[Fedora-xen] two fully virtualized systems crashing

[You, Yongkang]

Em~. Sounds true.

"xm info" can show how large the memory Xen can recognize (total_memory) and how many free memory is left (free_memory) . I think the total_memory of your machine is only 2.5G. It means Xen can only know there is 2.5G memory, except you run a PAE enabled Xen.

Xen0 usually doesn't need too much memory. I suggest you can use 512M or 1024M.

Best Regards,
Yongkang (Kangkang) 永康

>-----Original Message-----
>From: Matthias Bayer [mailto:matbayer.web at web.de]
>Sent: 2006年4月13日 16:03
>To: sct at redhat.com; You, Yongkang
>Cc: fedora-xen at redhat.com
>Subject: RE: [Fedora-xen] two fully virtualized systems crashing
>
>OK - found the problem !
>setting my Dom0 memory with dom0_mem=2G as kernel parameter fixed the
>problem !!
>before i haven't specified anything - so if i understand it right all the memory
>would belong to Dom0 and every DomU that starts 'grabs' a bit until
>Dom0-min-mem is reached.
>so does this behaviour then indicate that something with balooning is
>buggy ??
>
>thanks Stephen and Yongkang for the help so far !
>Matthias
>
>> -----Ursprüngliche Nachricht-----
>> Von: "You, Yongkang" <yongkang.you at intel.com>
>> Gesendet: 13.04.06 09:35:54
>> An:  "Stephen C. Tweedie" <sct at redhat.com>
>> CC: <fedora-xen at redhat.com>
>> Betreff: RE: [Fedora-xen] two fully virtualized systems crashing
>
>
>> Hi Matthias,
>>
>> >Mem:       3501056     684452    2816604          0      69520
>> I am not quite clear about the dom0 memory. Is it 3.5G?
>>
>> How large the memory apply to dom0? I mean how about dom0_mem=.
>>
>> Best Regards,
>> Yongkang (Kangkang) ÓÀ¿µ
>>
>> >-----Original Message-----
>> >From: fedora-xen-bounces at redhat.com
>> >[mailto:fedora-xen-bounces at redhat.com] On Behalf Of Matthias Bayer
>> >Sent: 2006Äê4ÔÂ13ÈÕ 15:30
>> >To: Stephen C. Tweedie
>> >Cc: fedora-xen at redhat.com
>> >Subject: RE: [Fedora-xen] two fully virtualized systems crashing
>> >
>> >
>> >
>> >I have 4 GB of RAM, each DomU has 512 MB and i only  try to run  2
>> >windows DomU's !
>> >
>> >             total       used       free     shared    buffers
>> >cached
>> >Mem:       3501056     684452    2816604          0      69520
>> >347260
>> >-/+ buffers/cache:     267672    3233384
>> >Swap:      2096440          0    2096440
>> >
>> >do i need to configure something elswhere to give the hypervisor more
>> >memory ?
>> >can i create any other debugs that may be helpful to find the problem ?
>> >
>> >regards,
>> >Matthias
>> >
>> >> Hi,
>> >>
>> >> On Wed, 2006-04-12 at 17:29 +0200, Matthias Bayer wrote:
>> >> >
>> >> > (0 of 1)XEN) DOM
>> >> > (XEN) Couldn't alloc shadow page! dom3 count=893o map I/O space
>> >> > 000f03
>> >> > (XEN) Shadow table counts: l1=0 l2=0 hl2=0
>> >>
>> >> This looks like the hypervisor ran out of memory.  How much memory do
>> >> you have, and how much is being given to each domain?
>> >>
>> >> --Stephen
>> >>
>> >>
>> >
>> >
>>
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>
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