Re: [Xen-users] Max memory

[Gordan Bobic <gordan@xxxxxxxxxx>]

From what you pasted below, it looks like something to do with
NUMA is failing. Have you checked that Xen 4.2.x behaves the
same way?

On Wed, 31 Jul 2013 06:22:58 -0600, jacek burghardt 
<jaceksburghardt@xxxxxxxxx> wrote:
> I have couple of amd based systems. I haveÂopteron 2373 e with 32 gb
> of ram and it will not let me assign 12 gb of ram. The most I could
> assign is 6GB
> xc: error: Could not allocate memory for HVM guest. (16 = Device or
> resource bus                   Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Ây): Internal error
> libxl: error: libxl_dom.c:620:libxl__build_hvm: hvm building failed
> libxl: error: libxl_create.c:900:domcreate_rebuild_done: cannot
> (re-)build domai                  Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â Ân: -3
> libxl: error: libxl_dm.c:1312:libxl__destroy_device_model: could not
> find device                   Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â-model's pid for dom 4
> libxl: error: libxl.c:1422:libxl__destroy_domid:
> libxl__destroy_device_model fai             Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â Â Â Â Â Â Âled for 4
> [root@xen2hebe xen]# nano /var/log/xen/*
> [root@xen2hebe xen]# rm Â/var/log/xen/*
> [root@xen2hebe xen]# xl create archlinuxa.cfg
> Parsing config from archlinuxa.cfg
> got a tsc mode string: "default"
> libxl: notice: libxl_numa.c:491:libxl__get_numa_candidate: NUMA
> placement failed                  Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â Â, performance might be affected
> xc: info: VIRTUAL MEMORY ARRANGEMENT:
> Â Loader: Â Â Â Â0000000000100000->000000000019eb64
> Â Modules: Â Â Â 0000000000000000->0000000000000000
> Â TOTAL: Â Â Â Â 0000000000000000->00000002fe000000
> Â ENTRY ADDRESS: 0000000000100000
> xc: error: Could not allocate memory for HVM guest. (16 = Device or
> resource bus                   Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Ây): Internal error
> libxl: error: libxl_dom.c:620:libxl__build_hvm: hvm building failed
> libxl: error: libxl_create.c:900:domcreate_rebuild_done: cannot
> (re-)build domai                  Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â Ân: -3
> libxl: error: libxl_dm.c:1312:libxl__destroy_device_model: could not
> find device                   Â
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Â Â-model's pid for dom 5
> libxl: error: libxl.c:1422:libxl__destroy_domid:
> libxl__destroy_device_model fai ÂÂ
>
> On Wed, Jul 31, 2013 at 6:14 AM, Gordan Bobic  wrote:
>  What exactly is the error you are seeing? I have a hardware bug
>  that prevents me from using more RAM than the lowest BAR with
>  PCI passthrough (which in my case happens to be 2688MB), but
>  without PCI passthrough I can easily set the VM for 8GB or
>  16GB and it just works.
>
>  Are you using PCI passthrough? What are your dom0 and domU
>  E820 maps?
>
>  On Wed, 31 Jul 2013 05:56:12 -0600, jacek burghardt  wrote:
>
>  So is no one using xen or no body has any issues with memory limits 
> ?
>  ÂIt xen limited to only 6 gb of ram per vm ? I am unable to assign
>  anything above 6 gb KVM does not have any problem but xen will not
> let
>  me assign more than 6 gb to vm machine. I use xen-4.3-gitÂ
>
>  On Tue, Jul 30, 2013 at 6:59 AM, jacek burghardt Âwrote:
>
>  I wonder what is the maximum memory allocated with Xen 4.3 for
> windows
>  . Is everyone just allocating 4 - 6 GB or more. I had been testing
>  with opetron e2320 and the system has 32 GB of ram so I had failed 
> at
>  assigning more than 6gb. I use windows 2012 upstream qemu. Server
> 2012
>  will not boot with anything more than 6gb.I wonder if any of guy had
>  managed to assign more than 6gb.
>
>  Links:
>  ------
>  [1] mailto:jaceksburghardt@xxxxxxxxx [3]
>
>
>
> Links:
> ------
> [1] mailto:gordan@xxxxxxxxxx
> [2] mailto:jaceksburghardt@xxxxxxxxx
> [3] mailto:jaceksburghardt@xxxxxxxxx

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