Re: REGRESSION BISECTED: mq-deadline: covert to use request_queue->async_depth

[Yu Kuai]

Hi,

在 2026/4/10 13:18, Doug Smythies 写道:
>> Do you ever use the async_depth for mq-deadline?
> No.

Then the only difference is the tag wake batch is changed from 1 to 8. However,
batch wake up is the base design of sbitmap. And I do admit tail latency is
bad under high concurrency is probably due to wake up is unfair, this is a
know sbitmap design flaw and not fixed yet.

You could try change wake up batch back to 1. However, I don't think this is a
good solution. And I'll suggest you to try increase nr_requests to see if tail
latency gets better.

Per

-- 
Thansk,
Kuai