[OmniOS-discuss] r151014 KVM crash

[Dan McDonald]

> On Apr 6, 2015, at 4:20 AM, Johan Kragsterman <johan.kragsterman at capvert.se> wrote:
> 
> 
> One of them is a Linux terminal server, and when I wanted to update/upgrade it, both the general OS and the chroot environments I got in it, it crashed. I tried several times, and every time I did it, it crashed. It seems to run without problems when I don't do any heavy work on it, but with this update/upgrade, it runs for about ~5 min, then it crashes. It can't get started again, until I reboot the server.

I've been running KVM on my 014 build box for the past day or two.

I've encountered one problem similar to your so far.  It manifests in boot time, where I will see this message while the guest kernel (OpenIndiana in this case) loads:

	microfind: cpu is too fast

and get an instant, no-core-dump reboot.  I can catch this in KMDB and have the debugger available to me.  In illumos this can occur one of two places:

	http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/i86pc/io/microfind.c#117

	http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/i86pc/io/microfind.c#193

Both are in the microfind areas.  I don't know this area of the kernel very well, but I know people who do.  One thing *I* did was restart my qemu process.  Once I did that things *appeared* to be back to normal.  I'm running my KVM in the global zone currently, with this script (a variation of the one we provide on the OmniOS wiki):

--------------
r151014(~)[0]% cat oi-start.sh 
#!/usr/bin/bash

## NOTE:  This must be run as super user.

# configuration
VNIC=oi0
# Sample zvol path.
ROOTHDD=/dev/zvol/dsk/rpool/oi-disk
DATAHDD=/dev/zvol/dsk/data/oi-data-disk
CD=/export/home/danmcd/isos/oi-dev-151a8-text-x86.iso
VNC=1
# Memory for the KVM instance, in Megabytes (2^20 bytes).
MEM=8192

MAC=`dladm show-vnic -po macaddress $VNIC`

#NOTE: Add 
#	-boot cd \
# between -name and -enable-kvm if need be.

/usr/bin/qemu-system-x86_64 \
-name "$(basename $CD)" \
-enable-kvm \
-vnc 0.0.0.0:$VNC \
-smp 4 \
-m $MEM \
-no-hpet \
-localtime \
-drive file=$ROOTHDD,if=ide,index=0 \
-drive file=$DATAHDD,if=ide,index=1 \
-drive file=$CD,media=cdrom,if=ide,index=2  \
-net nic,vlan=0,name=net0,model=e1000,macaddr=$MAC \
-net vnic,vlan=0,name=net0,ifname=$VNIC \
-vga std \
-daemonize

if [ $? -gt 0 ]; then
    echo "Failed to start VM"
fi

# UDP port for VNC connections to the KVM instance.  5900 is added in the command.
port=`expr 5900 + $VNC`
public_nic=$(dladm show-vnic|grep vnic1|awk '{print $2}')
public_ip=$(ifconfig $public_nic|grep inet|awk '{print $2}')

echo "Started VM:"
echo "Public: ${public_ip}:${port}"
-----------------

I did not directly correspond these to error messages of your sort, but the times looks right.  I'm curious myself as to what these might be.

Dan