linux-kernel - Re: [PATCH 0/3] implement readpages() for block device to optimize sequential read

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Message-Id: <20140814150425.dfbb6c7eb7ab250e985dac28@linux-foundation.org>
Date:	Thu, 14 Aug 2014 15:04:25 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Akinobu Mita <akinobu.mita@...il.com>
Cc:	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Jeff Moyer <jmoyer@...hat.com>, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/3] implement readpages() for block device to optimize
 sequential read

On Tue,  5 Aug 2014 23:38:31 +0900 Akinobu Mita <akinobu.mita@...il.com> wrote:

> This patchset implements readpages() operation for block device by
> using mpage_readpages() which can create multipage BIOs instead of
> BIOs for each page and reduce system CPU time consumption.

Patchset is simple and straightforward enough.  But who the 
heck cares about the performance of buffered reads from /dev/XXX?
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