From: David Ahern <dsahern@gmail.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: KVM mailing list <kvm@vger.kernel.org>
Subject: Re: pci passthrough - VF reset at boot is dropping assigned MAC
Date: Mon, 25 Apr 2011 11:41:42 -0600 [thread overview]
Message-ID: <4DB5B256.5070902@gmail.com> (raw)
In-Reply-To: <1303752659.3431.31.camel@x201>
On 04/25/11 11:30, Alex Williamson wrote:
> So yes, it does change. However, if I set the VF mac instead of using a
> randomly generated one, I get:
>
> # modprobe -r igbvf
> # ip link set eth2 vf 6 mac 02:00:10:91:73:01
> # modprobe igbvf
> # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:"
> igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7
> igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c
> igbvf 0000:01:11.5: Address: 02:00:10:91:73:01
> # modprobe -r igbvf
> # echo 1 > /sys/bus/pci/devices/0000:01:11.5/reset
> # modprobe igbvf
> # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:"
> igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7
> igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c
> igbvf 0000:01:11.5: Address: 02:00:10:91:73:01
> igbvf 0000:01:11.5: Address: 02:00:10:91:73:01
>
> So now it sticks. You're going to get random mac addresses on the VFs
> every time you reload the igb driver (ie. ever boot) anyway (at least
> with these sr-iov cards), so if you need consistent macs, they probably
> need to be set before launching the VM anyway. Thanks,
You lost me on this. I do not have the igbvf driver loaded in the host,
only the guest. I am setting the MAC address for the VF in the host
before launching the VM. The host's igb driver gets loaded at boot only.
David
>
> Alex
>
next prev parent reply other threads:[~2011-04-25 17:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-25 16:28 pci passthrough - VF reset at boot is dropping assigned MAC David Ahern
2011-04-25 16:37 ` Alex Williamson
2011-04-25 16:41 ` David Ahern
2011-04-25 17:30 ` Alex Williamson
2011-04-25 17:41 ` David Ahern [this message]
2011-04-25 18:04 ` David Ahern
2011-04-25 18:36 ` Alex Williamson
2011-04-25 19:12 ` David Ahern
2011-04-25 19:18 ` Alex Williamson
2011-04-25 20:29 ` David Ahern
2011-04-25 21:17 ` David Ahern
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