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

[èé <xnhp0320@xxxxxxxxx>]

Thank you for your advise.

I update the kernel and xen to the newest version. Now both Dom0 and DomU's kernels are 2.6.32.21-xen

still the e1000e driver in DomU complains about the "Detected Tx Unit Hang", but there is no kernel oops.Â

It seems the new kernel has fixed a bug about pciback.

Maybe I should change theÂ/etc/xen/xend-pci-permissive.sxp and /etc/xen/xend-pci-quirks.sxp file ,because I found this in Dom0 dmesg:

[ Â385.007473] pciback 0000:09:00.1: Driver tried to write to a read-only configuration space field at offset 0xe8, size 2. This may be harmless, but if you have problems with your device:

[ Â385.007475] 1) see permissive attribute in sysfs

[ Â385.007475] 2) report problems to the xen-devel mailing list along with details of your device obtained from lspci.

note: 09:00.0 is the pci interface I move to DomU .

But I don't know how to change this.

I remove the e1000e driver in Dom0 , still it can't fix the problem.

Anyone knows about that?

thanks.

2010/9/5 Pasi KÃrkkÃinen <pasik@xxxxxx>

On Sun, Sep 05, 2010 at 10:55:35AM +0800, ?????? wrote:
> Â ÂI'm using Xen 4.01 and jeremy's pvops kernel, the kernel version is
> Â Â2.6.32.18.

>  ÂAt first I want to test the performance of pci passthrough à when it comes

> Â Âto the network card 82571EB
>
> Â ÂI'm using the Jeremy's kernel 2.6.32.18 as DomU kernel too.
>
> Â ÂAnd I found if the interface is not connected, I mean the network card
> Â Âreceives no packet, ( the network card doesn't connect to the switch ),
> Â Âit's fine. when I connect it to a switch , I got a lot of "Detected Tx
> Â ÂUnit Hang" in dmesg of the DomU kernel
> Â Âand a kernel oops saying:
>
> Â ÂPid: 0, comm: swapper Not tained 2.6.32.18-xen #4
> Â Âwarn_slowpath_fmt+0x41/0x50
>
> Â Âthe ooops image is in the attachment of this post.
>
> Â ÂI've checked the mailing list, some one said it's about the e1000e driver
> Â Âwith a wrong
> Â Âconfig of the EEPROM.
>
> Â ÂSo I switch to use the network card 82575EB with igb driver

> Â ÂIt seems to work well,Ã

> Â Âuntil I find it can't receive any packets in DomU.
> Â ÂAnd I see a lot of packets dropped when I ifconfig these interfaces.
> Â ÂAnyone knows how to deal with this ?
>

Hello,

The latest kernel version in xen/stable-2.6.32.x branch is 2.6.32.21.
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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