From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thadeu Lima de Souza Cascardo Subject: Re: [PATCH] mlx4_en: fix transmit of packages when blue frame is enabled Date: Mon, 3 Oct 2011 17:53:58 -0300 Message-ID: <20111003205358.GB3596@oc1711230544.ibm.com> References: <1317388995-411-1-git-send-email-cascardo@linux.vnet.ibm.com> <953B660C027164448AE903364AC447D2235D9A8C@MTLDAG02.mtl.com> <20111003143721.GA3596@oc1711230544.ibm.com> <953B660C027164448AE903364AC447D2235DAA9D@MTLDAG02.mtl.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "netdev@vger.kernel.org" , Eli Cohen , "eli@dev.mellanox.co.il" , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org To: Yevgeny Petrilin Return-path: Received: from e24smtp01.br.ibm.com ([32.104.18.85]:34050 "EHLO e24smtp01.br.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756841Ab1JCUyS (ORCPT ); Mon, 3 Oct 2011 16:54:18 -0400 Received: from mailhub3.br.ibm.com (mailhub3.br.ibm.com [9.18.232.110]) by e24smtp01.br.ibm.com (8.14.4/8.13.1) with ESMTP id p93MDfiZ024146 for ; Mon, 3 Oct 2011 18:13:41 -0400 Received: from d24av01.br.ibm.com (d24av01.br.ibm.com [9.8.31.91]) by mailhub3.br.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p93KvX45929896 for ; Mon, 3 Oct 2011 17:57:39 -0300 Received: from d24av01.br.ibm.com (loopback [127.0.0.1]) by d24av01.br.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p93Krvi4019208 for ; Mon, 3 Oct 2011 17:53:57 -0300 Content-Disposition: inline In-Reply-To: <953B660C027164448AE903364AC447D2235DAA9D@MTLDAG02.mtl.com> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, Oct 03, 2011 at 02:56:08PM +0000, Yevgeny Petrilin wrote: > > Hello, Yevgeny. > > > > We use a MT26448 (lspci -v output bellow) on a POWER7. Any other > > information, tests or debug patches you want me to try, just tell me. > > > > I expected this was really not the proper fix, but thought it would be > > better to send it than just guess. Any clues what the problem might be? > > Perhaps, we would have to disable blue frame for this particular device? > > > > Regards, > > Cascardo. > > > > --- > > lspci output > > 0006:01:00.0 Ethernet controller: Mellanox Technologies MT26448 [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0) > > --- > > lspci -v output > > 0006:01:00.0 0200: 15b3:6750 (rev b0) > > Subsystem: 1014:0416 > > Flags: bus master, fast devsel, latency 0, IRQ 31 > > Memory at 3da47be00000 (64-bit, non-prefetchable) [size=1M] > > Memory at 3da47c000000 (64-bit, prefetchable) [size=32M] > > Expansion ROM at 3da47bf00000 [disabled] [size=1M] > > Capabilities: [40] Power Management version 3 > > Capabilities: [48] Vital Product Data > > Capabilities: [9c] MSI-X: Enable+ Count=128 Masked- > > Capabilities: [60] Express Endpoint, MSI 00 > > Capabilities: [100] Alternative Routing-ID Interpretation (ARI) > > Capabilities: [148] Device Serial Number 00-02-c9-03-00-0f-50-be > > Kernel driver in use: mlx4_core > > Kernel modules: mlx4_en, mlx4_core > > --- > > Cascardo, > > Can you also send me the output of ethtool -i? > It seems that there is a problem with write combining on Power processors, we will check this issue. > > Yevgeny Hello, Yevgeny. You will find the output of ethtool -i below. I am copying Ben and powerpc list, in case this is an issue with Power processors. They can provide us some more insight into this. Thanks, Cascardo. --- # ethtool -i eth10 driver: mlx4_en version: 1.5.4.1 (March 2011) firmware-version: 2.9.4130 bus-info: 0006:01:00.0