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

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:
>>   =20
>>> Or a PCI bridge to wire up more PCI buses, so we raise the max limit fo=
r
>>> any type of device we emulate.
>>>     =20
>> Break the 29/30/31 virtio-blk limit ... please!
>>   =20
>=20
> It was broken ages ago:
>=20
> 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
>=20
> This is what makes qdev so useful.
>=20
> args=3D""
> 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=3D"$args -drive
> file=3D/home/anthony/images/linux.img,if=3Dnone,snapshot=3Don,id=3Ddisk${=
slot}_${fn}"
>      args=3D"$args -device
> virtio-blk-pci,addr=3D${slot}.${fn},drive=3Ddisk${slot}_${fn},multifuncti=
on=3Don"
> done
> done
>=20
> x86_64-softmmu/qemu-system-x86_64 -hda ~/images/linux.img ${args}
> -enable-kvm -serial stdio
>=20
> Regards,
>=20
> Anthony Liguori
>=20
>> Rich.
>>=20
>>   =20
>=20
> --
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