netdev - Re: [PATCH 3/3] net: core: add IFLA

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Message-ID: <20100311121239.14944fd5@nehalam>
Date:	Thu, 11 Mar 2010 12:12:39 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] net: core: add IFLA_STATS64 support

On Thu, 11 Mar 2010 20:57:29 +0100
Jan Engelhardt <jengelh@...ozas.de> wrote:

> `ip -s link` shows interface counters truncated to 32 bit. This is
> because interface statistics are transported only in 32-bit quantity
> to userspace. This commit adds a new IFLA_STATS64 attribute that
> exports them in full 64 bit.
> 
> References: http://lkml.indiana.edu/hypermail/linux/kernel/0307.3/0215.html
> Signed-off-by: Jan Engelhardt <jengelh@...ozas.de>
> 

What is the point since net_device_stats has only 32 bit counters.
The last time this came up the issue was is that is not possible
to atomically increment a 64 bit counter on most 32 bit platforms.
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