From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: Disabling mergeable rx buffers for the guest
Date: Tue, 16 Jul 2013 12:42:14 +0200
Message-ID: <51E52386.7000005@redhat.com>
References: <58539BF287296F4CB5EC3FF6E0639E07FB101C@ILMB2.corp.radware.com> <51E4E41A.80905@redhat.com> <58539BF287296F4CB5EC3FF6E0639E07FB118C@ILMB2.corp.radware.com> <51E4EB29.4090600@redhat.com> <58539BF287296F4CB5EC3FF6E0639E07FB12B0@ILMB2.corp.radware.com> <51E513F3.4090107@redhat.com> <58539BF287296F4CB5EC3FF6E0639E07FB13F5@ILMB2.corp.radware.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
To: Naor Shlomo <NaorS@Radware.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from mx1.redhat.com ([209.132.183.28]:63015 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1755071Ab3GPKmY (ORCPT <rfc822;kvm@vger.kernel.org>);
	Tue, 16 Jul 2013 06:42:24 -0400
In-Reply-To: <58539BF287296F4CB5EC3FF6E0639E07FB13F5@ILMB2.corp.radware.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Il 16/07/2013 12:40, Naor Shlomo ha scritto:
> Hi Paolo,
> 
> For some unknown reason it suddenly started to accept the changes to the XML and the strings you gave me are now in place.

Good.

> Upon machine start I now receive the following error messages:
> 
> virsh # start NaorDev
> error: Failed to start domain NaorDev
> error: internal error Process exited while reading console log output: kvm: -global: requires an argument"
> 

That's because I cut-and-pasted without reading:

>   <qemu:commandline>
>     <qemu:arg value='-global'/>
>     <qemu:env name='mrg_rxbuf' value='off'/>
>   </qemu:commandline>

The right one is (or at this point I'd better say "should be"):

   <qemu:commandline>
     <qemu:arg value='-global'/>
     <qemu:arg value='virtio-net-pci.mrg_rxbuf=off'/>
   </qemu:commandline>

Paolo

> </domain>
> 
> Naor
> 
> -----Original Message-----
> From: Paolo Bonzini [mailto:pbonzini@redhat.com] 
> Sent: Tuesday, July 16, 2013 12:36 PM
> To: Naor Shlomo
> Cc: kvm@vger.kernel.org
> Subject: Re: Disabling mergeable rx buffers for the guest
> 
> Il 16/07/2013 10:06, Naor Shlomo ha scritto:
>> Thanks again Paolo,
>>
>> I used your string and read the documents in the site you referred me to but could not understand why doesn't it accept the xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0' string.
>>
>> I tried it on the following version:
>> Compiled against library: libvir 0.9.8 Using library: libvir 0.9.8 
>> Using API: QEMU 0.9.8 Running hypervisor: QEMU 1.0.0
>>
>> So according to the site it should be supported.
>>
>> Any idea what am I missing now?
> 
> Not sure.  Can you post here the full XML, and the one you're trying to use?
> 
> Paolo
> 
>> Naor
>>
>> -----Original Message-----
>> From: Paolo Bonzini [mailto:pbonzini@redhat.com]
>> Sent: Tuesday, July 16, 2013 9:42 AM
>> To: Naor Shlomo
>> Cc: kvm@vger.kernel.org
>> Subject: Re: Disabling mergeable rx buffers for the guest
>>
>> Il 16/07/2013 08:40, Naor Shlomo ha scritto:
>>> Hi Paolo and thanks for your quick reply,
>>>
>>> I tried editing (virsh edit) the domain's XML and put the XML excerpt you gave me everywhere but with no success.
>>> The moment I exit the edit mode the text was gone (I guess it didn't pass some sort of sanity and that's why it was automatically erased).
>>>
>>> What am I doing wrong?
>>
>> My fault.  You need to change the <domain> opening tag to
>>
>> <domain type='qemu' 
>> xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
>>
>> See http://libvirt.org/drvqemu.html#qemucommand for the docs.
>>
>> Paolo
>>
>