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xen-users
Re: [Xen-users] Problem with delegated hardware (Realtek Network driver
Edson Marquezani Filho wrote:
On Sat, Feb 27, 2010 at 17:49, Luciano Coutinho Barcellos
<luciano@xxxxxxxxxxxxxxxxx> wrote:
Dear friends,
I've googled a lot before giving up and come here to ask for some help. All
I've found about my problem was a pretty old single message with no reply
since it was post on Jul 19th, 2007.
I hope to have better luck and find some light to solve the problem. I want
to configure a domU, with 3 nics (identified as having the Realtek 8139D
chip) delegated to it. Everything works almost great except for the message
shown when I try to ifconfig any card:
SIOCSIFFLAGS: Cannot allocate memory.
Considering the following:
- The cards work fine on dom0;
- Delegating a card with chipset Via works on domU;
- Everything is fine with passthrough, card detection and module
loading in domU.
What could be the problem?
I've read something about an old b44 driver which suffered from a
limitation about memory allocation. It needed memory from the first physical
16MB. Could it be a similar problem?
My configuration is the folowing:
- dom0 kernel command line includes:
pciback.hide=(00:08.0)(00:09.0)(00:0a.0)
- domU configuration file has: pci = [ '00:08.0', '00:09.0', '00:0a.0'
]
- xen hypervisor: 3.2.1-i386 from Debian Lenny repositories
- linux kernel for both dom0 and domU: 2.6.26-2-xen-686 from Debian
Lenny repositories
- kernel module used for the nics: 8139too
Hope to get some help.
I see you are using Debian. Are you aware of what Debian Wiki says
about pci passthrough on Lenny [1]? In few words, it says that it's
possible only if you run kernel 2.6.18 (Etch's one) for both dom0 and
domU.
Actualy, I didn't tested it but I assumed it as being true and didn't
even try to configure pci passthroug with kernel 2.6.26.
Anyway, you say it has worked for you and I do believe. =) But, there
may be some issue related to the kernel you are using. I would try
some more "traditional" Xen kernel. =)
Just a clue. I hope this can help you a little bit. =)
[1] http://wiki.debian.org/Xen#Installationonlenny
Thank you very much, Edson. I've just tried with the 2.6.18 kernel
from Etch and it just worked. I've manually downloaded and installed the
linux-image
(http://packages.debian.org/etch/linux-image-2.6.18-6-xen-686) and
linux-modules
(http://packages.debian.org/etch/i386/linux-modules-2.6.18-6-xen-686/download)
from Etch.
Now the dom0 shows a lot of 4gb seg fixup messages in console, but
that's another question, and I think I can fix it as I've seen about
that before.
Thanks again. Valeu! :)
Luciano.
luciano.vcf
Description: Vcard
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