Hi,
We've deployed Xen 3.0.2-2 successfully on a CentOS 4.3 installation running
on a Dell PE 2950 servers. On a HVM/VMX guest also running CentOS 4.3 with the
configuration below, we see occasional DMA messages in the guests dmesg output,
they don't occur often and for no obvious reason - it seems they normally
occur when the load on the host system is low.
hda: dma_timer_expiry: dma status == 0x24
hda: DMA interrupt recovery
hda: lost interrupt
Windows 2003 server guests on the same host system don't appear to have any
problems (at least none are logged), but two Linux guests do, the above one
CentOS and a Fedora core 3 system. Does anyone have any idea how to solve this?
<Start Config>
import os, re
arch = os.uname()[4]
if re.search('64', arch):
arch_libdir = 'lib64'
else:
arch_libdir = 'lib'
kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 256
name = "CentOS4.3_01"
vcpus=1
cpus="1"
vif = [ 'type=ioemu, bridge=xenbr0' ]
disk = [ 'phy:/dev/XEN/CentOS4.3_01,ioemu:hda,w' ]
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
#cdrom = '/dev/hda'
boot='c'
sdl=0
vnc=1
vncviewer=1
stdvga=0
serial='pty'
ne2000=0
<End Config>
The second problem we've encountered, which appears not to be listed in the
bug tracker. When any one of these guests is rebooted from inside the guest,
some of the xen guest configuration appears not to be re-read/re-used. For
example, we have noticed this when we have statically allocated the host
cpu's each guest should run on; after a reboot (viewing "xm
vcpu-list") the CPU Affinity changes from the defined one to "any
cpu".
Any help appreciated
Thanks
Nick
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