On 04/16/2019 10:17 AM, Peter Zijlstra wrote: > On Tue, Apr 16, 2019 at 09:18:50AM -0400, Waiman Long wrote: >> 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. > Hmm, in that case I can fold it back too. So hold off on sending it. > > I thought #2 was a fixup for an earlier patch as well.
#2 is a performance fix. Cheers, Longman
