Xen users - Nov 2005 - kernel error when I setup the network

Dear all,

I have installed a minimal Fedora according to Fedora Xen
Quickstart<http://www.fedoraproject.org/wiki/FedoraXenQuickstart>
.
Everything was fine:

   - I installed Xen supported kernel with rpm
   - I started xend as the guide described: "service xend start"
   - I confirmed my installation by "xm list"
   - I configured a unprivileged Domain named "Domain-1.fc4"
   - I started that "Domain-1.fc4" with "xm create -c
Domain-1.fc4"
   - The Domain loaded successfully and I was in the unprivleged domain
   - I logged in as root.
   - I worked arround the domain
      - changed some text file
      - list directories to see
   - I then tried to bring up the network with commands:
      - ifconfig eht0 up

Just after I brought the eth0 interface up, console starts to pop up
messages repeatly:

printk: 4 messages suppressed.
Memory squeeze in netback driver.

I go to domain 0 with another window and tried to stop the Domain-1.fc4

xm shutdown Domain-1.fc4

Things remains unchanged. I still see Domain-1.fc4 on the list "xm
list".
I then tried to stop the whole Xen by "service xend stop" same message
still pop up in the old window.

I checked /var/log/messages of Domain-0 and I found this message is
repeating there too:

Nov 8 16:57:15 sandbox kernel: printk: 4 messages suppressed.
Nov 8 16:57:15 sandbox kernel: xen_net: Memory squeeze in netback driver.

What is the problem?


Thanks,
Koala Yeung


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I tested again. Here is the details:

Occurance

   - just after I started the Domain-1, I logined root and typed this
   command:
      - ifconfig eth0 up
      - two errors repeatly pop-up to the screen:
      - printk: 4 messages suppressed.
      Memory squeeze in netback driver.
      - (XEN) (file=page_alloc.c, line=558) Over-allocation for domain
      0: 32769> 32768
      (XEN) (file=page_alloc.c, line=560) ...or the domain is dying
      (0)
      (XEN) (file=memory.c, line=57) Could not allocate order=0
      extent: id=0 flags=0(0 of 64)
      - I log in to the Domain-0 with SSH
   - I shutdown Domain-1 with command: xm shutdown Domain-1
   - I looked at the screen of Domain-1, the 2 messages didn''t stop
   poping up
   - in Domain-0, the /var/log/message repeating this message
      - Nov 8 18:43:11 sandbox kernel: printk: 4 messages suppressed.
      Nov 8 18:43:11 sandbox kernel: xen_net: Memory squeeze in
      netback driver.
   - I stopped the xend with command "service xend stop"
   - the process of xend (xenblkd) didn''t stop running nad message
didn''t
   stop
   - I tried to kill xenblkd with kill -9
   - still cannot stop the process






2005/11/8, Shu Hung (Koala)
<koalay.dg21@gmail.com>:
>
> Dear all,
>
> I have installed a minimal Fedora according to Fedora Xen
Quickstart<http://www.fedoraproject.org/wiki/FedoraXenQuickstart>
> .
> Everything was fine:
>
>    - I installed Xen supported kernel with rpm
>    - I started xend as the guide described: "service xend start"
>    - I confirmed my installation by " xm list"
>    - I configured a unprivileged Domain named "Domain-1.fc4"
>    - I started that "Domain-1.fc4" with "xm create -c
Domain-1.fc4 "
>    - The Domain loaded successfully and I was in the unprivleged domain
>    - I logged in as root.
>    - I worked arround the domain
>       - changed some text file
>       - list directories to see
>    - I then tried to bring up the network with commands:
>       - ifconfig eht0 up
>
> Just after I brought the eth0 interface up, console starts to pop up
> messages repeatly:
>
> printk: 4 messages suppressed.
> Memory squeeze in netback driver.
>
> I go to domain 0 with another window and tried to stop the Domain-1.fc4
>
>  xm shutdown Domain-1.fc4
>
> Things remains unchanged. I still see Domain-1.fc4 on the list "xm
list ".
> I then tried to stop the whole Xen by "service xend stop" same
message
> still pop up in the old window.
>
> I checked /var/log/messages of Domain-0 and I found this message is
> repeating there too:
>
> Nov 8 16:57:15 sandbox kernel: printk: 4 messages suppressed.
> Nov 8 16:57:15 sandbox kernel: xen_net: Memory squeeze in netback driver.
>
> What is the problem?
>
>
> Thanks,
> Koala Yeung
>


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Tel: 8100-2616 / 2545-1383 Fax: 2815-0593


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