On Fri, 08 Sep 2023 09:42:23 +0200, Vlastimil Babka wrote:
> As Kirill pointed out, mapping can be removed under us due to
> truncation. Test it under folio lock as already done for the async
> compaction / dirty folio case. To prevent locking every folio with
> mapping to do the test, do it only for unevictable folios, as we can
> expect the unmovable mapping folios are also unevictable. To enforce
> that expecation, make mapping_set_unmovable() also set AS_UNEVICTABLE.
>
> [...]
Applied to kvm-x86 guest_memfd, thanks!
[1/1] mm, compaction: make testing mapping_unmovable() safe
https://github.com/kvm-x86/linux/commit/4876a35647b9
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https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes
