Re: [PATCH v3 35/40] mm: eliminate VMA_SPECIAL_FLAGS check in lru_gen_look_around()

[Zi Yan]

On Thu Sep 17, 2026 at 12:22 PM EDT, Lorenzo Stoakes (ARM) wrote:
> A kernel-owned or fixed mapping is one which sets VMA_PFNMAP_BIT,
> VMA_MIXEDMAP_BIT or VMA_DONTEXPAND_BIT, which is precisely what
> VMA_SPECIAL_FLAGS tests for other than VMA_IO_BIT, which is safe to drop as
> only kernel-owned mappings may set it.
>
> Using these predicates rather than VMA_SPECIAL_FLAGS makes the check
> self-documenting and helps eliminate the confusion around 'special' flags.
>
> No functional change intended.
>
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@xxxxxxxxxx>
> ---
>  mm/vmscan.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>



-- 
Best Regards,
Yan, Zi