Re: [PATCH] mm: init_mlocked_on_free_v3

[Lance Yang]

Completely agree with David's point[1]. I'm also not convinced that this is the
right approach :)

It seems like this patch won't handle all cases, as David mentioned[1] before.
folio_remove_rmap_ptes() will immediately munlock a large folio (as large folios
are not allowed to be batch-added to the LRU list) via munlock_vma_folio() when
it is fully unmapped, so this patch does not work in this case. Even worse, if
we encounter a COW mlocked folio, we would run into trouble (data corruption).

Hi Andrew, I just noticed that this patch has become part of v6.10-rc1, but it
has not been acked/reviewed yet. Is there any chance to revert it?

[1] https://lore.kernel.org/linux-mm/8118eabf-de9c-41a7-9892-3a1a5bd2071c@xxxxxxxxxx/
[2] https://lore.kernel.org/linux-mm/20240517192239.9285edd85f8ef893bb508a61@xxxxxxxxxxxxxxxxxxxx/

Thanks,
Lance