On Thu, 28 Jun 2018 13:29:09 +0800 "Huang\, Ying" <ying.huang@xxxxxxxxx> wrote: > Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes: > > > On Fri, 22 Jun 2018 11:51:30 +0800 "Huang, Ying" <ying.huang@xxxxxxxxx> wrote: > > > >> This is the final step of THP (Transparent Huge Page) swap > >> optimization. After the first and second step, the splitting huge > >> page is delayed from almost the first step of swapout to after swapout > >> has been finished. In this step, we avoid splitting THP for swapout > >> and swapout/swapin the THP in one piece. > > > > It's a tremendously good performance improvement. It's also a > > tremendously large patchset :( > > > > And it depends upon your > > mm-swap-fix-race-between-swapoff-and-some-swap-operations.patch and > > mm-fix-race-between-swapoff-and-mincore.patch, the first of which has > > been floating about since February without adequate review. > > > > I'll give this patchset a spin in -mm to see what happens and will come > > back later to take a closer look. But the best I can do at this time > > is to hopefully cc some possible reviewers :) > > Thanks a lot for your help! Hope more people can review it! I took it out of -mm again, temporarily. Due to a huge tangle with the xarray conversions in linux-next.
