linux-kernel - Re: [PATCH 3/5] pagemap: Make pagemap_read enforce reading in multiples of 8

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Message-Id: <1212681822.3953.162.camel@calx>
Date:	Thu, 05 Jun 2008 11:03:42 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Thomas Tuttle <ttuttle@...gle.com>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] pagemap: Make pagemap_read enforce reading in
	multiples of 8


On Thu, 2008-06-05 at 11:06 -0400, Thomas Tuttle wrote:
> Since kpagecount and kpageflags require reads in multiples of 8, and
> it simplifies add_to_pagemap significantly, I added the same
> requirement to /proc/pid/pagemap.

I'm generally fine with this. Another approach that's perhaps more
friendly is when someone tries to do a 24-byte read, do a 16-byte read,
leaving the file pointer aligned. Not sure if that's completely kosher
though.

-- 
Mathematics is the supreme nostalgia of our time.

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