From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Jin Subject: [PATCH V2 0/2] limit xen vnic max queues number to online cpus number Date: Fri, 23 Oct 2015 17:17:37 +0800 Message-ID: <5629FB31.5060806@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, xen-devel@lists.xenproject.org To: wei.liu2@citrix.com, Ian Campbell , Boris Ostrovsky , Konrad Rzeszutek Wilk , "David S. Miller" , Jan Beulich Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:41926 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751113AbbJWJRu (ORCPT ); Fri, 23 Oct 2015 05:17:50 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Currently xen vnic allowed to create lots of queues by set module param max_queues(both netback and netfront), when queues number larger than cpus number, it does not help for performance but need more cpu time. This patchset limit netback and netfront max queues number to online cpus number. Joe Jin (2): xen-netback: limit xen vif max queues number to online cpus xen-netfront: limit vnic max_queues number to online cpus --- Changes in v2: - Replace param_get_int to param_get_uint. - Use '%u' for unsigned int when print. - Replace EINVAL to ERANGE when out of range [0-CPUs]. - Reset the perm of max_queues on sysfs to 0644. drivers/net/xen-netback/netback.c | 28 ++++++++++++++++++++++------ drivers/net/xen-netfront.c | 28 ++++++++++++++++++++++------ 2 files changed, 44 insertions(+), 12 deletions(-)