netdev - Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

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Message-ID: <CAP-MU4P9wXNwgagFNVL4WCK2Xn29hX+DUa=zvBncC8h4c+FMMg@mail.gmail.com>
Date:	Tue, 24 Mar 2015 07:53:24 -0700
From:	Shannon Nelson <shannon.nelson@...el.com>
To:	jacob jacob <opstkusr@...il.com>
Cc:	Stefan Assmann <sassmann@...hat.com>, Bandan Das <bsd@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	QEMU Developers <qemu-devel@...gnu.org>,
	kvm-devel <kvm@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

On Tue, Mar 24, 2015 at 7:13 AM, jacob jacob <opstkusr@...il.com> wrote:
> After update to latest firmware and using version 1.2.37 of i40e
> driver, things are looking better with PCI passthrough.
>
> ]# ethtool -i eth3
> driver: i40e
> version: 1.2.37
> firmware-version: f4.33.31377 a1.2 n4.42 e1930
> bus-info: 0000:00:07.0
> supports-statistics: yes
> supports-test: yes
> supports-eeprom-access: yes
> supports-register-dump: yes
> supports-priv-flags: yes

I'm glad the updates helped as we expected.

>
> There are still issues running dpdk 1.8.0 from the VM using the pci
> passthrough devices and looks like it puts the devices in a bad state.
> i40e driver will not bind after this happens and a host reboot is
> required to recover.

Did you make sure to unbind the i40e device from pci-stub after you
were done with using it in the VM?

> I'll post further updates as i make progress.
> Thanks for all the help.
>

Good luck,
sln
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