Re: [PATCH v10 1/8] mm: fix stale ZONE_DEVICE refcount comment
From: Mike Rapoport
Date: Sun Aug 16 2026 - 08:05:03 EST
On Mon, 10 Aug 2026 20:20:50 +0800, Li Zhe <lizhe.67@xxxxxxxxxxxxx> wrote:
> The comment in __init_zone_device_page() still uses the old
> MEMORY_TYPE_* names and implies that FS_DAX pages regain a
> refcount of 1 in the free path. That no longer matches the code.
>
> Update the comment to describe the current policy correctly:
> MEMORY_DEVICE_GENERIC pages regain a refcount of 1 in the free path,
> while the remaining ZONE_DEVICE types start from 0 here and raise the
> count again when the allocator or driver hands the page out.
>
> [...]
Reviewed-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
--
Sincerely yours,
Mike.