linux-kernel - Re: [PATCH v14 079/138] mm/filemap: Add readahead

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Date:   Tue, 10 Aug 2021 22:34:50 +0100
From:   David Howells <dhowells@...hat.com>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     dhowells@...hat.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v14 079/138] mm/filemap: Add readahead_folio()

Matthew Wilcox (Oracle) <willy@...radead.org> wrote:

> The pointers stored in the page cache are folios, by definition.
> This change comes with a behaviour change -- callers of readahead_folio()
> are no longer required to put the page reference themselves.  This matches
> how readpage works, rather than matching how readpages used to work.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> Reviewed-by: Christoph Hellwig <hch@....de>

For some of the things I'm looking at, this is actually inconvenient, but I
guess I can take an extra ref if I need it.

Reviewed-by: David Howells <dhowells@...hat.com>