Re: [PATCH] mm: Support order-1 folios in the page cache

Dave Chinner
2023-12-06T20:54:06Z

On Wed, Dec 06, 2023 at 08:44:42PM +0000, Matthew Wilcox (Oracle) wrote:
> Folios of order 1 have no space to store the deferred list. This is
> not a problem for the page cache as file-backed folios are never
> placed on the deferred list. All we need to do is prevent the core
> MM from touching the deferred list for order 1 folios and remove the
> code which prevented us from allocating order 1 folios.
>
> Link: https://lore.kernel.org/linux-mm/90344ea7-4eec-47ee-5996-0c22f42d6a6a@google.com/
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Documentation of this structural quirk at the definition of
struct folio?

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com