1 commit 79eb79ed8e042e446accad244073af0f9bf4f35d
2 Author: S.Çağlar Onur <caglar@cs.princeton.edu>
3 Date: Fri Mar 19 10:17:24 2010 -0400
5 make_ext3_mount_default_to_barrier=1
7 diff --git a/fs/ext3/fsync.c b/fs/ext3/fsync.c
8 index 00c9597..841f0f7 100644
12 #include <linux/sched.h>
13 #include <linux/writeback.h>
14 #include <linux/jbd.h>
15 +#include <linux/blkdev.h>
16 #include <linux/ext3_fs.h>
17 #include <linux/ext3_jbd.h>
19 @@ -84,7 +85,10 @@ int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
20 .sync_mode = WB_SYNC_ALL,
21 .nr_to_write = 0, /* sys_fsync did this */
23 + journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
24 ret = sync_inode(inode, &wbc);
25 + if (journal && (journal->j_flags & JFS_BARRIER))
26 + blkdev_issue_flush(inode->i_sb->s_bdev, NULL);
30 diff --git a/fs/ext3/super.c b/fs/ext3/super.c
31 index 7facb78..ce186bc 100644
34 @@ -1504,6 +1504,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
35 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
36 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
38 + /* enable barriers by default */
39 + set_opt(sbi->s_mount_opt, BARRIER);
40 set_opt(sbi->s_mount_opt, RESERVATION);
42 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,