Messages in this thread | | | From | Yu Zhao <> | Date | Tue, 9 Aug 2022 17:35:44 -0600 | Subject | Re: [PATCH v3] mm: add thp_utilization metrics to /proc/thp_utilization |
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On Tue, Aug 9, 2022 at 11:16 AM Alex Zhu (Kernel) <alexlzhu@fb.com> 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@google.com/
And this one:
https://lore.kernel.org/r/1635422215-99394-1-git-send-email-ningzhang@linux.alibaba.com/
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