Hi All,
I believe that I am suffering a similar problem to some other users
of xVM on OpenSolaris. The observed problem is that Dom0 and all other
domains hang (become unresponsive and never recover) when heavy disk
load occurs in any domain. The problem occurs under 2 circumstances:
a) when a file is used to back a domU disk with high activity ie
install service pack 3; or,
b) there is high disk activity in dom0 ie a dd from a zfs file to zvol.
The problem ceased for case (a) when a zvol was used to back the domU.
System details are as follows:
uname -a
SunOS ra 5.11 snv_90 i86pc i386 i86xpv
/boot/grub/menu.lst
title Solaris xVM with limits
findroot (pool_rpool,0,a)
kernel$ /boot/$ISADIR/xen.gz /boot/$ISADIR/xen.gz dom0_mem=2G
dom0_max_vcpus=2
module$ /platform/i86xpv/kernel/$ISADIR/unix /platform/i86xpv/kernel/
$ISADIR/unix -B $ZFS-BOOTFS
module$ /platform/i86pc/$ISADIR/boot_archive
# svccfg -s xvm/xend listprop
config application
config/dom0-cpus integer 0
config/enable-dump boolean true
config/stability astring Unstable
config/xend-relocation-address astring 127.0.0.1
config/xend-relocation-hosts-allow astring ^localhost$
config/xend-relocation-server boolean true
config/xend-unix-server boolean true
config/vncpasswd astring
doyoureallythinkiwouldpostthistotheweb
config/vnc-listen astring 0.0.0.0
config/default-nic astring nfo0
config/dom0-min-mem integer 2000
xenstored dependency
xenstored/entities fmri svc:/system/xvm/store
xenstored/grouping astring require_all
xenstored/restart_on astring restart
xenstored/type astring service
general framework
general/entity_stability astring Unstable
general/single_instance boolean true
start method
start/exec astring "/lib/svc/method/xend %m"
start/timeout_seconds count 0
start/type astring method
stop method
stop/exec astring :kill
stop/timeout_seconds count 60
stop/type astring method
tm_common_name template
tm_common_name/C ustring "Hypervisor Control
Daemon"
tm_man_xend template
tm_man_xend/manpath astring /usr/share/man
tm_man_xend/section astring 1M
tm_man_xend/title astring xend
tail -1 /etc/system
set zfs:zfs_arc_max = 0x10000000
This is probably just another data point following on from the
discussion about not using dom0 for anything serious; however, the
fixes prescribed don't seem to be entirely successful.
Any further suggestions welcome.
Maurice Castro
PS. Thanks to David Edmonson for persisting with my network fault, the
system is now usable._______________________________________________
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