linux-kernel - Re: [PATCH v6 16/27] mm/filemap: Add unlock

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Message-ID: <20210406135121.GO3062550@infradead.org>
Date:   Tue, 6 Apr 2021 14:51:21 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-cachefs@...hat.com,
        linux-afs@...ts.infradead.org
Subject: Re: [PATCH v6 16/27] mm/filemap: Add unlock_folio

On Wed, Mar 31, 2021 at 07:47:17PM +0100, Matthew Wilcox (Oracle) wrote:
> Convert unlock_page() to call unlock_folio().  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 24 bytes of text for the
> kernel as a whole, but any path that uses unlock_folio() will execute
> 4 fewer instructions.

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>