Hi,
在 2024/04/16 23:56, Michal Koutný 写道:
On Sat, Apr 06, 2024 at 04:00:53PM +0800, Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:
I'm planning to support build all blk-throttle polices as kernel module,
There is only one blk-throttle policy (especially after your removal of
io.low). Did you mean blkcg policies in general?
Yes, bfq already support that, and others are all rq_qos based, they
will be much easier than blk-throtl.
The current code is complex because of various lifecycles in
devices x cgroups.
Turning policies into modules seems to make it
devices x cgroups x policy modules
.
Could you please add more info why policies as modules is beneficial,
how to keep complexity capped?
First of all, users can only load these policies when they need, and
reduce kernel size; Then, when these policies is not loaded, IO fast
path will be slightly shorter, and save some memory overhead for each
disk.
Thanks,
Kuai
Thanks,
Michal
