Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755828AbbLAQaw (ORCPT ); Tue, 1 Dec 2015 11:30:52 -0500 Received: from mail-wm0-f44.google.com ([74.125.82.44]:35325 "EHLO mail-wm0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754350AbbLAQav (ORCPT ); Tue, 1 Dec 2015 11:30:51 -0500 MIME-Version: 1.0 In-Reply-To: <1448983985.25582.35.camel@edumazet-glaptop2.roam.corp.google.com> References: <1448961223-41888-4-git-send-email-sunil.kovvuri@gmail.com> <01d101d12c46$2de43b40$89acb1c0$@samsung.com> <1448983985.25582.35.camel@edumazet-glaptop2.roam.corp.google.com> Date: Tue, 1 Dec 2015 22:00:49 +0530 Message-ID: Subject: Re: [PATCH 3/6] net: thunderx: Increase transmit queue length From: Sunil Kovvuri To: Eric Dumazet Cc: Pavel Fedin , Linux Netdev List , LKML , LAKML , Sunil Goutham , Sunil Goutham Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1131 Lines: 34 Hi Pavel Fedin, Increasing descriptor ring size will lead to more memory allocation. And what you are seeing is a memory alloc failure and doesn't seem to be due to this driver change. I mean it looks like the behavior will be same for other drivers as well. Probably you might have to set "coherent_pool" size in bootargs to a higher value. Can you please check. Thanks, Sunil. On Tue, Dec 1, 2015 at 9:03 PM, Eric Dumazet wrote: > On Tue, 2015-12-01 at 17:40 +0300, Pavel Fedin wrote: >> Hello! >> >> This one breaks networking on my machine: >> --- cut --- >> swiotlb: coherent allocation failed for device 0002:01:08.4 size=4198400 >> CPU: 2 PID: 3655 Comm: NetworkManager Tainted: G W O 4.2.6+ #201 >> Hardware name: Cavium ThunderX CN88XX > > Are you sure 4.2.6 kernel is suitable for backporting this patch aimed > for linux-4.5 ? > > > -- 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/