From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zoltan Kiss Subject: Re: [PATCH net-next 0/2] xen-netback: Changes around carrier handling Date: Mon, 4 Aug 2014 16:34:22 +0100 Message-ID: <53DFA7FE.3000507@citrix.com> References: <1407165658-20146-1-git-send-email-zoltan.kiss@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Cc: David Vrabel , , , To: Wei Liu , Ian Campbell Return-path: In-Reply-To: <1407165658-20146-1-git-send-email-zoltan.kiss@citrix.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 04/08/14 16:20, Zoltan Kiss wrote: > This series starts using carrier off as a way to purge packets when the guest is > not able (or willing) to receive them. It is a much faster way to get rid of > packets waiting for an overwhelmed guest. > The first patch changes current netback code where it relies currently on > netif_carrier_ok. > The second turns off the carrier if the guest times out on a queue, and only > turn it on again if that queue (or queues) resurrects. > > Signed-off-by: Zoltan Kiss > Signed-off-by: David Vrabel > Cc: netdev@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: xen-devel@lists.xenproject.org > Sorry, I forgot to include v2 in the subject header, and the version history for the second patch: v2: - added a lot more comments - fixing the bit checking in RX interrupt - move out the bulk of the code from the main thread function into xenvif_rx_purge_event Zoli