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Re: [Xen-devel] igb pciback and e1000e pciback not work.

To: ?????? <xnhp0320@xxxxxxxxx>
Subject: Re: [Xen-devel] igb pciback and e1000e pciback not work.
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sun, 5 Sep 2010 13:47:33 +0300
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On Sun, Sep 05, 2010 at 10:55:35AM +0800, ?????? wrote:
>    I'm using Xen 4.01 and jeremy's pvops kernel, the kernel version is
>    At first I want to test the performance of pci passthrough  when it comes
>    to the network card 82571EB
>    I'm using the Jeremy's kernel as DomU kernel too.
>    And I found if the interface is not connected, I mean the network card
>    receives no packet, ( the network card doesn't connect to the switch ),
>    it's fine. when I connect it to a switch , I got a lot of "Detected Tx
>    Unit Hang" in dmesg of the DomU kernel
>    and a kernel oops saying:
>    Pid: 0, comm: swapper Not tained #4
>    warn_slowpath_fmt+0x41/0x50
>    the ooops image is in the attachment of this post.
>    I've checked the mailing list, some one said it's about the e1000e driver
>    with a wrong
>    config of the EEPROM.
>    So I switch to use the network card 82575EB with igb driver
>    It seems to work well,Â
>    until I find it can't receive any packets in DomU.
>    And I see a lot of packets dropped when I ifconfig these interfaces.
>    Anyone knows how to deal with this ?


The latest kernel version in xen/stable-2.6.32.x branch is
Dunno if it has any fixes that are relevant to you.

Anyway, did you read: http://wiki.xensource.com/xenwiki/XenPCIpassthrough

-- Pasi

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