From: Ted Ts'o Subject: Re: [PATCH 3/4] ext2fs: add multi-mount protection (INCOMPAT_MMP) Date: Sat, 24 Sep 2011 14:49:54 -0400 Message-ID: <20110924184954.GF2779@thunk.org> References: <1316821124-7461-1-git-send-email-adilger@whamcloud.com> <1316821124-7461-3-git-send-email-adilger@whamcloud.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org, Johann Lombardi To: Andreas Dilger Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:48278 "EHLO test.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752078Ab1IXSt4 (ORCPT ); Sat, 24 Sep 2011 14:49:56 -0400 Content-Disposition: inline In-Reply-To: <1316821124-7461-3-git-send-email-adilger@whamcloud.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Fri, Sep 23, 2011 at 05:38:43PM -0600, Andreas Dilger wrote: > Multi-mount protection is feature that allows mke2fs, e2fsck, and > others to detect if the filesystem is mounted on a remote node (on > SAN disks) and avoid corrupting the filesystem. For e2fsprogs this > means that it checks the MMP block to see if the filesystem is in use, > and marks the filesystem busy while e2fsck is running on the system. Applied, thanks. - Ted