Re: [PATCHv2 2/2] block: adjust CFS request expire time

[Bart Van Assche]

Where is patch 1/2 of this series? I don't see it in my mailbox.

On 2/20/24 03:45, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>
>
> According to current policy, CFS's may suffer involuntary IO-latency by

Did you perhaps mean "cause" instead of "suffer"?

> being preempted by RT/DL tasks or IRQ.

For which workloads? Sequential I/O or random I/O? If it is for random I/O,
please take a look at patch "scsi: ufs: core: Add CPU latency QoS support
for UFS driver"
(https://lore.kernel.org/all/20231219123706.6463-1-quic_mnaresh@xxxxxxxxxxx/)
and let us know whether or not the Power Management Quality of Service (PM QoS)
framework is perhaps a better solution.

Thanks,

Bart.