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From: Matthew Wilcox <willy@infradead.org>
To: linux-fsdevel@vger.kernel.org
Cc: linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com,
	linux-mm@kvack.org, ocfs2-devel@oss.oracle.com,
	linux-ext4@vger.kernel.org, linux-erofs@lists.ozlabs.org,
	linux-btrfs@vger.kernel.org
Subject: Re: [PATCH v5 01/13] mm: Fix the return type of __do_page_cache_readahead
Date: Fri, 14 Feb 2020 11:50:46 -0800
Message-ID: <20200214195046.GC7778@bombadil.infradead.org> (raw)
In-Reply-To: <20200211010348.6872-2-willy@infradead.org>

On Mon, Feb 10, 2020 at 05:03:36PM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> 
> ra_submit() which is a wrapper around __do_page_cache_readahead() already
> returns an unsigned long, and the 'nr_to_read' parameter is an unsigned
> long, so fix __do_page_cache_readahead() to return an unsigned long,
> even though I'm pretty sure we're not going to readahead more than 2^32
> pages ever.

I was going through this and realised it's completely pointless -- the
returned value from ra_submit() and __do_page_cache_readahead() is
eventually ignored through all paths.  So I'm replacing this patch with
one that makes everything return void.

  parent reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11  1:03 [PATCH v5 00/13] Change readahead API Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 01/13] mm: Fix the return type of __do_page_cache_readahead Matthew Wilcox
2020-02-11  8:19   ` Johannes Thumshirn
2020-02-11 12:34     ` Matthew Wilcox
2020-02-12 18:13   ` Christoph Hellwig
2020-02-14  3:19   ` John Hubbard
2020-02-14  4:21     ` Matthew Wilcox
2020-02-14  4:33       ` John Hubbard
2020-02-14 19:50   ` Matthew Wilcox [this message]
2020-02-11  1:03 ` [PATCH v5 02/13] mm: Ignore return value of ->readpages Matthew Wilcox
2020-02-12 18:13   ` Christoph Hellwig
2020-02-11  1:03 ` [PATCH v5 03/13] mm: Put readahead pages in cache earlier Matthew Wilcox
2020-02-14  3:36   ` John Hubbard
2020-02-15  1:15     ` Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 04/13] mm: Add readahead address space operation Matthew Wilcox
2020-02-11  4:52   ` Dave Chinner
2020-02-11 12:54     ` Matthew Wilcox
2020-02-11 20:08       ` Dave Chinner
2020-02-12 18:18   ` Christoph Hellwig
2020-02-14  5:36   ` John Hubbard
2020-02-15  1:15     ` Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 05/13] mm: Add page_cache_readahead_limit Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 06/13] fs: Convert mpage_readpages to mpage_readahead Matthew Wilcox
2020-02-13 22:09   ` Junxiao Bi
2020-02-11  1:03 ` [PATCH v5 07/13] btrfs: Convert from readpages to readahead Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 08/13] erofs: Convert uncompressed files " Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 09/13] erofs: Convert compressed " Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 10/13] ext4: Convert " Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 11/13] f2fs: " Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 12/13] fuse: " Matthew Wilcox
2020-02-11  1:03 ` [PATCH v5 13/13] iomap: " Matthew Wilcox

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