diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-09 23:00:16 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-09 23:00:16 +0100 |
| commit | 4c098bcd55fad34dcf224bf8343db6a9ac58fc68 (patch) | |
| tree | ba2070fbdb19bc6a2cb648ec5e95d14822ad085d /fs | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 (diff) | |
| parent | Btrfs: don't use spin_is_contended (diff) | |
| download | linux-4c098bcd55fad34dcf224bf8343db6a9ac58fc68.tar.xz linux-4c098bcd55fad34dcf224bf8343db6a9ac58fc68.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: don't use spin_is_contended
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.c | 3 | ||||
| -rw-r--r-- | fs/btrfs/locking.c | 22 | ||||
| -rw-r--r-- | fs/btrfs/locking.h | 2 |
3 files changed, 1 insertions, 26 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 551177c0011a..35443cc4b9a9 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1530,8 +1530,7 @@ again: * for higher level blocks, try not to allocate blocks * with the block and the parent locks held. */ - if (level > 0 && !prealloc_block.objectid && - btrfs_path_lock_waiting(p, level)) { + if (level > 0 && !prealloc_block.objectid) { u32 size = b->len; u64 hint = b->start; diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 68fd9ccf1805..9ebe9385129b 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -236,25 +236,3 @@ int btrfs_tree_locked(struct extent_buffer *eb) return test_bit(EXTENT_BUFFER_BLOCKING, &eb->bflags) || spin_is_locked(&eb->lock); } - -/* - * btrfs_search_slot uses this to decide if it should drop its locks - * before doing something expensive like allocating free blocks for cow. - */ -int btrfs_path_lock_waiting(struct btrfs_path *path, int level) -{ - int i; - struct extent_buffer *eb; - - for (i = level; i <= level + 1 && i < BTRFS_MAX_LEVEL; i++) { - eb = path->nodes[i]; - if (!eb) - break; - smp_mb(); - if (spin_is_contended(&eb->lock) || - waitqueue_active(&eb->lock_wq)) - return 1; - } - return 0; -} - diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h index d92e707f5870..6bb0afbff928 100644 --- a/fs/btrfs/locking.h +++ b/fs/btrfs/locking.h @@ -26,8 +26,6 @@ int btrfs_tree_locked(struct extent_buffer *eb); int btrfs_try_tree_lock(struct extent_buffer *eb); int btrfs_try_spin_lock(struct extent_buffer *eb); -int btrfs_path_lock_waiting(struct btrfs_path *path, int level); - void btrfs_set_lock_blocking(struct extent_buffer *eb); void btrfs_clear_lock_blocking(struct extent_buffer *eb); #endif |