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authorChris Mason <chris.mason@oracle.com>2008-09-11 16:17:57 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:07 -0400
commitd0c803c4049c5ca322d4795d8b74f28768603e0e (patch)
treeb4c4f11b2f5938ad183a1771cd0b9e122709e2ff /fs/btrfs/tree-log.c
parent31ff1cd25d376e8f499d450de177dffadc9e1c56 (diff)
downloadblackbird-op-linux-d0c803c4049c5ca322d4795d8b74f28768603e0e.tar.gz
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Btrfs: Record dirty pages tree-log pages in an extent_io tree
This is the same way the transaction code makes sure that all the other tree blocks are safely on disk. There's an extent_io tree for each root, and any blocks allocated to the tree logs are recorded in that tree. At tree-log sync, the extent_io tree is walked to flush down the dirty pages and wait for them. The main benefit is less time spent walking the tree log and skipping clean pages, and getting sequential IO down to the drive. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index ae96451bc223..bfa710800963 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1954,10 +1954,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
int ret;
unsigned long batch;
struct btrfs_root *log = root->log_root;
- struct walk_control wc = {
- .write = 1,
- .process_func = process_one_buffer
- };
mutex_lock(&log->fs_info->tree_log_mutex);
if (atomic_read(&log->fs_info->tree_log_commit)) {
@@ -1985,18 +1981,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
if (batch == log->fs_info->tree_log_batch)
break;
}
- ret = walk_log_tree(trans, log, &wc);
- BUG_ON(ret);
-
- ret = walk_log_tree(trans, log->fs_info->log_root_tree, &wc);
- BUG_ON(ret);
-
- wc.wait = 1;
- ret = walk_log_tree(trans, log, &wc);
+ ret = btrfs_write_and_wait_marked_extents(log, &log->dirty_log_pages);
BUG_ON(ret);
-
- ret = walk_log_tree(trans, log->fs_info->log_root_tree, &wc);
+ ret = btrfs_write_and_wait_marked_extents(root->fs_info->log_root_tree,
+ &root->fs_info->log_root_tree->dirty_log_pages);
BUG_ON(ret);
btrfs_set_super_log_root(&root->fs_info->super_for_commit,
@@ -2025,6 +2014,8 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
int ret;
struct btrfs_root *log;
struct key;
+ u64 start;
+ u64 end;
struct walk_control wc = {
.free = 1,
.process_func = process_one_buffer
@@ -2037,6 +2028,16 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
ret = walk_log_tree(trans, log, &wc);
BUG_ON(ret);
+ while(1) {
+ ret = find_first_extent_bit(&log->dirty_log_pages,
+ 0, &start, &end, EXTENT_DIRTY);
+ if (ret)
+ break;
+
+ clear_extent_dirty(&log->dirty_log_pages,
+ start, end, GFP_NOFS);
+ }
+
log = root->log_root;
ret = btrfs_del_root(trans, root->fs_info->log_root_tree,
&log->root_key);
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