Re: [PATCH v14 019/138] mm/filemap: Add folio_lock_killable()

[David Howells]

Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote:

> This is like lock_page_killable() but for use by callers who
> know they have a folio.  Convert __lock_page_killable() to be
> __folio_lock_killable().  This saves one call to compound_head() per
> contended call to lock_page_killable().
> 
> __folio_lock_killable() is 19 bytes smaller than __lock_page_killable()
> was.  filemap_fault() shrinks by 74 bytes and __lock_page_or_retry()
> shrinks by 71 bytes.  That's a total of 164 bytes of text saved.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> 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>