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v1 2026-08-29

修复hugetlb降级surplus计数 · v1

修复 hugetlb demote 路径两问题：保持源 hstate 盈余计数，并限制 demote 不超出当前可用空闲页。

原始补丁链接

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子 Patch（2）

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mm/hugetlb: preserve source surplus accounting during demotion
[mm/hugetlb: preserve source surplus accounting during demotion] From: Longlong Xia xialonglong@kylinos.cn demote_pool_huge_page() currently removes every source folio as a persistent folio. A free
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mm/hugetlb: cap demotion at currently available free pages
[mm/hugetlb: cap demotion at currently available free pages] From: Longlong Xia xialonglong@kylinos.cn Demotion must not remove free huge pages that back existing reservations. The sysfs path check
v2 →