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[Xen-users] Re: kernel error when I setup the network

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Re: kernel error when I setup the network
From: "Shu Hung (Koala)" <koalay.dg21@xxxxxxxxx>
Date: Tue, 8 Nov 2005 18:48:18 +0800
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I tested again. Here is the details:

  • 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@xxxxxxxxx>:
Dear all,

I have installed a minimal Fedora according to Fedora Xen Quickstart .
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?

Koala Yeung

Technical Support, DigitalOne Limited
Tel: 8100-2616 / 2545-1383   Fax: 2815-0593
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