From owner-svn-src-head@FreeBSD.ORG  Tue May 21 20:54:03 2013
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 91B7CF7D;
 Tue, 21 May 2013 20:54:03 +0000 (UTC)
 (envelope-from attilio@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org
 [IPv6:2001:1900:2254:2068::e6a:0])
 by mx1.freebsd.org (Postfix) with ESMTP id 84D0EDAF;
 Tue, 21 May 2013 20:54:03 +0000 (UTC)
Received: from svn.freebsd.org ([127.0.1.70])
 by svn.freebsd.org (8.14.6/8.14.6) with ESMTP id r4LKs3QS054886;
 Tue, 21 May 2013 20:54:03 GMT (envelope-from attilio@svn.freebsd.org)
Received: (from attilio@localhost)
 by svn.freebsd.org (8.14.6/8.14.5/Submit) id r4LKs3Nv054885;
 Tue, 21 May 2013 20:54:03 GMT (envelope-from attilio@svn.freebsd.org)
Message-Id: <201305212054.r4LKs3Nv054885@svn.freebsd.org>
From: Attilio Rao <attilio@FreeBSD.org>
Date: Tue, 21 May 2013 20:54:03 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r250885 - head/sys/kern
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 21 May 2013 20:54:03 -0000

Author: attilio
Date: Tue May 21 20:54:03 2013
New Revision: 250885
URL: http://svnweb.freebsd.org/changeset/base/250885

Log:
  vm_object locking is not needed there as pages are already wired.
  
  Sponsored by:	EMC / Isilon storage division
  Submitted by:	alc

Modified:
  head/sys/kern/vfs_bio.c

Modified: head/sys/kern/vfs_bio.c
==============================================================================
--- head/sys/kern/vfs_bio.c	Tue May 21 20:38:19 2013	(r250884)
+++ head/sys/kern/vfs_bio.c	Tue May 21 20:54:03 2013	(r250885)
@@ -4211,7 +4211,6 @@ vfs_bio_bzero_buf(struct buf *bp, int ba
 	} else {
 		BUF_CHECK_UNMAPPED(bp);
 		n = PAGE_SIZE - (base & PAGE_MASK);
-		VM_OBJECT_WLOCK(bp->b_bufobj->bo_object);
 		for (i = base / PAGE_SIZE; size > 0 && i < bp->b_npages; ++i) {
 			m = bp->b_pages[i];
 			if (n > size)
@@ -4221,7 +4220,6 @@ vfs_bio_bzero_buf(struct buf *bp, int ba
 			size -= n;
 			n = PAGE_SIZE;
 		}
-		VM_OBJECT_WUNLOCK(bp->b_bufobj->bo_object);
 	}
 }