On Thu, 28 Jun 2018 13:35:15 +0800 "Huang\, Ying" <ying.huang@xxxxxxxxx> wrote: > Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes: > > > 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. > > No problem. I will rebase the patchset on your latest -mm tree, or the > next version to be released? We need to figure that out with Matthew. Probably the xarray conversions are simpler and more mature so yes, probably they should be staged first.
