From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Cress Subject: [PATCH 0/4] pch_gbe: avoiding transmit timeouts (rev3) Date: Thu, 26 Jul 2012 11:57:09 -0400 Message-ID: <20120726155709.GA10287@telcoserv5> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netdev@vger.kernel.org Return-path: Received: from mail-vb0-f46.google.com ([209.85.212.46]:58906 "EHLO mail-vb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752436Ab2GZPzg (ORCPT ); Thu, 26 Jul 2012 11:55:36 -0400 Received: by vbbff1 with SMTP id ff1so1792402vbb.19 for ; Thu, 26 Jul 2012 08:55:36 -0700 (PDT) Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: When the interface is stressed with 6 VLANs, some transmit timeout stats were observed, which is a potential precursor to the more severe netdev watchdog timeout oops. Also we saw more than the expected number of transmit restarts, which impacted performance. The following patches were applied and resolved the symptom of the transmit timeout stats, and reduced the number of transmit restarts. This patch set includes the following patches: 0001-pch_gbe-fix-transmit-watchdog-timeout.patch 0002-pch_gbe-add-extra-clean-tx.patch (includes bumping the version to 1.01) 0003-pch_gbe-vlan-skb-len-fix.patch This rev3 has the following changes: * Removed Fix-the-checksum-fill-to-the-error-location.patch for now so Hongbo can evaluate/revise/test based on feedback. The resulting pch_gbe 1.01 driver has been tested on Kontron Tunnel Creek EG20T modules and Intel Crown Bay EG20T modules, so I believe that these are appropriate for consideration in the upstream pch_gbe driver. Please review and comment. Thanks, Andy