Re: [PATCH v14 007/138] mm: Add folio_put()

[Mike Rapoport]

On Thu, Jul 15, 2021 at 04:34:53AM +0100, Matthew Wilcox (Oracle) wrote:
> If we know we have a folio, we can call folio_put() instead of put_page()
> and save the overhead of calling compound_head().  Also skips the
> devmap checks.
> 
> This commit looks like it should be a no-op, but actually saves 684 bytes
> of text with the distro-derived config that I'm testing.  Some functions
> grow a little while others shrink.  I presume the compiler is making
> different inlining decisions.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx>
> Reviewed-by: David Howells <dhowells@xxxxxxxxxx>
> ---
>  include/linux/mm.h | 33 ++++++++++++++++++++++++++++-----
>  1 file changed, 28 insertions(+), 5 deletions(-)

Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>