netdev - Re: unintended ipv4 broadcast policy change

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Message-ID: <20110624100121.63bbc93a@nehalam.ftrdhcpuser.net>
Date:	Fri, 24 Jun 2011 10:01:21 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	herbert@...dor.hengli.com.au, netdev@...r.kernel.org
Subject: Re: unintended ipv4 broadcast policy change

On Thu, 23 Jun 2011 14:08:21 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> From: Stephen Hemminger <shemminger@...tta.com>
> Date: Thu, 23 Jun 2011 17:01:37 -0400
> 
> > Standard Debian stable (Squeeze) installation.
> > $ dpkg -S /sbin/dhclient
> > isc-dhcp-client: /sbin/dhclient
> 
> I bet what happens is that since it isn't reading from
> the AF_PACKET socket the receive queue just fills up
> and it's just in the kernel dropping packets in
> packet_spkt_rcv().

I don't think that is correct, just instrumented /proc/net/packet
to add receive queue length is stuck at 0. The packets are getting
dropped somewhere else.



sk               RefCnt Type Proto  Iface R Rmem   User   Inode  Count
ffff880327038000 3      10   0003   3     1 0      0      5881   0
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