Re: [PATCH v2] mm: convert page type macros to enum

[David Hildenbrand]

On 06.06.24 20:26, Stephen Brennan wrote:
> Changing PG_slab from a page flag to a page type in commit 46df8e73a4a3
> ("mm: free up PG_slab") in has the unintended consequence of removing
> the PG_slab constant from kernel debuginfo. The commit does add the
> value to the vmcoreinfo note, which allows debuggers to find the value
> without hardcoding it. However it's most flexible to continue
> representing the constant with an enum. To that end, convert the page
> type fields into an enum. Debuggers will now be able to detect that
> PG_slab's type has changed from enum pageflags to enum page_type.
>
> Fixes: 46df8e73a4a3 ("mm: free up PG_slab")
>
> Signed-off-by: Stephen Brennan <stephen.s.brennan@xxxxxxxxxx>
> ---
> v1 -> v2: include PAGE_TYPE_BASE and PAGE_MAPCOUNT_RESERVE

This has a conflict with mm/mm-unstable.

--
Cheers,

David / dhildenb