On Thu, Aug 9, 2018 at 10:22 AM, Jens Axboe <axboe@xxxxxxxxx> wrote: > On 7/20/18 6:29 PM, Liu Bo wrote: >> When an application's iops has exceeded its cgroup's iops limit, surely it >> is throttled and kernel will set a timer for dispatching, thus IO latency >> includes the delay. >> >> However, the dispatch delay which is calculated by the limit and the >> elapsed jiffies is suboptimal. As the dispatch delay is only calculated >> once the application's iops is (iops limit + 1), it doesn't need to wait >> any longer than the remaining time of the current slice. > > Looks good to me - can you resend against my for-4.19/block branch, as > it doesn't apply. > Sure, I'll rebase against it. thanks, liubo
