Re: [RFC v2 09/14] mm: Support order-1 folios in the page cache

Hannes Reinecke
2024-02-13T15:03:09Z

On 2/13/24 10:37, Pankaj Raghav (Samsung) wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
>
> 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>
> ---
> include/linux/huge_mm.h | 7 +++++--
> mm/filemap.c | 2 --
> mm/huge_memory.c | 23 ++++++++++++++++++-----
> mm/internal.h | 4 +---
> mm/readahead.c | 3 ---
> 5 files changed, 24 insertions(+), 15 deletions(-)
>
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes