Btrfs: Catch missed bios in the async bio submission thread
The async bio submission thread was missing some bios that were
added after it had decided there was no work left to do.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index d5f4e94..f2e80f3 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -349,6 +349,7 @@
{
struct btrfs_worker_thread *worker = work->worker;
unsigned long flags;
+ int wake = 0;
if (test_and_set_bit(WORK_QUEUED_BIT, &work->flags))
goto out;
@@ -367,10 +368,16 @@
&worker->workers->worker_list);
spin_unlock_irqrestore(&worker->workers->lock, flags);
}
+ if (!worker->working) {
+ wake = 1;
+ worker->working = 1;
+ }
spin_unlock_irqrestore(&worker->lock, flags);
-
+ if (wake)
+ wake_up_process(worker->task);
out:
+
return 0;
}
@@ -397,6 +404,7 @@
}
spin_lock_irqsave(&worker->lock, flags);
+
atomic_inc(&worker->num_pending);
check_busy_worker(worker);
list_add_tail(&work->list, &worker->pending);