Re: [PATCH] mm: prevent VMA generation reuse from skipping readers

[Lorenzo Stoakes (ARM)]

NAK.

You're making VMAs a cache line bigger.

Since this is the second time you've done this - stop sending patches to mm, we
don't want your AI slop, thanks.

(In future you'll likely be ignored.)

On Thu, Oct 15, 2026 at 11:37:35PM +0900, Daehyeon Ko wrote:
> Both values are 32-bit. After 2^31 complete mmap write-lock acquisitions,
> an old VMA stamp can alias the live odd generation. vma_start_write() then
> returns without waiting for an existing reader.

This is really unclear, I guess, as before, a member of the core team (likely
me) will assess this to see if there's anything actually valid here.

--
Cheers, Lorenzo