Hi Jens, The mq-deadline 'async_depth' sysfs attribute doesn't behave as intended. This patch series fixes the implementation of that attribute. Please consider this patch series for the next merge window. Thanks, Bart. Bart Van Assche (2): block: Call .limit_depth() after .hctx has been set block/mq-deadline: Fix the tag reservation code block/blk-mq.c | 8 +++++--- block/mq-deadline.c | 20 +++++++++++++++++--- 2 files changed, 22 insertions(+), 6 deletions(-)