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From: Anjali Kulkarni <anjali@juniper.net>
Date: Thu, 14 Oct 2010 15:12:14 -0700
Subject: Re: [Qemu-devel] Hitting 29 NIC limit
Message-ID: <C8DCCE4E.301FF%anjali@juniper.net>
In-Reply-To: <4CB77F91.2050801@codemonkey.ws>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "Richard W.M. Jones" <rjones@redhat.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>

Thanks. Does this work for e1000 as well?
Also, does it support pci hotplug?

Anjali

On 10/14/10 3:09 PM, "Anthony Liguori" <anthony@codemonkey.ws> 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? Wi=
ll
>> it allow us to scale above the 32 PCI limit?
>>   =20
>=20
> 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.
>=20
> Regards,
>=20
> Anthony Liguori
>=20
>> Anjali
>>=20
>>=20
>> On 10/14/10 2:57 PM, "Anthony Liguori"<anthony@codemonkey.ws>  wrote:
>>=20
>>   =20
>>> On 10/14/2010 04:42 PM, Richard W.M. Jones wrote:
>>>     =20
>>>> On Thu, Oct 14, 2010 at 01:10:47PM +0100, Daniel P. Berrange wrote:
>>>>=20
>>>>       =20
>>>>> Or a PCI bridge to wire up more PCI buses, so we raise the max limit =
for
>>>>> any type of device we emulate.
>>>>>=20
>>>>>         =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"$args -drive
>>>=20
file=3D/home/anthony/images/linux.img,if=3Dnone,snapshot=3Don,id=3Ddisk${sl=
ot}_${fn}>>>
"
>>>       args=3D"$args -device
>>> virtio-blk-pci,addr=3D${slot}.${fn},drive=3Ddisk${slot}_${fn},multifunc=
tion=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
>>>     =20
>>>> Rich.
>>>>=20
>>>>=20
>>>>       =20
>>> --
>>> 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
>>>     =20
>>   =20
>=20