> On Aug 10, 2022, at 10:07 AM, Yang Shi <shy828301@xxxxxxxxx> wrote: > > On Tue, Aug 9, 2022 at 4:36 PM Yu Zhao <yuzhao@xxxxxxxxxx> wrote: >> >> On Tue, Aug 9, 2022 at 11:16 AM Alex Zhu (Kernel) <alexlzhu@xxxxxx> wrote: >>> >>> >>>> OK, it is hard to tell what it looks like now. But the THPs on the >>>> deferred split list may be on the "low utilization split" list too? >>>> IIUC the major difference is to replace zero-filled subpage to special >>>> zero page, so you implemented another THP split function to handle it? >>>> >>>> Anyway the code should answer the most questions. >>> >>> They can indeed end up on both lists. This did have to be handled when >>> implementing the shrinker. >>> >>> We free the zero filled subpages, while modifying the existing split_huge_page() >>> function. Will follow up that change in another patch. >> >> FYI. This series does it: >> >> https://lore.kernel.org/r/20210731063938.1391602-1-yuzhao@xxxxxxxxxx/ >> >> And this one: >> >> https://lore.kernel.org/r/1635422215-99394-1-git-send-email-ningzhang@xxxxxxxxxxxxxxxxx/ > > Thanks, Yu. I totally forgot about these series. It is time to refresh > my memory. I looked through these patches yesterday. There are indeed parts that are very similar, but the approach taken seems overly complicated compared to what I have written. What’s the status of work on this since last year?
