Xen 3.0.2 /3.0.3 | No Swap in DomU

[Merc]

Hello.

I have set up Xen 3.0.2 and 3.0.3 using the howto "http://www.howtoforge.com/debian_sarge_xen_3.0.3".

The Dom0-system and the DomU-system are running on Debian 3.1.

So far it works, except for some (minor) problems.

First:
If I use the compiled xen-kernel (the one created with "make world" and "make install"), the host system works fine, no problems at all.

If I use the xen0-kernel, created by using "make linux-2.6-xen0-config CONFIGMODE=menuconfig KERNELS="linux-2.6-xen0"" (step 4.2 in the above mentioned howto), i get some ugly load-problems using the host system.
I.e. copying a file from /dev/hdc1 to /dev/hda4 takes forever, the kjournald takes 99,9% of cpu time (the same happens if I use ftp to copy anything to the host machine).
So working with the xen0-kernel is not possible.


Second:
I ran into some problems with my virtual machines.
They start up ok and run without problems as long as I don't do anything that requires a large amount of memory.

The problem: the VM's don't use swap memory. The config file looks like this:

name="vm01"
kernel="/boot/vmlinuz-2.6.16.29-xenU"
root="/dev/sda1"
memory=128
disk=['file:/mnt/storage/vserver/vm01.img,sda1,w','file:/mnt/storage/vserver/vm01-swap.img,sda2,w']

# network
#vif = ['mac=00:00:00:00:00:01' ,'bridge=xenintbr']
vif = ['ip=10.80.0.2']
dhcp ="off"
ip="10.80.0.2"
netmask="255.0.0.0"
gateway="10.80.0.254"
hostname="vm01"

extra="3"

So the VM should be able to use swap.

Output of "cat /proc/partitions" inside the VM:

major minor #blocks name

8 1 1024000 sda1
8 2 512000 sda2

I honestly don't understand why the virtual machines don't use swap at all.

I recently purged hotplug, replacing it with udev, but that didn't change a thing (even compiled a new kernel).

I would appreciate any help.

Regards,
Merc


ps:
I searched the xen-source-forum but didn't find a solution to the above mentioned problems.
The swap-problem was mentioned there, but no solution (it was said using udev instead of hotplug would solve the problem, but it didn't, at least not for me).

[falko]

Hm... Sounds strange.
Are there any errors in your log files (on dom0 and domU)?

[Merc]

Hello.

Thanks for your reply.

I'll post the output of the log files.

from "less /var/log/xen/xend.log" in dom0:

