On 12/16/19 2:34 PM, Tejun Heo wrote: > When over-budget IOs are force-issued through root cgroup, > iocg_kick_delay() adjusts the async delay accordingly but doesn't > actually schedule async throttle for the issuing task. This bug is > pretty well masked because sooner or later the offending threads are > gonna get directly throttled on regular IOs or have async delay > scheduled by mem_cgroup_throttle_swaprate(). > > However, it can affect control quality on filesystem metadata heavy > operations. Let's fix it by invoking blkcg_schedule_throttle() when > iocg_kick_delay() says async delay is needed. Applied, thanks Tejun. -- Jens Axboe
