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| author | Chris Mason <chris.mason@oracle.com> | 2007-04-20 13:16:02 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-04-20 13:16:02 -0400 |
| commit | e66f709b157ee8557166c14b67c01bae978ac32e (patch) | |
| tree | 69a0c17aaffb173095e105a4680bedbefcb13c84 /fs/btrfs/disk-io.c | |
| parent | 8fd17795b2261ecb1bad2a6df09ef14c4957a3fb (diff) | |
| download | lwn-e66f709b157ee8557166c14b67c01bae978ac32e.tar.gz lwn-e66f709b157ee8557166c14b67c01bae978ac32e.zip | |
Btrfs: write barriers on commit, balance level before split
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index b666c3571aee..13046295bf7a 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -540,6 +540,7 @@ struct btrfs_root *open_ctree(struct super_block *sb) fs_info->btree_inode->i_nlink = 1; fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; fs_info->btree_inode->i_mapping->a_ops = &btree_aops; + fs_info->do_barriers = 1; BTRFS_I(fs_info->btree_inode)->root = tree_root; memset(&BTRFS_I(fs_info->btree_inode)->location, 0, sizeof(struct btrfs_key)); @@ -622,6 +623,7 @@ struct btrfs_root *open_ctree(struct super_block *sb) int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root) { + int ret; struct buffer_head *bh = root->fs_info->sb_buffer; btrfs_set_super_root(root->fs_info->disk_super, @@ -632,7 +634,15 @@ int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root csum_tree_block(root, bh, 0); bh->b_end_io = end_buffer_write_sync; get_bh(bh); - submit_bh(WRITE, bh); + if (root->fs_info->do_barriers) + ret = submit_bh(WRITE_BARRIER, bh); + else + ret = submit_bh(WRITE, bh); + if (ret == -EOPNOTSUPP) { + set_buffer_uptodate(bh); + root->fs_info->do_barriers = 0; + ret = submit_bh(WRITE, bh); + } wait_on_buffer(bh); if (!buffer_uptodate(bh)) { WARN_ON(1); |