Re: [Xen-users] VM suddenly hangs

[Marco Weber <marco.jamendo@xxxxxxxxx>]

hi,

yes you're right:
host: 2.6.24-24-xen         (ubuntu 8.04 LTS)
vm:   2.6.24-24-xen         (ubuntu 8.04 LTS)

 __  __            _____  ____    _             _                  
 \ \/ /___ _ __   |___ / |___ \  / |   _ __ ___/ |   _ __  _ __ ___
  \  // _ \ '_ \    |_ \   __) | | |__| '__/ __| |__| '_ \| '__/ _ \
  /  \  __/ | | |  ___) | / __/ _| |__| | | (__| |__| |_) | | |  __/
 /_/\_\___|_| |_| |____(_)_____(_)_|  |_|  \___|_|  | .__/|_|  \___|
                              

                      |_|            
(XEN) Xen version 3.2.1-rc1-pre (buildd@buildd) (gcc version 4.2.4 (Ubuntu 4.2.4-1ubuntu4)) Fri Feb 20 06:53:43 UTC 2009
(XEN) Latest ChangeSet: unavailable
(XEN) Command line:
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: V2; EDID transfer time: 2 seconds
(XEN) Disc information:
(XEN)  Found 2 MBR signatures
(XEN)  Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 0000000000098000 (usable)
(XEN)  0000000000098000 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000003fee0000 (usable)
(XEN)  000000003fee0000 - 000000003fee3000 (ACPI NVS)
(XEN)  000000003fee3000 - 000000003fef0000 (ACPI data)
(XEN)  000000003fef0000 - 000000003ff00000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fec00000 - 0000000100000000 (reserved)
(XEN) System RAM: 1022MB (1047008kB)
(XEN) Xen heap: 9MB (10128kB)
(XEN) Domain heap initialised: DMA width 32 bits
(XEN) PAE enabled, limit: 16 GB
(XEN) Processor #0 15:7 APIC version 16
(XEN) IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2021.984 MHz processor.
(XEN) CPU0: AMD Opteron(tm) Processor 146 stepping 01
(XEN) Total of 1 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using old ACK method
(XEN) Platform timer overflows in 234 jiffies.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Brought up 1 CPUs
(XEN) AMD IOMMU: Disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 32-bit, PAE, lsb
(XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0xc0100000 -> 0xc0503000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000003c000000->000000003e000000 (232499 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c0503000
(XEN)  Init. ramdisk: c0503000->c16f3e00
(XEN)  Phys-Mach map: c16f4000->c17df0cc
(XEN)  Start info:    c17e0000->c17e0474
(XEN)  Page tables:   c17e1000->c17f4000
(XEN)  Boot stack:    c17f4000->c17f5000
(XEN)  TOTAL:         c0000000->c1c00000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Dom0 has maximum 1 VCPUs
(XEN) Initrd len 0x11f0e00, start at 0xc0503000
(XEN) Scrubbing Free RAM: done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 96kB init memory.

See you,
     Marco

On 01/26/2011 12:31 PM, Dmitry Nedospasov wrote:

Hey,

On Wed, Jan 26, 2011 at 10:58:28AM +0100, Marco Weber wrote:

This problem just occurs on a small ubuntu 8.04 LTS host.
On this host, there is just 1 VM running.
The problem always occurs, when the VM is up for about 2-3days.
Suddenly, the machine hangs and you cannot connect to it using ssh.
( Just a xm destroy  and  xm create   helps to get the VM running again. )

You forgot to say what kernel you're running on your dom0 and what
kernel you're running on your domU and of course, what xen hypervisor
version are you running?

Regards,

D.

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