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authorYan Zheng <zheng.yan@oracle.com>2009-09-11 16:11:19 -0400
committerChris Mason <chris.mason@oracle.com>2009-09-17 15:47:36 -0400
commit11833d66be94b514652466802100378046c16b72 (patch)
tree2b00b36d0aa42e9e10cecf3bf723eb70a607afec /fs/btrfs/tree-log.c
parent6e74057c4686dc12ea767b4bdc50a63876056e1c (diff)
Btrfs: improve async block group caching
This patch gets rid of two limitations of async block group caching. The old code delays handling pinned extents when block group is in caching. To allocate logged file extents, the old code need wait until block group is fully cached. To get rid of the limitations, This patch introduces a data structure to track the progress of caching. Base on the caching progress, we know which extents should be added to the free space cache when handling the pinned extents. The logged file extents are also handled in a similar way. This patch also changes how pinned extents are tracked. The old code uses one tree to track pinned extents, and copy the pinned extents tree at transaction commit time. This patch makes it use two trees to track pinned extents. One tree for extents that are pinned in the running transaction, one tree for extents that can be unpinned. At transaction commit time, we swap the two trees. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 8661a7381b3..f4a7b62f9be 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -263,8 +263,8 @@ static int process_one_buffer(struct btrfs_root *log,
struct walk_control *wc, u64 gen)
{
if (wc->pin)
- btrfs_update_pinned_extents(log->fs_info->extent_root,
- eb->start, eb->len, 1);
+ btrfs_pin_extent(log->fs_info->extent_root,
+ eb->start, eb->len, 0);
if (btrfs_buffer_uptodate(eb, gen)) {
if (wc->write)