From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: [Qemu-devel] Hitting 29 NIC limit Date: Thu, 14 Oct 2010 17:17:36 -0500 Message-ID: <4CB78180.7050001@codemonkey.ws> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Richard W.M. Jones" , "Daniel P. Berrange" , Avi Kivity , "kvm@vger.kernel.org" , "qemu-devel@nongnu.org" To: Anjali Kulkarni Return-path: Received: from mail-vw0-f46.google.com ([209.85.212.46]:58715 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756187Ab0JNWRq (ORCPT ); Thu, 14 Oct 2010 18:17:46 -0400 Received: by vws2 with SMTP id 2so87564vws.19 for ; Thu, 14 Oct 2010 15:17:45 -0700 (PDT) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 10/14/2010 05:12 PM, Anjali Kulkarni wrote: > Thanks. Does this work for e1000 as well? > Haven't tried. I don't know how various e1000 drivers would react. > Also, does it support pci hotplug? > No, but that's fixable down the road. Regards, Anthony Liguori > Anjali > > On 10/14/10 3:09 PM, "Anthony Liguori" wrote: > > >> On 10/14/2010 05:00 PM, Anjali Kulkarni wrote: >> >>> Can you send me pointers to the qdev documentation? How can I use it? Will >>> it allow us to scale above the 32 PCI limit? >>> >>> >> It's all below. You just have to create a PCI device and mark the >> multifunction flag to on and then assign it a PCI address that includes >> a function number. Then you can pack 8 virtio PCI devices into a single >> slot. >> >> Regards, >> >> Anthony Liguori >> >> >>> Anjali >>> >>> >>> On 10/14/10 2:57 PM, "Anthony Liguori" wrote: >>> >>> >>> >>>> On 10/14/2010 04:42 PM, Richard W.M. Jones wrote: >>>> >>>> >>>>> On Thu, Oct 14, 2010 at 01:10:47PM +0100, Daniel P. Berrange wrote: >>>>> >>>>> >>>>> >>>>>> Or a PCI bridge to wire up more PCI buses, so we raise the max limit for >>>>>> any type of device we emulate. >>>>>> >>>>>> >>>>>> >>>>> Break the 29/30/31 virtio-blk limit ... please! >>>>> >>>>> >>>>> >>>> It was broken ages ago: >>>> >>>> anthony@howler:~$ wc -l /proc/partitions; tail /proc/partitions >>>> 422 /proc/partitions >>>> 251 1618 1 vdcx2 >>>> 251 1621 489951 vdcx5 >>>> 251 1632 10485760 vdcy >>>> 251 1633 9992398 vdcy1 >>>> 251 1634 1 vdcy2 >>>> 251 1637 489951 vdcy5 >>>> 251 1648 10485760 vdcz >>>> 251 1649 9992398 vdcz1 >>>> 251 1650 1 vdcz2 >>>> 251 1653 489951 vdcz5 >>>> >>>> This is what makes qdev so useful. >>>> >>>> args="" >>>> for slot in 5 6 7 8 9 10 11 12 13 14 15 16 17; do >>>> for fn in 0 1 2 3 4 5 6 7; do >>>> args="$args -drive >>>> >>>> > file=/home/anthony/images/linux.img,if=none,snapshot=on,id=disk${slot}_${fn}>>> > " > >>>> args="$args -device >>>> virtio-blk-pci,addr=${slot}.${fn},drive=disk${slot}_${fn},multifunction=on" >>>> done >>>> done >>>> >>>> x86_64-softmmu/qemu-system-x86_64 -hda ~/images/linux.img ${args} >>>> -enable-kvm -serial stdio >>>> >>>> Regards, >>>> >>>> Anthony Liguori >>>> >>>> >>>> >>>>> Rich. >>>>> >>>>> >>>>> >>>>> >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>>> the body of a message to majordomo@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> >>>> >>> >>> >> >