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[Xen-devel] Possible bug in 3.0.2 - "Manager is watching"

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "McFadden, Gordon" <gordon_mcfadden@xxxxxxxxx>
  • Date: Thu, 1 Jun 2006 14:58:08 -0700
  • Delivery-date: Fri, 02 Jun 2006 05:47:14 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcaFxndKeafiY+eJR3SaQ41JECSq2Q==
  • Thread-topic: Possible bug in 3.0.2 - "Manager is watching"


I call this one the “Manager is watching” bug since it *only* happens during demonstrations.

Really.  I am not kidding.  Caused me some, er,  awkward moments not once, but twice.



Actually, the reason may be more prosaic.  Here is the situation.


I am using FC4 on an EM64T host with the Xen mods – VT enabled.


I have two VMs.  VM1 is Win XP (32 bit), VM2 is RHEL4U1 (32 bits) booting to run level 3.


In most case this works fine.  However, if I run a vnc server in the FC4 host so I can dempo the system,

 then as soon as I start VM2, the host immediately crashes and reboots.


I am running the stock x11vnc server.  I am guessing that this is related to memory, so for the record, here is how memory is setup.


Physical host has 2 Gig.

            Kernel /xen.gz dom0_mem=1024M

            Dom0-min-mem = 196


VM1 memory

            Memory = 512


VM2 memory

            Memory = 1024


When both start normally (that is, when vnc server is not running), the memory in dom0 goes down to about 290M.


I am going to try and narrow things down more, but I am wondering if any one else has seen this behavior?



Gordon McFadden
System Architect
Channel Platform Group
Intel Corporation
ph:   +1 503 264 4309


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