[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) XendDomainInfo.create(['vm', ['name', 'vm01'], ['memory', 128], ['vcpus', 1], ['image', ['
linux', ['kernel', '/boot/vmlinuz-2.6.16.29-xenU'], ['ip', '10.80.0.2:1.2.3.4:10.80.0.254:255.0.0.0:vm01:eth0:off'], ['root', '/dev/sda1'], ['args', '3']]], ['
device', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm01.img'], ['dev', 'sda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm0
1-swap.img'], ['dev', 'sda2'], ['mode', 'w']]], ['device', ['vif', ['ip', '10.80.0.2']]]])
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) parseConfig: config is ['vm', ['name', 'vm01'], ['memory', 128], ['vcpus', 1], ['image', [
'linux', ['kernel', '/boot/vmlinuz-2.6.16.29-xenU'], ['ip', '10.80.0.2:1.2.3.4:10.80.0.254:255.0.0.0:vm01:eth0:off'], ['root', '/dev/sda1'], ['args', '3']]], [
'device', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm01.img'], ['dev', 'sda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm
01-swap.img'], ['dev', 'sda2'], ['mode', 'w']]], ['device', ['vif', ['ip', '10.80.0.2']]]]
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) parseConfig: result is {'shadow_memory': None, 'uuid': None, 'on_crash': None, 'on_reboot'
: None, 'localtime': None, 'image': ['linux', ['kernel', '/boot/vmlinuz-2.6.16.29-xenU'], ['ip', '10.80.0.2:1.2.3.4:10.80.0.254:255.0.0.0:vm01:eth0:off'], ['ro
ot', '/dev/sda1'], ['args', '3']], 'on_poweroff': None, 'bootloader_args': None, 'cpus': None, 'name': 'vm01', 'backend': [], 'vcpus': 1, 'cpu_weight': None, '
features': None, 'vcpu_avail': None, 'memory': 128, 'device': [('vbd', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm01.img'], ['dev', 'sda1'], ['mode', 'w']]
), ('vbd', ['vbd', ['uname', 'file:/mnt/storage/vserver/vm01-swap.img'], ['dev', 'sda2'], ['mode', 'w']]), ('vif', ['vif', ['ip', '10.80.0.2']])], 'bootloader'
: None, 'cpu': None, 'maxmem': None}
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) XendDomainInfo.construct: None
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) XendDomainInfo.initDomain: 2 1.0
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) Balloon: 771252 KiB free; need 131072; done.
[2006-11-30 11:17:15 xend 4785] INFO (__init__:1072) buildDomain os=linux dom=2 vcpus=1
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) dom            = 2
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) image          = /boot/vmlinuz-2.6.16.29-xenU
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) store_evtchn   = 1
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) console_evtchn = 2
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) cmdline        =  ip=10.80.0.2:1.2.3.4:10.80.0.254:255.0.0.0:vm01:eth0:off root=/dev/sda1 3
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) ramdisk        = 
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) vcpus          = 1
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) features       = 
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) exception looking up device number for sda1: [Errno 2] No such file or directory: '/dev/sda1'
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'backend-id': '0', 'virtual-device': '2049', 'device-type': 'disk', 'state': '1',
 'backend': '/local/domain/0/backend/vbd/2/2049'} to /local/domain/2/device/vbd/2049.
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'domain': 'vm01', 'frontend': '/local/domain/2/device/vbd/2049', 'dev': 'sda1', '
state': '1', 'params': '/mnt/storage/vserver/vm01.img', 'mode': 'w', 'online': '1', 'frontend-id': '2', 'type': 'file'} to /local/domain/0/backend/vbd/2/2049.
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) exception looking up device number for sda2: [Errno 2] No such file or directory: '/dev/sda2'
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'backend-id': '0', 'virtual-device': '2050', 'device-type': 'disk', 'state': '1',
 'backend': '/local/domain/0/backend/vbd/2/2050'} to /local/domain/2/device/vbd/2050.
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'domain': 'vm01', 'frontend': '/local/domain/2/device/vbd/2050', 'dev': 'sda2', '
state': '1', 'params': '/mnt/storage/vserver/vm01-swap.img', 'mode': 'w', 'online': '1', 'frontend-id': '2', 'type': 'file'} to /local/domain/0/backend/vbd/2/2
050.
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'backend-id': '0', 'mac': '00:16:3e:48:2f:5d', 'handle': '0', 'state': '1', 'back
end': '/local/domain/0/backend/vif/2/0'} to /local/domain/2/device/vif/0.
[2006-11-30 11:17:15 xend 4785] DEBUG (__init__:1072) DevController: writing {'domain': 'vm01', 'handle': '0', 'script': '/etc/xen/scripts/vif-nat', 'ip': '10.
80.0.2', 'state': '1', 'frontend': '/local/domain/2/device/vif/0', 'mac': '00:16:3e:48:2f:5d', 'online': '1', 'frontend-id': '2'} to /local/domain/0/backend/vi
f/2/0.
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) Storing VM details: {'shadow_memory': '0', 'uuid': '6d137699-5651-4836-be87-a9e95e0d911a',
 'on_reboot': 'restart', 'start_time': '1164881835.46', 'on_poweroff': 'destroy', 'name': 'vm01', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', '
memory': '128', 'on_crash': 'restart', 'image': '(linux (kernel /boot/vmlinuz-2.6.16.29-xenU) (ip 10.80.0.2:1.2.3.4:10.80.0.254:255.0.0.0:vm01:eth0:off) (root 
/dev/sda1) (args 3))', 'maxmem': '128'}
[2006-11-30 11:17:15 xend.XendDomainInfo 4785] DEBUG (__init__:1072) Storing domain details: {'console/ring-ref': '225593', 'console/port': '2', 'name': 'vm01'
, 'console/limit': '1048576', 'vm': '/vm/6d137699-5651-4836-be87-a9e95e0d911a', 'domid': '2', 'cpu/0/availability': 'online', 'memory/target': '131072', 'store
/ring-ref': '225594', 'store/port': '1'}
[2006-11-30 11:17:15 xend.XendDomainInfo 3144] DEBUG (__init__:1072) XendDomainInfo.handleShutdownWatch
[2006-11-30 11:17:15 xend 4790] DEBUG (__init__:1072) Waiting for devices vif.
[2006-11-30 11:17:15 xend 4790] DEBUG (__init__:1072) Waiting for 0.
[2006-11-30 11:17:15 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vif/2/0/hotplug-status.
[2006-11-30 11:17:16 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vif/2/0/hotplug-status.
[2006-11-30 11:17:16 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback 1.
[2006-11-30 11:17:16 xend 4790] DEBUG (__init__:1072) Waiting for devices usb.
[2006-11-30 11:17:16 xend 4790] DEBUG (__init__:1072) Waiting for devices vbd.
[2006-11-30 11:17:16 xend 4790] DEBUG (__init__:1072) Waiting for 2049.
[2006-11-30 11:17:16 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vbd/2/2049/hotplug-status.
[2006-11-30 11:17:17 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vbd/2/2049/hotplug-status.
[2006-11-30 11:17:17 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback 1.
[2006-11-30 11:17:17 xend 4790] DEBUG (__init__:1072) Waiting for 2050.
[2006-11-30 11:17:17 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vbd/2/2050/hotplug-status.
[2006-11-30 11:17:19 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback /local/domain/0/backend/vbd/2/2050/hotplug-status.
[2006-11-30 11:17:19 xend 3144] DEBUG (__init__:1072) hotplugStatusCallback 1.
[2006-11-30 11:17:19 xend 4790] DEBUG (__init__:1072) Waiting for devices irq.
[2006-11-30 11:17:19 xend 4790] DEBUG (__init__:1072) Waiting for devices pci.
[2006-11-30 11:17:19 xend 4790] DEBUG (__init__:1072) Waiting for devices ioports.
[2006-11-30 11:17:19 xend 4790] DEBUG (__init__:1072) Waiting for devices tap.
[2006-11-30 11:17:19 xend 4790] DEBUG (__init__:1072) Waiting for devices vtpm.
[2006-11-30 11:17:19 xend 5985] INFO (__init__:1072) Domain vm01 (2) unpaused.

