Re: [PATCH] mm/page_alloc: validate zonelist slots against concurrent rebuilds

[Gregory Price]

On Thu, Oct 15, 2026 at 05:05:39PM -0400, Gregory Price (Meta) wrote:
> Onlining the first block of a zone (e.g. via virtio-mem or a DIMM)
> rebuilds every node's zonelists in place. An allocation in flight can
> then be served from a zone it never asked for: a GFP_KERNEL allocation
> can get a page from ZONE_MOVABLE.
>

Sashiko pointed out some other race conditions (related, different),
i'm going to repackage this one with those fixes because they're likely
to conflict and they'll all want to be backported together.

~Gregory