Re: [Xen-users] Xenned box becomes unresponsive

[Florian Gleixner <flo@xxxxxxxxx>]

Same for me on opensuse 11.2. Had to rollback to opensuse 11.1 (kernel
2.6.27.37). I guess it is when IO load is generated from domU and the
domU lives in a "raw device" such as a prtition or a lvm volume. I could
not crash the machine, if domU lives in a file. An alternative is to add
"mem=4G" as parameter for the xen hypervisor in grub:
kernel /xen.gz mem=4G

See Bug:

https://bugzilla.novell.com/show_bug.cgi?id=551695


Svoop wrote:
> Hi
> 
> I'm running a i7-920 with 4G RAM and two SATA HDs in a softraid. Dom0
> (Gentoo 2.6.32 with Xen patches from Suse) is pinned to 1 CPU and only one
> DomU (Gentoo 2.6.31) is active. DomU's root partition is a 180GB ext4 file,
> furthermore it has it's own physical 50GB partition for the swapfile, logs,
> database etc. Xen is at 3.4.2 with routed networking.
> 
> Both Dom0 and DomU boot just fine, but after some hours without much load,
> the machine becomes unresponsive and has to be resetted. (With unresponsive
> I mean that you can't connect via SSH neither Dom0 nor DomU. I don't have
> physical access to the hardware.) The logs however don't show anything odd
> at all.
> 
> One thing I've noted: vmstat shows roughly 2000 context switches when the
> machine is under no load at all.
> 
> I'm still pretty noob not (yet :-) experienced with debugging Xen issues,
> therefore I was hoping someone with more insight could give me a few hints
> as to in which direction I should research.
> 
> Many thanks!
> 
> 
> 
> host                   : boss
> release                : 2.6.31-xen-r7
> version                : #5 SMP Thu Dec 10 14:21:35 CET 2009
> machine                : x86_64
> nr_cpus                : 4
> nr_nodes               : 1
> cores_per_socket       : 4
> threads_per_core       : 1
> cpu_mhz                : 2673
> hw_caps                :
> bfebfbff:28100800:00000000:00000340:0098e3bd:00000000:00000001:00000000
> virt_caps              : hvm
> total_memory           : 8183
> free_memory            : 5069
> node_to_cpu            : node0:0-3
> node_to_memory         : node0:5069
> xen_major              : 3
> xen_minor              : 4
> xen_extra              : .2
> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
> hvm-3.0-x86_32p hvm-3.0-x86_64 
> xen_scheduler          : credit
> xen_pagesize           : 4096
> platform_params        : virt_start=0xffff800000000000
> xen_changeset          : unavailable
> cc_compiler            : gcc version 4.3.4 (Gentoo 4.3.4 p1.0, pie-10.1.5) 
> cc_compile_by          : root
> cc_compile_date        : Thu Dec 10 13:11:35 CET 2009
> xend_config_format     : 4 
> 
>

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