Re: [PATCH-tip 0/2] locking/rwsem: Rwsem rearchitecture part 2 follow-up patches

[Waiman Long]

On 04/16/2019 09:10 AM, Peter Zijlstra wrote:
> On Mon, Apr 15, 2019 at 04:58:27PM -0400, Waiman Long wrote:
>> This series contain 2 follow-up patches to alleviate the performance
>> regression found in the page_fault1 test of the will-it-scale benchmark.
>> This does not recover all the lost performance, but reclaim a sizeable
>> portion of it.
>>
>> The regression was found on an Intel system. I have run the test on
>> an AMD system. The regression wasn't seen there.  There are only minor
>> variations in performance. Perhaps the page fault path is quite different
>> between Intel and AMD systems.
> Can you please just fold this back into the appropriate patches? Trying
> to review all the back and forth is painful.

I will send out an update part 2 patch with patch 1 of this series
merged into the writer spinning on reader patch. Patch 2 of this series
will be a standalone one.

Cheers,
Longman