some output from "ps uax |grep loop" in dom0:

root      5441  0.0  0.0     0    0 ?        S<   Nov30   0:00 [loop0]
root      5975  0.0  0.0     0    0 ?        S<   Nov30   0:00 [loop1]
root     14932  0.0  0.1  1532  484 pts/2    R+   22:42   0:00 grep loop

and some from "cat /proc/partitions" in dom0:

major minor  #blocks  name

   7     0    1024000 loop0
   7     1     512000 loop1
   3     0  156290904 hda
   3     1    5855661 hda1
   3     2     489982 hda2
   3     3   14651280 hda3
   3     4  135291397 hda4
  22     0  156290904 hdc
  22     1  156288321 hdc1

[Merc]

from "less /var/log/kern.log" (so the same as "dmesg") in domU:

Nov 30 11:17:34 vm01 kernel: klogd 1.4.1#17, log source = /proc/kmsg started.
Nov 30 11:17:34 vm01 kernel: Linux version 2.6.16.29-xenU (root@Palan) (gcc vers
ion 4.1.2 20060901 (prerelease) (Debian 4.1.1-13)) #2 SMP Wed Nov 29 23:03:25 CE
T 2006
Nov 30 11:17:34 vm01 kernel: BIOS-provided physical RAM map:
Nov 30 11:17:34 vm01 kernel:  Xen: 0000000000000000 - 0000000008800000 (usable)
Nov 30 11:17:34 vm01 kernel: 0MB HIGHMEM available.
Nov 30 11:17:34 vm01 kernel: 136MB LOWMEM available.
Nov 30 11:17:34 vm01 kernel: On node 0 totalpages: 34816
Nov 30 11:17:34 vm01 kernel:   DMA zone: 34816 pages, LIFO batch:7
Nov 30 11:17:34 vm01 kernel:   DMA32 zone: 0 pages, LIFO batch:0
Nov 30 11:17:34 vm01 kernel:   Normal zone: 0 pages, LIFO batch:0
Nov 30 11:17:34 vm01 kernel:   HighMem zone: 0 pages, LIFO batch:0
Nov 30 11:17:34 vm01 kernel: Built 1 zonelists
Nov 30 11:17:34 vm01 kernel: Kernel command line:  ip=10.80.0.2:1.2.3.4:10.80.0.
254:255.0.0.0:vm01:eth0:off root=/dev/sda1 3
Nov 30 11:17:34 vm01 kernel: Enabling fast FPU save and restore... done.
Nov 30 11:17:34 vm01 kernel: Initializing CPU#0
Nov 30 11:17:34 vm01 kernel: PID hash table entries: 1024 (order: 10, 16384 byte
s)
Nov 30 11:17:34 vm01 kernel: Xen reported: 1194.915 MHz processor.
Nov 30 11:17:34 vm01 kernel: Dentry cache hash table entries: 32768 (order: 5, 1
31072 bytes)
Nov 30 11:17:34 vm01 kernel: Inode-cache hash table entries: 16384 (order: 4, 65
536 bytes)
Nov 30 11:17:34 vm01 kernel: Software IO TLB disabled
Nov 30 11:17:34 vm01 kernel: vmalloc area: c9000000-fb7fe000, maxmem 33ffe000
Nov 30 11:17:34 vm01 kernel: Memory: 126360k/139264k available (1806k kernel cod
e, 4572k reserved, 535k data, 140k init, 0k highmem)
Nov 30 11:17:34 vm01 kernel: Checking if this processor honours the WP bit even 
in supervisor mode... Ok.
Nov 30 11:17:34 vm01 kernel: Calibrating delay using timer specific routine.. 25
00.65 BogoMIPS (lpj=12503292)
Nov 30 11:17:34 vm01 kernel: Mount-cache hash table entries: 512
Nov 30 11:17:34 vm01 kernel: CPU: After generic identify, caps: 0183c1f1 c1c7f9f
f 00000000 00000000 00000000 00000000 00000000
Nov 30 11:17:34 vm01 kernel: CPU: After vendor identify, caps: 0183c1f1 c1c7f9ff
 00000000 00000000 00000000 00000000 00000000
Nov 30 11:17:34 vm01 kernel: CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (
