Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751907AbYAOOrt (ORCPT ); Tue, 15 Jan 2008 09:47:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751078AbYAOOrh (ORCPT ); Tue, 15 Jan 2008 09:47:37 -0500 Received: from zcars04f.nortel.com ([47.129.242.57]:56488 "EHLO zcars04f.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751046AbYAOOrg (ORCPT ); Tue, 15 Jan 2008 09:47:36 -0500 Message-ID: <478CC76B.1020804@nortel.com> Date: Tue, 15 Jan 2008 08:47:07 -0600 From: "Chris Friesen" User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jarek Poplawski CC: David Miller , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: questions on NAPI processing latency and dropped network packets References: <20080115071950.GA1696@ff.dom.local> In-Reply-To: <20080115071950.GA1696@ff.dom.local> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 15 Jan 2008 14:47:11.0186 (UTC) FILETIME=[8281A320:01C85785] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1191 Lines: 26 Jarek Poplawski wrote: > IMHO, checking this with a current stable, which probably you are going > to do some day, anyway, should be 100% acceptable: giving some input to > netdev, while still working for yourself. While I would love to do this, it's not that simple. Some of our hardware is not supported on mainline, so we need per-kernel version patches to even bring up the blade. The blades netboot via a jumbo-frame network, so kernel extensions are needed to handle setting the MTU before mounting the rootfs. The blade in question uses CKRM which doesn't exist for newer kernels so the problem may simply be hidden by scheduling differences. The userspace application uses other kernel features that are not in mainline (and likely some of them won't ever be in mainline--I know because I've tried). Basically, the number of changes required for our environment makes it difficult to just boot up the latest kernel. Chris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/