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-rw-r--r--fs/btrfs/async-thread.c10
-rw-r--r--fs/btrfs/volumes.c11
2 files changed, 18 insertions, 3 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index d5f4e94f2ca2..f2e80f3768ec 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -349,6 +349,7 @@ int btrfs_requeue_work(struct btrfs_work *work)
{
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 @@ int btrfs_requeue_work(struct btrfs_work *work)
&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 @@ int btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work)
}
spin_lock_irqsave(&worker->lock, flags);
+
atomic_inc(&worker->num_pending);
check_busy_worker(worker);
list_add_tail(&work->list, &worker->pending);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index fd0bedb07a64..bcd14ebccae1 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -154,6 +154,7 @@ static noinline int run_scheduled_bios(struct btrfs_device *device)
loop:
spin_lock(&device->io_lock);
+loop_lock:
/* take all the bios off the list at once and process them
* later on (without the lock held). But, remember the
* tail and other pointers so the bios can be properly reinserted
@@ -203,7 +204,7 @@ loop:
* is now congested. Back off and let other work structs
* run instead
*/
- if (pending && bdi_write_congested(bdi) &&
+ if (pending && bdi_write_congested(bdi) && num_run > 16 &&
fs_info->fs_devices->open_devices > 1) {
struct bio *old_head;
@@ -215,7 +216,8 @@ loop:
tail->bi_next = old_head;
else
device->pending_bio_tail = tail;
- device->running_pending = 0;
+
+ device->running_pending = 1;
spin_unlock(&device->io_lock);
btrfs_requeue_work(&device->work);
@@ -224,6 +226,11 @@ loop:
}
if (again)
goto loop;
+
+ spin_lock(&device->io_lock);
+ if (device->pending_bios)
+ goto loop_lock;
+ spin_unlock(&device->io_lock);
done:
return 0;
}