From patchwork Thu Apr 14 21:16:31 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Magenheimer X-Patchwork-Id: 709611 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p3ELJSLP014644 for ; Thu, 14 Apr 2011 21:19:28 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752833Ab1DNVSC (ORCPT ); Thu, 14 Apr 2011 17:18:02 -0400 Received: from rcsinet10.oracle.com ([148.87.113.121]:32891 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751737Ab1DNVSA (ORCPT ); Thu, 14 Apr 2011 17:18:00 -0400 Received: from rcsinet15.oracle.com (rcsinet15.oracle.com [148.87.113.117]) by rcsinet10.oracle.com (Switch-3.4.2/Switch-3.4.2) with ESMTP id p3ELGaG7000658 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 14 Apr 2011 21:16:37 GMT Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by rcsinet15.oracle.com (Switch-3.4.2/Switch-3.4.1) with ESMTP id p3ELGWxt007681 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 14 Apr 2011 21:16:33 GMT Received: from ca-server1.us.oracle.com (ca-server1.us.oracle.com [139.185.48.5]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id p3ELGW79012416; Thu, 14 Apr 2011 16:16:32 -0500 Received: from dmagenhe by ca-server1.us.oracle.com with local (Exim 4.69) (envelope-from ) id 1QATtv-0007D0-PZ; Thu, 14 Apr 2011 14:16:31 -0700 Date: Thu, 14 Apr 2011 14:16:31 -0700 From: Dan Magenheimer To: chris.mason@oracle.com, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, mfasheh@suse.com, jlbec@evilplan.org, matthew@wil.cx, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org, hch@infradead.org, ngupta@vflare.org, jeremy@goop.org, JBeulich@novell.com, kurt.hackel@oracle.com, npiggin@kernel.dk, dave.mccracken@oracle.com, riel@redhat.com, avi@redhat.com, konrad.wilk@oracle.com, dan.magenheimer@oracle.com, mel@csn.ul.ie, yinghan@google.com, gthelen@google.com, torvalds@linux-foundation.org Subject: [PATCH V8 2/8] fs: add field to superblock to support cleancache Message-ID: <20110414211631.GA27708@ca-server1.us.oracle.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.16 (2007-06-11) X-Source-IP: acsmt357.oracle.com [141.146.40.157] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090206.4DA76433.00F9,ss=1,fgs=0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 14 Apr 2011 21:19:28 +0000 (UTC) [PATCH V8 2/8] fs: add field to superblock to support cleancache This second patch of eight in this cleancache series adds a field to the generic superblock to squirrel away a pool identifier that is dynamically provided by cleancache-enabled filesystems at mount time to uniquely identify files and pages belonging to this mounted filesystem. Details and a FAQ can be found in Documentation/vm/cleancache.txt [v8: trivial merge conflict update] Signed-off-by: Dan Magenheimer Reviewed-by: Jeremy Fitzhardinge Reviewed-by: Konrad Rzeszutek Wilk Cc: Andrew Morton Cc: Al Viro Cc: Matthew Wilcox Cc: Nick Piggin Cc: Mel Gorman Cc: Rik Van Riel Cc: Jan Beulich Cc: Chris Mason Cc: Andreas Dilger Cc: Ted Ts'o Cc: Mark Fasheh Cc: Joel Becker Cc: Nitin Gupta --- Diffstat: include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --- linux-2.6.39-rc3/include/linux/fs.h 2011-04-11 18:21:51.000000000 -0600 +++ linux-2.6.39-rc3-cleancache/include/linux/fs.h 2011-04-13 16:46:44.444861817 -0600 @@ -1430,6 +1430,11 @@ struct super_block { */ char __rcu *s_options; const struct dentry_operations *s_d_op; /* default d_op for dentries */ + + /* + * Saved pool identifier for cleancache (-1 means none) + */ + int cleancache_poolid; }; extern struct timespec current_fs_time(struct super_block *sb);