在 2020/3/4 上午8:46, Andrew Morton 写道: > > Well, any difference would be small and the numbers did get a bit > lower, albeit probably within the margin of error. > > But you know, if someone were to send a patch which micro-optimized > some code by replacing 'TestClearXXX()' with `if PageXXX() > ClearPageXXX()', I would happily merge it! > > Is this change essential to the overall patchset? If not, I'd be > inclined to skip it? > Hi Andrew, Thanks a lot for comments! Yes, this patch is essential for all next. Consider the normal memory testing would focus on user page, that probabably with PageLRU. Fengguang's vm-scalibicase-small-allocs which used a lots vm_area_struct slab, which may got some impact. 0day/Cheng Rong is working on the test. In my roughly testing, it may drop 5% on my 96threads/394GB machine. Thanks Alex
