Re: [PATCH v9 3/3] blk-cgroup: Flush stats at blkgs destruction path

Waiman Long
2022-11-04T20:21:50Z

On 11/4/22 16:13, Tejun Heo wrote:
> On Fri, Nov 04, 2022 at 04:12:05PM -0400, Waiman Long wrote:
>> I should have named the function cgroup_rstat_css_cpu_flush() to indicate
>> that the cpu is a needed parameter. We can have a cgroup_rstat_css_flush()
>> in the future if the need arises.
>>
>> It is an optimization to call this function only if the corresponding cpu
>> has a pending lockless list. I could do cpu iteration here and call the
>> flushing function for all the CPUs. It is less optimized this way. Since it
>> is a slow path, I guess performance is not that critical. So I can go either
>> way. Please let me know your preference.
> Yeah, cpu_flush is fine. Let's leave it that way.
>
Will do.

Cheers,
Longman