From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: unintended ipv4 broadcast policy change Date: Fri, 24 Jun 2011 10:01:21 -0700 Message-ID: <20110624100121.63bbc93a@nehalam.ftrdhcpuser.net> References: <20110623081614.213a432f@nehalam.ftrdhcpuser.net> <20110623.134504.1261579649197526589.davem@davemloft.net> <20110623170137.69054c83@s6510.ftrdhcpuser.net> <20110623.140821.674961342350404546.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: herbert@gondor.hengli.com.au, netdev@vger.kernel.org To: David Miller Return-path: Received: from mail.vyatta.com ([76.74.103.46]:45132 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750850Ab1FXRB0 (ORCPT ); Fri, 24 Jun 2011 13:01:26 -0400 In-Reply-To: <20110623.140821.674961342350404546.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 23 Jun 2011 14:08:21 -0700 (PDT) David Miller wrote: > From: Stephen Hemminger > 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