From patchwork Thu Feb 4 22:10:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 579175 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 929CB140BAD; Fri, 5 Feb 2016 09:10:37 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1aRS6k-0004qn-07; Thu, 04 Feb 2016 22:10:34 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1aRS6b-0004nZ-2S for kernel-team@lists.ubuntu.com; Thu, 04 Feb 2016 22:10:25 +0000 Received: from 1.general.kamal.us.vpn ([10.172.68.52] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1aRS6Y-0006iR-CC; Thu, 04 Feb 2016 22:10:22 +0000 Received: from kamal by fourier with local (Exim 4.82) (envelope-from ) id 1aRS6V-00027S-KI; Thu, 04 Feb 2016 14:10:19 -0800 From: Kamal Mostafa To: Wei Liu Subject: [4.2.y-ckt stable] Patch "xen-netback: respect user provided max_queues" has been added to the 4.2.y-ckt tree Date: Thu, 4 Feb 2016 14:10:18 -0800 Message-Id: <1454623818-8116-1-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 X-Extended-Stable: 4.2 Cc: Ian Campbell , Kamal Mostafa , kernel-team@lists.ubuntu.com, David Vrabel , Johnny Strom , "David S. Miller" X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled xen-netback: respect user provided max_queues to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue This patch is scheduled to be released in version 4.2.8-ckt4. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 4.2.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ---8<------------------------------------------------------------ From 0e19f574ebaad338432fb79e00685a437538c411 Mon Sep 17 00:00:00 2001 From: Wei Liu Date: Thu, 10 Sep 2015 11:18:57 +0100 Subject: xen-netback: respect user provided max_queues commit 4c82ac3c37363e8c4ded6a5fe1ec5fa756b34df3 upstream. Originally that parameter was always reset to num_online_cpus during module initialisation, which renders it useless. The fix is to only set max_queues to num_online_cpus when user has not provided a value. Reported-by: Johnny Strom Signed-off-by: Wei Liu Reviewed-by: David Vrabel Acked-by: Ian Campbell Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- drivers/net/xen-netback/netback.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) -- 1.9.1 diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 4fe3e13..b90b116 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -2002,8 +2002,11 @@ static int __init netback_init(void) if (!xen_domain()) return -ENODEV; - /* Allow as many queues as there are CPUs, by default */ - xenvif_max_queues = num_online_cpus(); + /* Allow as many queues as there are CPUs if user has not + * specified a value. + */ + if (xenvif_max_queues == 0) + xenvif_max_queues = num_online_cpus(); if (fatal_skb_slots < XEN_NETBK_LEGACY_SLOTS_MAX) { pr_info("fatal_skb_slots too small (%d), bump it to XEN_NETBK_LEGACY_SLOTS_MAX (%d)\n",