diff options
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/block/io.c b/block/io.c index 76e7df18d8..4f32d6aa6e 100644 --- a/block/io.c +++ b/block/io.c @@ -593,8 +593,14 @@ static void coroutine_fn tracked_request_end(BdrvTrackedRequest *req) qemu_co_mutex_lock(&req->bs->reqs_lock); QLIST_REMOVE(req, list); - qemu_co_queue_restart_all(&req->wait_queue); qemu_co_mutex_unlock(&req->bs->reqs_lock); + + /* + * At this point qemu_co_queue_wait(&req->wait_queue, ...) won't be called + * anymore because the request has been removed from the list, so it's safe + * to restart the queue outside reqs_lock to minimize the critical section. + */ + qemu_co_queue_restart_all(&req->wait_queue); } /** |