NetBSD 5.1_RC3 Xen problem: user-triggered panic when using a Xen kernel

[Steven Senator <sts%senator.org@localhost>]

Hello,

I am in the process of collecting sufficient information to submit a proper bug report, but I have found a repeatable panic when using the Xen kernel distributed with NetBSD 5.1 RC3.  This problem does not occur when using the distributed NetBSD 5.1_RC3 kernel.

To reproduce:

  A. Boot Xen dom0 kernel

       I have tried with varying amounts of dom0_mem, up to 8GB, without effect. No other Xen domU need be running.

  B. run dd if=/dev/zero of=<some-file> bs=1048576 count=8192

      This command will cause a panic at an arbitrary point in file creation, within a few (3-5) minutes.

       This is a common command to run to create initial domU file-backed partitions.

System configuration:

 3 1.8Ghz Opteron 4-core cpus

 24 GB RAM

 Disks: 3 Intel X-25M SSD, 80GB

 Motherboard: SuperMicro H8QME-2+

 RAIDframe configuration of wd1, wd2 into a mirror. wd0 is configured as the hot spare.

 NetBSD boot manager on raid0.

 Currently no swap/dump is configured. I will add in an external drive for that so that I can capture a system dump and submit the formal problem.

 Thank you,

 -Steve Senator

 sts%senator.net@localhost