From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752270AbdA3Ff5 (ORCPT ); Mon, 30 Jan 2017 00:35:57 -0500 Received: from aserp1050.oracle.com ([141.146.126.70]:48560 "EHLO aserp1050.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751922AbdA3Ffh (ORCPT ); Mon, 30 Jan 2017 00:35:37 -0500 Subject: Re: [PATCH 0/2] xen/net: limit number of tx/rx queues To: Juergen Gross , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, netdev@vger.kernel.org References: <20170110133252.5346-1-jgross@suse.com> Cc: wei.liu2@citrix.com, paul.durrant@citrix.com From: Boris Ostrovsky Message-ID: <7b27cfa9-fbda-1c05-c6f5-1519e3fce5ef@oracle.com> Date: Sun, 29 Jan 2017 21:55:23 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 MIME-Version: 1.0 In-Reply-To: <20170110133252.5346-1-jgross@suse.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: aserp1040.oracle.com [141.146.126.69] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/10/2017 08:32 AM, Juergen Gross wrote: > 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(-) > Applied to for-linus-4.11 -boris From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Re: [PATCH 0/2] xen/net: limit number of tx/rx queues Date: Sun, 29 Jan 2017 21:55:23 -0500 Message-ID: <7b27cfa9-fbda-1c05-c6f5-1519e3fce5ef@oracle.com> References: <20170110133252.5346-1-jgross@suse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Cc: paul.durrant@citrix.com, wei.liu2@citrix.com To: Juergen Gross , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, netdev@vger.kernel.org Return-path: In-Reply-To: <20170110133252.5346-1-jgross@suse.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" List-Id: netdev.vger.kernel.org CgpPbiAwMS8xMC8yMDE3IDA4OjMyIEFNLCBKdWVyZ2VuIEdyb3NzIHdyb3RlOgo+IFRoZSBYZW4g bmV0d29yayBmcm9udGVuZC9iYWNrZW5kIHN1cHBvcnRzIG11bHRpcGxlIHR4L3J4IHF1ZXVlcyBm b3Igb25lCj4gdmlydHVhbCBpbnRlcmZhY2UuIFRoZSBudW1iZXIgb2YgcXVldWVzIHN1cHBvcnRl ZCBieSB0aGUgYmFja2VuZCBpcwo+IHNldCB0byB0aGUgbnVtYmVyIG9mIGNwdXMgb2YgdGhlIGJh Y2tlbmQgZHJpdmVyIGRvbWFpbiAodXN1YWxseSBkb20wKQo+IGFuZCB0aGUgbnVtYmVyIG9mIHF1 ZXVlcyByZXF1ZXN0ZWQgYnkgdGhlIGZyb250ZW5kIGlzIGxpbWl0ZWQgYnkgdGhlCj4gbnVtYmVy IG9mIHZjcHVzIG9mIHRoZSByZWxhdGVkIGd1ZXN0Lgo+Cj4gT24gbGFyZ2Ugc3lzdGVtcyB0aGlz IGNhbiBsZWFkIHRvIHJpZGljdWxvdXMgbGFyZ2UgbnVtYmVyIG9mIHF1ZXVlcwo+IGV4aGF1c3Rp bmcgdGhlIHJlcXVpcmVkIG51bWJlciBvZiBncmFudCBwYWdlcyByYXRoZXIgcXVpY2suCj4KPiBU byBhdm9pZCB0aGlzIGxpbWl0IHRoZSBkZWZhdWx0IG1heGltdW0gb24gYm90aCBzaWRlcyB0byA4 LiBCb3RoCj4gZnJvbnRlbmQgYW5kIGJhY2tlbmQgbWF4aW11bSBjYW4gYmUgaW5kaXZpZHVhbGx5 IHR1bmVkIHZpYSBtb2R1bGUKPiBwYXJhbWV0ZXJzLgo+Cj4gSnVlcmdlbiBHcm9zcyAoMik6Cj4g ICB4ZW4vbmV0ZnJvbnQ6IHNldCBkZWZhdWx0IHVwcGVyIGxpbWl0IG9mIHR4L3J4IHF1ZXVlcyB0 byA4Cj4gICB4ZW4vbmV0YmFjazogc2V0IGRlZmF1bHQgdXBwZXIgbGltaXQgb2YgdHgvcnggcXVl dWVzIHRvIDgKPgo+ICBkcml2ZXJzL25ldC94ZW4tbmV0YmFjay9uZXRiYWNrLmMgfCA2ICsrKyst LQo+ICBkcml2ZXJzL25ldC94ZW4tbmV0ZnJvbnQuYyAgICAgICAgfCA2ICsrKystLQo+ICAyIGZp bGVzIGNoYW5nZWQsIDggaW5zZXJ0aW9ucygrKSwgNCBkZWxldGlvbnMoLSkKPgoKQXBwbGllZCB0 byBmb3ItbGludXMtNC4xMQoKLWJvcmlzCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54 ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK