Re: [PATCH 1/2] sched/wait: Break up long wake list walk

[Tim Chen]

On 08/24/2017 01:44 PM, Mel Gorman wrote:
> On Thu, Aug 24, 2017 at 11:16:15AM -0700, Linus Torvalds wrote:
>> On Thu, Aug 24, 2017 at 10:49 AM, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx> wrote:
>>>
>>> These changes look fine.  We are testing them now.
>>> Does the second patch in the series look okay to you?
>>
>> I didn't really have any reaction to that one, as long as Mel&co are
>> ok with it, I'm fine with it.
>>
> 
> I've no strong objections or concerns. I'm disappointed that the
> original root cause for this could not be found but hope that eventually a
> reproducible test case will eventually be available. Despite having access
> to a 4-socket box, I was still unable to create a workload that caused
> large delays on wakeup. I'm going to have to stop as I don't think it's
> possible to create on that particular machine for whatever reason.
> 

Kan helped to test the updated patch 1 from Linus.  It worked fine.
I've refreshed the patch set that includes all the changes
and send a version 2 refresh of the patch set separately.

Thanks.

Tim