diff options
| author |   Chris Mason <chris.mason@oracle.com> | 2009-07-30 10:04:48 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-07-30 10:14:46 -0400 |
| commit | f36f3042eae238bdaefe7c79310afe573bfc3622 (patch) | |
| tree | 83ea0e271dedeef36423509be7f4189b838d14b5 /fs | |
| parent | Btrfs: preserve commit_root for async caching (diff) | |
| download | linux-dev-f36f3042eae238bdaefe7c79310afe573bfc3622.tar.xz linux-dev-f36f3042eae238bdaefe7c79310afe573bfc3622.zip | |
Btrfs: be more polite in the async caching threads
The semaphore used by the async caching threads can prevent a
transaction commit, which can make the FS appear to stall. This
releases the semaphore more often when a transaction commit is
in progress.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 5 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 10 | ||||
| -rw-r--r-- | fs/btrfs/transaction.h | 1 |
3 files changed, 14 insertions, 2 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 2fe21fa74913..dc84daee6bc4 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -302,10 +302,11 @@ again: else if (ret) break; - if (need_resched()) { + if (need_resched() || + btrfs_transaction_in_commit(fs_info)) { btrfs_release_path(fs_info->extent_root, path); up_read(&fs_info->extent_commit_sem); - cond_resched(); + schedule_timeout(1); goto again; } diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index de48e4ec808c..cdbb5022da52 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -857,6 +857,16 @@ static void update_super_roots(struct btrfs_root *root) super->root_level = root_item->level; } +int btrfs_transaction_in_commit(struct btrfs_fs_info *info) +{ + int ret = 0; + spin_lock(&info->new_trans_lock); + if (info->running_transaction) + ret = info->running_transaction->in_commit; + spin_unlock(&info->new_trans_lock); + return ret; +} + int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root) { diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 961c3ee5a2e1..663c67404918 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -107,4 +107,5 @@ int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, struct extent_io_tree *dirty_pages); +int btrfs_transaction_in_commit(struct btrfs_fs_info *info); #endif |