64 bytes/line)
Nov 30 11:17:34 vm01 kernel: CPU: L2 Cache: 256K (64 bytes/line)
Nov 30 11:17:34 vm01 kernel: CPU: After all inits, caps: 0183c1f1 c1c7f9ff 00000
000 00000420 00000000 00000000 00000000
Nov 30 11:17:34 vm01 kernel: Checking 'hlt' instruction... OK.
Nov 30 11:17:34 vm01 kernel: Brought up 1 CPUs
Nov 30 11:17:34 vm01 kernel: migration_cost=0
Nov 30 11:17:34 vm01 kernel: Grant table initialized
Nov 30 11:17:34 vm01 kernel: NET: Registered protocol family 16
Nov 30 11:17:34 vm01 kernel: Brought up 1 CPUs
Nov 30 11:17:34 vm01 kernel: xen_mem: Initialising balloon driver.
Nov 30 11:17:34 vm01 kernel: Initializing Cryptographic API
Nov 30 11:17:34 vm01 kernel: io scheduler noop registered
Nov 30 11:17:34 vm01 kernel: io scheduler anticipatory registered (default)
Nov 30 11:17:34 vm01 kernel: io scheduler deadline registered
Nov 30 11:17:34 vm01 kernel: io scheduler cfq registered
Nov 30 11:17:34 vm01 kernel: i8042.c: No controller found.
Nov 30 11:17:34 vm01 kernel: RAMDISK driver initialized: 16 RAM disks of 4096K s
ize 1024 blocksize
Nov 30 11:17:34 vm01 kernel: Xen virtual console successfully installed as tty1
Nov 30 11:17:34 vm01 kernel: Event-channel device installed.
Nov 30 11:17:34 vm01 kernel: netfront: Initialising virtual ethernet driver.
Nov 30 11:17:34 vm01 kernel: Registering block device major 8
Nov 30 11:17:34 vm01 kernel: netfront: device eth0 has flipping receive path.
Nov 30 11:17:34 vm01 kernel: mice: PS/2 mouse device common for all mice
Nov 30 11:17:34 vm01 kernel: NET: Registered protocol family 2
Nov 30 11:17:34 vm01 kernel: IP route cache hash table entries: 2048 (order: 1, 
8192 bytes)
Nov 30 11:17:34 vm01 kernel: TCP established hash table entries: 8192 (order: 4,
 65536 bytes)
Nov 30 11:17:34 vm01 kernel: TCP bind hash table entries: 8192 (order: 4, 65536 
bytes)
Nov 30 11:17:34 vm01 kernel: TCP: Hash tables configured (established 8192 bind
8192)
Nov 30 11:17:34 vm01 kernel: TCP reno registered
Nov 30 11:17:34 vm01 kernel: TCP bic registered
Nov 30 11:17:34 vm01 kernel: NET: Registered protocol family 1
Nov 30 11:17:34 vm01 kernel: NET: Registered protocol family 17
Nov 30 11:17:34 vm01 kernel: Using IPI No-Shortcut mode
Nov 30 11:17:34 vm01 kernel: IP-Config: Complete:
Nov 30 11:17:34 vm01 kernel:       device=eth0, addr=10.80.0.2, mask=255.0.0.0, 
gw=10.80.0.254,
Nov 30 11:17:34 vm01 kernel:      host=vm01, domain=, nis-domain=(none),
Nov 30 11:17:34 vm01 kernel:      bootserver=1.2.3.4, rootserver=1.2.3.4, rootpa
th=
Nov 30 11:17:34 vm01 kernel: kjournald starting.  Commit interval 5 seconds
Nov 30 11:17:34 vm01 kernel: EXT3 FS on sda1, internal journal
Nov 30 11:17:34 vm01 kernel: EXT3-fs: mounted filesystem with ordered data mode.
Nov 30 11:17:34 vm01 kernel: VFS: Mounted root (ext3 filesystem).
Nov 30 11:17:34 vm01 kernel: Freeing unused kernel memory: 140k freed
Nov 30 11:17:34 vm01 kernel: EXT3 FS on sda1, internal journal

