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| author | Chris Mason <chris.mason@oracle.com> | 2008-01-24 16:13:08 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:59 -0400 |
| commit | d1310b2e0cd98eb1348553e69b73827b436dca7b (patch) | |
| tree | f55e9c380df0f3a7e9fb792b2308b52b632b90aa /fs/btrfs/super.c | |
| parent | 5f56406aabdf5444d040c5955effc665b1d0dbaf (diff) | |
| download | lwn-d1310b2e0cd98eb1348553e69b73827b436dca7b.tar.gz lwn-d1310b2e0cd98eb1348553e69b73827b436dca7b.zip | |
Btrfs: Split the extent_map code into two parts
There is now extent_map for mapping offsets in the file to disk and
extent_io for state tracking, IO submission and extent_bufers.
The new extent_map code shifts from [start,end] pairs to [start,len], and
pushes the locking out into the caller. This allows a few performance
optimizations and is easier to use.
A number of extent_map usage bugs were fixed, mostly with failing
to remove extent_map entries when changing the file.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 8b52c69fda2e..f8a1016600b1 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -468,10 +468,15 @@ static int __init init_btrfs_fs(void) err = btrfs_init_cachep(); if (err) goto free_transaction_sys; - err = extent_map_init(); + + err = extent_io_init(); if (err) goto free_cachep; + err = extent_map_init(); + if (err) + goto free_extent_io; + err = register_filesystem(&btrfs_fs_type); if (err) goto free_extent_map; @@ -479,6 +484,8 @@ static int __init init_btrfs_fs(void) free_extent_map: extent_map_exit(); +free_extent_io: + extent_io_exit(); free_cachep: btrfs_destroy_cachep(); free_transaction_sys: @@ -492,6 +499,7 @@ static void __exit exit_btrfs_fs(void) btrfs_exit_transaction_sys(); btrfs_destroy_cachep(); extent_map_exit(); + extent_io_exit(); unregister_filesystem(&btrfs_fs_type); btrfs_exit_sysfs(); } |