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Re: [Xen-devel] Re: HVM DomU, msi_translate=0, MSI/MSI-X PCI passthrough

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: HVM DomU, msi_translate=0, MSI/MSI-X PCI passthrough fails.
From: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Date: Wed, 8 Dec 2010 18:15:01 +0100
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Mark Adams <mark@xxxxxxxxxxxxxxxxxx>
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It seems Jeremy has had some troubles with the Intel 82754L as well.

Don't know if he has got those resolved, or has to use workarounds ?


What kernel are you using in your domU ? Also the 2.6.32 debian ?
Perhaps it's also worth a try to test a newer intel driver/kernel ?


Wednesday, December 8, 2010, 6:01:25 PM, you wrote:

>> > Just a recap:
>> >      you pass through:
>> >      - 3 physical nics/IGB
>> >      - 1 ISDN pci ISDN box
>> The redfone box runs on 1 of the nics - its not seperate. It converts
>> ISDN to TDMoE see here.. http://www.red-fone.com/
>> >      - all using msi/msi-x interrupts ?
>> I tried using msi/msi-x interrupts, but it caused the raid card to drop
>> off (after some use) and provided seemingly even worse performance than
>> pegging everything back to legacy.

> Were you able to get a serial log and hit all of the differetn debug options
> when the the RAID card died?
>> > 
>> > Have you tried using a PV domU instead of a HVM domU ?
>> I initially tried PV but had issues with the igb NIC's. There was
>> another thread somewhere about my issues with that.

> Hmm, the only other thread I see from you is about the RAID.
>> > Have you tried passing through only the ISDN box, and let the network run 
>> > with the xen backend/frontend to rule out the IGB/network stuff ?

> Mr. Sander idea of isolating one piece by piece is the right way.

> There is a bunch of warnings in the QEMU output - some of them quite .. 
> troubling.

> You seem to have issues with gntdev (as in, not found), but if you are using 
> OpenSuSE
> then that would work - I think. When you tested xen-unstable did you use the
> OpenSUSE kernel or the PV-OPS one?

Best regards,
 Sander                            mailto:linux@xxxxxxxxxxxxxx

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