From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: [PATCHv1 0/3 net-next] xen-netback: guest Rx queue drain and stall fixes Date: Wed, 22 Oct 2014 14:08:52 +0100 Message-ID: <1413983335-8307-1-git-send-email-david.vrabel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain Cc: David Vrabel , , Ian Campbell , Wei Liu To: Return-path: Received: from smtp02.citrix.com ([66.165.176.63]:19173 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933328AbaJVNJY (ORCPT ); Wed, 22 Oct 2014 09:09:24 -0400 Sender: netdev-owner@vger.kernel.org List-ID: This series fixes two critical xen-netback bugs. 1. Netback may consume all of host memory by queuing an unlimited number of skb on the internal guest Rx queue. This behaviour is guest triggerable. 2. Carrier flapping under high traffic rates which reduces performance. The first patch is a prerequite. Removing support for frontends with feature-rx-notify makes it easier to reason about the correctness of netback since it no longer has to support this outdated and broken mode. David