnp_args *ap
 	struct ucred *cred = ap->a_cred;
 	int error, locked;
 
-	if (vp->v_type == VDIR)
-		return (vop_stdvptocnp(ap));
-
 	locked = VOP_ISLOCKED(vp);
 	lvp = NULLVPTOLOWERVP(vp);
 	vhold(lvp);