netdev - Re: [GIT] Networking

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Message-ID: <1367512467.4000.7.camel@dcbw.foobar.com>
Date:	Thu, 02 May 2013 11:34:27 -0500
From:	Dan Williams <dcbw@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>,
	hayeswang <hayeswang@...ltek.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Network Development <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [GIT] Networking

On Wed, 2013-05-01 at 18:28 -0700, Linus Torvalds wrote:
> On Wed, May 1, 2013 at 1:47 PM, David Miller <davem@...emloft.net> wrote:
> >
> > Highlights (1721 non-merge commits, this has to be a record of some
> > sort):
> 
> Lowlight: it completely breaks my machine with r8169 ethernet.  In the
> networkmanager applet, it claims no cable connection, which is a bit
> odd, because (a) it works with an older kernel and (b) the kernel
> messages actually say
> 
>   r8169 0000:01:00.0 eth0: link up

NM calls ETHTOOL_GLINK and if that returns success, NM expects the
driver to support carrier detection.  NM then listens to netlink for
device flags changes, and uses IFF_LOWER_UP to determine carrier on/off
state.  NM does not use NETIF_F_VLAN_CHALLENGED or any of the other
ETHTOOL_GFEATURES flags yet, but will in the future.

Is the link status accurately reflected by /sys/class/net/eth0/carrier ?

Dan


> but nothing actually works.
> 
>  r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
>  r8169 0000:01:00.0 eth0: RTL8168d/8111d at 0xffffc90010ece000,
> e0:cb:4e:95:1a:d7, XID 083000c0 IRQ 53
>  r8169 0000:01:00.0 eth0: jumbo features [frames: 9200 bytes, tx
> checksumming: ko]
> 
> Any ideas?
> 
>                   Linus
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