From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161480AbdAJNdC (ORCPT ); Tue, 10 Jan 2017 08:33:02 -0500 Received: from mx2.suse.de ([195.135.220.15]:40882 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758999AbdAJNc7 (ORCPT ); Tue, 10 Jan 2017 08:32:59 -0500 From: Juergen Gross To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, netdev@vger.kernel.org Cc: boris.ostrovsky@oracle.com, wei.liu2@citrix.com, paul.durrant@citrix.com, Juergen Gross Subject: [PATCH 0/2] xen/net: limit number of tx/rx queues Date: Tue, 10 Jan 2017 14:32:50 +0100 Message-Id: <20170110133252.5346-1-jgross@suse.com> X-Mailer: git-send-email 2.10.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Xen network frontend/backend supports multiple tx/rx queues for one virtual interface. The number of queues supported by the backend is set to the number of cpus of the backend driver domain (usually dom0) and the number of queues requested by the frontend is limited by the number of vcpus of the related guest. On large systems this can lead to ridiculous large number of queues exhausting the required number of grant pages rather quick. To avoid this limit the default maximum on both sides to 8. Both frontend and backend maximum can be individually tuned via module parameters. Juergen Gross (2): xen/netfront: set default upper limit of tx/rx queues to 8 xen/netback: set default upper limit of tx/rx queues to 8 drivers/net/xen-netback/netback.c | 6 ++++-- drivers/net/xen-netfront.c | 6 ++++-- 2 files changed, 8 insertions(+), 4 deletions(-) -- 2.10.2