From owner-svn-src-head@FreeBSD.ORG  Tue Jul  9 08:47:11 2013
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id BEC79327;
 Tue,  9 Jul 2013 08:47:11 +0000 (UTC) (envelope-from avg@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 B15851114;
 Tue,  9 Jul 2013 08:47:11 +0000 (UTC)
Received: from svn.freebsd.org ([127.0.1.70])
 by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r698lBPB018446;
 Tue, 9 Jul 2013 08:47:11 GMT (envelope-from avg@svn.freebsd.org)
Received: (from avg@localhost)
 by svn.freebsd.org (8.14.7/8.14.5/Submit) id r698lBLR018445;
 Tue, 9 Jul 2013 08:47:11 GMT (envelope-from avg@svn.freebsd.org)
Message-Id: <201307090847.r698lBLR018445@svn.freebsd.org>
From: Andriy Gapon <avg@FreeBSD.org>
Date: Tue, 9 Jul 2013 08:47:11 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r253073 -
 head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
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, 09 Jul 2013 08:47:11 -0000

Author: avg
Date: Tue Jul  9 08:47:11 2013
New Revision: 253073
URL: http://svnweb.freebsd.org/changeset/base/253073

Log:
  zfs: try to properly handle i/o errors in mappedread_sf
  
  Unconditionally freeing a page is not good, especially if it is the page
  that was wired by the caller.  The checks are picked up from
  kern_sendfile.
  
  MFC after:	3 weeks

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Tue Jul  9 08:42:02 2013	(r253072)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Tue Jul  9 08:47:11 2013	(r253073)
@@ -546,7 +546,9 @@ mappedread_sf(vnode_t *vp, int nbytes, u
 			vm_page_io_finish(pp);
 			vm_page_lock(pp);
 			if (error) {
-				vm_page_free(pp);
+				if (pp->wire_count == 0 && pp->valid == 0 &&
+				    pp->busy == 0 && !(pp->oflags & VPO_BUSY))
+					vm_page_free(pp);
 			} else {
 				pp->valid = VM_PAGE_BITS_ALL;
 				vm_page_activate(pp);