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Message-ID: <20100311140406.37ee0b83@nehalam> Date: Thu, 11 Mar 2010 14:04:06 -0800 From: Stephen Hemminger <shemminger@...tta.com> To: David Miller <davem@...emloft.net> Cc: jengelh@...ozas.de, netdev@...r.kernel.org Subject: Re: [PATCH 3/3] net: core: add IFLA_STATS64 support On Thu, 11 Mar 2010 12:26:39 -0800 (PST) David Miller <davem@...emloft.net> wrote: > From: Stephen Hemminger <shemminger@...tta.com> > Date: Thu, 11 Mar 2010 12:12:39 -0800 > > > 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. > > On 64-bit it has 64-bit counters, yet we only report 32-bit > counters to userspace via netlink even in that case. That make sense, but maybe we shouldn't send IFLA_STATS64 on 32bit platforms. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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