On Thu, Feb 24, 2022 at 05:06:38PM +0800, Wang Jianchao (Kuaishou) wrote:

Hi Jens

This patchset is working on our v4.18 kernel to provide the capacity
for upgrade blk-rq-qos policies on the fly w/o needing to restart
machine and applications.

Why would you upgrade kernel code at runtime?  And how is what you do
on some randm old kernel relevant for mainline?