On 8/25/23 01:24, Chengming Zhou wrote:
I don't know the details of the UFS devices bad performance problem. But I feel it maybe caused by the too lazy queue idle handling, which is now only handled in queue timeout work.
Hi Chengming, The root cause of the UFS performance problem is the fair sharing algorithm itself: reducing the active queue count only happens after the request queue timeout has expired. This is way too slow. Last time it was proposed to remove that algorithm Yu Kuai promised to replace it by a better algorithm. Since progress on the replacement algorithm has stalled I'm asking again whether everyone agrees to remove the fairness algorithm. Thanks, Bart.
