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Date: Tue, 10 Aug 2021 18:04:34 +0200 From: Vlastimil Babka <vbabka@...e.cz> To: "Matthew Wilcox (Oracle)" <willy@...radead.org>, linux-kernel@...r.kernel.org Cc: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, Christoph Hellwig <hch@....de>, Jeff Layton <jlayton@...nel.org>, "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>, William Kucharski <william.kucharski@...cle.com>, David Howells <dhowells@...hat.com> Subject: Re: [PATCH v14 017/138] mm/filemap: Add folio_unlock() On 7/15/21 5:35 AM, Matthew Wilcox (Oracle) wrote: > Convert unlock_page() to call folio_unlock(). By using a folio we > avoid a call to compound_head(). This shortens the function from 39 > bytes to 25 and removes 4 instructions on x86-64. Because we still > have unlock_page(), it's a net increase of 16 bytes of text for the > kernel as a whole, but any path that uses folio_unlock() will execute > 4 fewer instructions. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org> > Reviewed-by: Christoph Hellwig <hch@....de> > Acked-by: Jeff Layton <jlayton@...nel.org> > Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> > Reviewed-by: William Kucharski <william.kucharski@...cle.com> > Reviewed-by: David Howells <dhowells@...hat.com> Acked-by: Vlastimil Babka <vbabka@...e.cz>
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