Re: [LKP] [mm] 9bc8039e71: will-it-scale.per_thread_ops -64.1% regression

From: Tim Chen
Date: Wed Jan 30 2019 - 19:06:41 EST

On 12/27/18 6:55 PM, Waiman Long wrote:
> On 12/27/2018 08:31 PM, Wang, Kemi wrote:
>> Hi, Waiman
>> Did you post that patch? Let's see if it helps.
> I did post the patch a while ago. I will need to rebase it to a new
> baseline. Will do that in a week or 2.
> -Longman


In a large scale OLTP benchmark, we are also seeing a 1% loss in performance
from patch 9bc8039e71. We'll be interested to try out your patch to
restore some optimistic spinning on reader held sem.