From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anjali Kulkarni <anjali@juniper.net>
Subject: Re: [Qemu-devel] Hitting 29 NIC limit
Date: Thu, 14 Oct 2010 15:00:02 -0700
Message-ID: <C8DCCB72.301F3%anjali@juniper.net>
References: <4CB77CD0.3030203@codemonkey.ws>
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Cc: "Daniel P. Berrange" <berrange@redhat.com>,
	Avi Kivity <avi@redhat.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
To: Anthony Liguori <anthony@codemonkey.ws>,
	"Richard W.M. Jones" <rjones@redhat.com>
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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?

Anjali


On 10/14/10 2:57 PM, "Anthony Liguori" <anthony@codemonkey.ws> 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.
>> 
>>    
> 
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