the "cat /proc/partitions" output of the domU:

major minor  #blocks  name

   8     1    1024000 sda1
   8     2     512000 sda2

I can't really explain why the domU doesn't use swap.

If you need a more specific error log please name it and I'll post it the next time


Thanks.
Merc

[falko]

I don't see any errors at all...

[Merc]

Here's a bit from the dom0's dmesg output (some of the last lines):

ohci_hcd 0000:00:02.3: OHCI Host Controller
ohci_hcd 0000:00:02.3: new USB bus registered, assigned bus number 2
ohci_hcd 0000:00:02.3: irq 10, io mem 0xcffff000
8250_pnp: Unknown symbol serial8250_unregister_port
8250_pnp: Unknown symbol serial8250_register_port
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 3 ports detected
Linux agpgart interface v0.101 (c) Dave Jones
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
8250_pnp: Unknown symbol serial8250_unregister_port
8250_pnp: Unknown symbol serial8250_register_port
sis630_smbus 0000:00:02.0: SIS630 comp. bus not detected, module not inserted.
sis96x_smbus 0000:00:02.1: SiS96x SMBus base address: 0x0c00
agpgart: Detected SiS 735 chipset
agpgart: AGP aperture is 4M @ 0xd0000000
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
Adding 489972k swap on /dev/hda2.  Priority:-1 extents:1 across:489972k
EXT3 FS on hda1, internal journal
it87: Found IT8705F chip at 0x290, revision 1
device-mapper: 4.5.0-ioctl (2005-10-04) initialised: dm-devel@redhat.com
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda3, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda4, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hdc1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
ACPI: PCI Interrupt 0000:00:0d.0[A] -> Link [LNKC] -> GSI 12 (level, low) -> IRQ 12
ACPI: PCI Interrupt 0000:00:0f.0[A] -> Link [LNKD] -> GSI 5 (level, low) -> IRQ 5
NET: Registered protocol family 10

As you can see, the line "Adding 489972k swap on /dev/hda2. Priority:-1 extents:1 across:489972k" indicates, that swap is used by the dom0.
And it's also this line that I miss reviewing the kern.log output of the domU.

The really strange thing is this:

Broadcast message from root (tty1) (Mon Dec  4 16:29:41 2006):

The system is going down for system halt NOW!
INIT: Switching to runlevel: 0
INIT: Sending processes the TERM signal
INIT: Sending processes the KILL signal
Stopping X display manager: xdm not running (/var/run/xdm.pid not found).
Stopping periodic command scheduler: cron.
Stopping BitTorrent tracker: bttrack.bittorrent.
Stopping internet superserver: inetd.
Stopping OpenBSD Secure Shell server: sshd.
Stopping X font server: xfs.
Stopping kernel log daemon: klogd.
Stopping system log daemon: syslogd.
Sending all processes the TERM signal...done.
Sending all processes the KILL signal...done.
Saving random seed...done.
Unmounting remote and non-toplevel virtual filesystems...done.
Deconfiguring network interfaces...done.
Cleaning up ifupdown...done.
Deactivating swap...done.
Unmounting local filesystems...done.
System halted.

The line "Deactivating swap...done." pops into my eye.
Why would a system deactivate swap if it doesn't use it ?

[Fred]

Originally Posted by Merc

Hello.


Second:
I ran into some problems with my virtual machines.
They start up ok and run without problems as long as I don't do anything that requires a large amount of memory.

The problem: the VM's don't use swap memory. The config file looks like this:

<snip>

I had this problem with a VM created by xen-create-image, lvm-swap.
There was no line for the swap in the /etc/fstab on domU.
check your /etc/fstab

/Fred