linux-ext4 - [PATCH] ext3: make ext3 mount default to barrier=1

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Message-ID: <20110716204650.GA16882@infradead.org>
Date:	Sat, 16 Jul 2011 16:46:50 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	viro@...iv.linux.org.uk
Cc:	jeffm@...e.com, chris.mason@...cle.com, jack@...e.cz,
	reiserfs-devel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: [PATCH] ext3: make ext3 mount default to barrier=1

This patch turns on barriers by default for ext3.  mount -o barrier=0
will turn them off.  Based on a patch from Chris Mason in the SuSE tree.

Signed-off-by: Chris Mason <chris.mason@...cle.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Acked-by: Eric Sandeen <sandeen@...hat.com>
Acked-by: Jan Kara <jack@...e.cz>
Acked-by: Jeff Mahoney <jeffm@...e.com>
Acked-by: Ted Ts'o <tytso@....edu>

Index: linux-2.6/fs/ext3/super.c
===================================================================
--- linux-2.6.orig/fs/ext3/super.c	2011-06-30 21:19:37.389544975 +0200
+++ linux-2.6/fs/ext3/super.c	2011-07-02 13:56:51.877784292 +0200
@@ -1718,6 +1718,8 @@ static int ext3_fill_super (struct super
 	sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
 	sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
 
+	/* enable barriers by default */
+	set_opt(sbi->s_mount_opt, BARRIER);
 	set_opt(sbi->s_mount_opt, RESERVATION);
 
 	if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
--
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