On 8/24/21 11:05 AM, Bart Van Assche wrote:
> The block layer may call the I/O scheduler .finish_request() callback
> without having called the .insert_requests() callback. Make sure that the
> mq-deadline I/O statistics are correct if the block layer inserts an I/O
> request that bypasses the I/O scheduler. This patch prevents that lower
> priority I/O is delayed longer than necessary for mixed I/O priority
> workloads.
>
> Cc: Niklas Cassel <Niklas.Cassel@xxxxxxx>
> Cc: Damien Le Moal <damien.lemoal@xxxxxxx>
> Cc: Hannes Reinecke <hare@xxxxxxx>
> Reported-by: Niklas Cassel <Niklas.Cassel@xxxxxxx>
> Fixes: 08a9ad8bf607 ("block/mq-deadline: Add cgroup support")
This one is a little confusing, since that commit got reverted...
Yet the patch still applies.
Shouldn't it be:
Fixes: 38ba64d12d4c ("block/mq-deadline: Track I/O statistics")
--
Jens Axboe
