The patch titled
make ext3 mount default to barrier=1
has been added to the -mm tree. Its filename is
make-ext3-mount-default-to-barrier=1.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: make ext3 mount default to barrier=1
From: Chris Mason <mason@xxxxxxxx>
Turn on barriers by default for ext3. mount -o barrier=0 will turn them off.
It also changes the ext3 fsync call to trigger a barrier when a commit isn't
done.
Signed-off-by: Chris Mason <mason@xxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
diff -puN fs/ext3/fsync.c~make-ext3-mount-default-to-barrier=1 fs/ext3/fsync.c
--- a/fs/ext3/fsync.c~make-ext3-mount-default-to-barrier=1
+++ a/fs/ext3/fsync.c
@@ -27,6 +27,7 @@
#include <linux/sched.h>
#include <linux/writeback.h>
#include <linux/jbd.h>
+#include <linux/blkdev.h>
#include <linux/ext3_fs.h>
#include <linux/ext3_jbd.h>
@@ -81,7 +82,10 @@ int ext3_sync_file(struct file * file, s
.sync_mode = WB_SYNC_ALL,
.nr_to_write = 0, /* sys_fsync did this */
};
+ journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
ret = sync_inode(inode, &wbc);
+ if (journal && (journal->j_flags & JFS_BARRIER))
+ blkdev_issue_flush(inode->i_sb->s_bdev, NULL);
}
out:
return ret;
diff -puN fs/ext3/super.c~make-ext3-mount-default-to-barrier=1 fs/ext3/super.c
--- a/fs/ext3/super.c~make-ext3-mount-default-to-barrier=1
+++ a/fs/ext3/super.c
@@ -1427,6 +1427,8 @@ 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,
_
Patches currently in -mm which might be from mason@xxxxxxxx are
reiserfs-warn-about-the-useless-nolargeio-option.patch
make-reiserfs-default-to-barrier=flush.patch
make-ext3-mount-default-to-barrier=1.patch
-
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