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authorChris Mason <chris.mason@oracle.com>2008-08-15 15:34:18 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:06 -0400
commit53863232ef961778aa414b700ed88a48e8e871e6 (patch)
tree05a74ac264a5fb4f6b8824771f5820ca5907afe5 /fs/btrfs/async-thread.c
parent4854ddd0ed0a687fc2d7c45a529c406232e31e7b (diff)
Btrfs: Lower contention on the csum mutex
This takes the csum mutex deeper in the call chain and releases it more often. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/async-thread.c')
-rw-r--r--fs/btrfs/async-thread.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 958cd8b5f0d7..2ee301740195 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -48,6 +48,7 @@ struct btrfs_worker_thread {
/* number of things on the pending list */
atomic_t num_pending;
+
unsigned long sequence;
/* protects the pending list. */
@@ -242,7 +243,7 @@ static struct btrfs_worker_thread *next_worker(struct btrfs_workers *workers)
worker = list_entry(next, struct btrfs_worker_thread, worker_list);
atomic_inc(&worker->num_pending);
worker->sequence++;
- if (worker->sequence % 4 == 0)
+ if (worker->sequence % workers->idle_thresh == 0)
list_move_tail(next, &workers->worker_list);
return worker;
}