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| author | Chris Mason <chris.mason@oracle.com> | 2008-07-17 12:53:50 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:04 -0400 |
| commit | e6dcd2dc9c489108648e2ed543315dd134d50a9a (patch) | |
| tree | cddf6f588b65e28c5feb8bff89b22d8ff70f8a50 /fs/btrfs/transaction.h | |
| parent | 77a41afb7d0dd0f27b6f2f1a5bc701929c7034de (diff) | |
| download | linux-e6dcd2dc9c489108648e2ed543315dd134d50a9a.tar.gz linux-e6dcd2dc9c489108648e2ed543315dd134d50a9a.tar.bz2 linux-e6dcd2dc9c489108648e2ed543315dd134d50a9a.zip | |
Btrfs: New data=ordered implementation
The old data=ordered code would force commit to wait until
all the data extents from the transaction were fully on disk. This
introduced large latencies into the commit and stalled new writers
in the transaction for a long time.
The new code changes the way data allocations and extents work:
* When delayed allocation is filled, data extents are reserved, and
the extent bit EXTENT_ORDERED is set on the entire range of the extent.
A struct btrfs_ordered_extent is allocated an inserted into a per-inode
rbtree to track the pending extents.
* As each page is written EXTENT_ORDERED is cleared on the bytes corresponding
to that page.
* When all of the bytes corresponding to a single struct btrfs_ordered_extent
are written, The previously reserved extent is inserted into the FS
btree and into the extent allocation trees. The checksums for the file
data are also updated.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
| -rw-r--r-- | fs/btrfs/transaction.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 9ccd5a5b170f..910350cd4cf0 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -19,7 +19,6 @@ #ifndef __BTRFS_TRANSACTION__ #define __BTRFS_TRANSACTION__ #include "btrfs_inode.h" -#include "ordered-data.h" struct btrfs_transaction { u64 transid; @@ -31,7 +30,6 @@ struct btrfs_transaction { struct list_head list; struct extent_io_tree dirty_pages; unsigned long start_time; - struct btrfs_ordered_inode_tree ordered_inode_tree; wait_queue_head_t writer_wait; wait_queue_head_t commit_wait; struct list_head pending_snapshots; @@ -88,8 +86,6 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); int btrfs_clean_old_snapshots(struct btrfs_root *root); int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); -int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans, - struct btrfs_root *root); int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, struct btrfs_root *root); #endif |