From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from magic.merlins.org ([209.81.13.136]:57477 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754589AbaDKGLj (ORCPT ); Fri, 11 Apr 2014 02:11:39 -0400 Date: Thu, 10 Apr 2014 23:11:38 -0700 From: Marc MERLIN To: Qu Wenruo Cc: linux-btrfs@vger.kernel.org Subject: Re: [PATCH 2/2] btrfs-progs: Add explain on btrfs-zero-log. Message-ID: <20140411061138.GE7322@merlins.org> References: <1397184233-18535-1-git-send-email-quwenruo@cn.fujitsu.com> <1397184233-18535-2-git-send-email-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1397184233-18535-2-git-send-email-quwenruo@cn.fujitsu.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Fri, Apr 11, 2014 at 10:43:53AM +0800, Qu Wenruo wrote: > Add more explain on btrfs-zero-log about when to use it. > > Cc: Marc MERLIN > Signed-off-by: Qu Wenruo Reviewed-by: Marc MERLIN Looks good, thank you. Marc > --- > Documentation/btrfs-zero-log.txt | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/Documentation/btrfs-zero-log.txt b/Documentation/btrfs-zero-log.txt > index e3041fa..a8e4dd3 100644 > --- a/Documentation/btrfs-zero-log.txt > +++ b/Documentation/btrfs-zero-log.txt > @@ -17,6 +17,24 @@ allow you to mount the filesystem again. > The common case where this happens has been fixed a long time ago, > so it is unlikely that you will see this particular problem. > > +One can determine whether 'btrfs-zero-log' is needed according to the kernel > +backtrace: > +---- > +? replay_one_dir_item+0xb5/0xb5 [btrfs] > +? walk_log_tree+0x9c/0x19d [btrfs] > +? btrfs_read_fs_root_no_radix+0x169/0x1a1 [btrfs] > +? btrfs_recover_log_trees+0x195/0x29c [btrfs] > +? replay_one_dir_item+0xb5/0xb5 [btrfs] > +? btree_read_extent_buffer_pages+0x76/0xbc [btrfs] > +? open_ctree+0xff6/0x132c [btrfs] > +---- > + > +If the errors are like above, then 'btrfs-zero-log' should be used to clear > +the log and the filesystem may be mounted normally again. > + > +NOTE: If you use btrfs as the root filesystem, you may want to include > +'btrfs-zero-log' into initramdisk if the log problems hits you often. > + > EXIT STATUS > ----------- > 'btrfs-zero-log' will return 0 if no error happened. > -- > 1.9.2 > > -- > 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 > -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/