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[Xen-users] BUG: unable to handle kernel paging request at virtual address c0f5672c

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "Philippe Vanhaesendonck" <xen@xxxxxxxxxxx>
  • Date: Mon, 23 Jul 2007 12:51:53 +0200 (CEST)
  • Delivery-date: Mon, 23 Jul 2007 03:49:55 -0700
  • Importance: Normal
  • List-id: Xen user discussion <xen-users.lists.xensource.com>


I am using Xen 3.1 (32 Bits PAE -- tarball download) on a debian Etch system.

When starting a DomU, I get on the console:
Checking if this processor honours the WP bit even in supervisor mode...
<1>BUG: unable to handle kernel paging request at virtual address c0f5672c

and in xm dmesg:
(XEN) mm.c:612:d18 Non-privileged (18) attempt to map I/O space 003fc2f2
(XEN) mm.c:3267:d18 ptwr_emulate: could not get_page_from_l1e()

(Se details in attachement)

It does not happen all times, if the DomU boots, then it will run fine for
ages. If it crashes, it is always at boot time at that place. So
workaround is to 'xm create' until it boots...

I can reproduce the problem in basically all the combinations I tried:
- With the Xen hypervisor binary from the Tarball, and the same one
- With the Dom0 Kernel from the Tarball, the same recompiled or the Debian
- With the DomU Kernel from the Tarball, the same recompiled, the Debian
and the RedHat ones

Any suggestion appreciated



Attachment: paging-bug-console.txt
Description: Text document

Attachment: paging-bug-dmesg.txt
Description: Text document

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