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Date:	Sat, 1 Jan 2011 19:51:35 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Florian Mickler <florian@...kler.org>
Cc:	Jeff Mahoney <jeffm@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>, balbir@...ux.vnet.ibm.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] taskstats: Use better ifdef for alignment

On Sat, Jan 01, 2011 at 05:19:46PM +0100, Florian Mickler wrote:
> Is there already a patch available or integrated into iotop which
> fixes this? I'd think that if the kernel could wait on fixed iotop's to
> be distributed it would be easier to sell the breakage on bugzilla &
> co...
> 

The story is that 4be2c95d1f "taskstats: pad taskstats netlink response
for aligment issues on ia64" broke iotop on 64 bit processors (32 bit
was unaffected).  This patch fixes it for x86-64 and powerpc-64.

On the other 64 bit processors iotop works but instead you get a message
in dmesg:
kernel unaligned access to 0xe000023879dca9bc, ip=0xa000000100133d10

So on those arches you were already getting posts to bugzilla etc.  Now
those people can upgrade the kernel and download iotop version 0.4.2 or
higher.

regards,
dan carpenter

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