Re: [Xen-users] Max memory

[jacek burghardt <jaceksburghardt@xxxxxxxxx>]

I have couple of amd based systems. I have opteron 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                                                                                        y): 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                                                                                        n: -3

libxl: error: libxl_dm.c:1312:libxl__destroy_device_model: could not find device                                                                                        -model's pid for dom 4

libxl: error: libxl.c:1422:libxl__destroy_domid: libxl__destroy_device_model fai                                                                                        led for 4

[root@xen2hebe xen]# nano /var/log/xen/*

[root@xen2hebe xen]# rm  /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                                                                                        , performance might be affected

xc: info: VIRTUAL MEMORY ARRANGEMENT:

  Loader:        0000000000100000->000000000019eb64

  Modules:       0000000000000000->0000000000000000

  TOTAL:         0000000000000000->00000002fe000000

  ENTRY ADDRESS: 0000000000100000

xc: error: Could not allocate memory for HVM guest. (16 = Device or resource bus                                                                                        y): 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                                                                                        n: -3

libxl: error: libxl_dm.c:1312:libxl__destroy_device_model: could not find device                                                                                        -model's pid for dom 5

libxl: error: libxl.c:1422:libxl__destroy_domid: libxl__destroy_device_model fai   

On Wed, Jul 31, 2013 at 6:14 AM, Gordan Bobic <gordan@xxxxxxxxxx> 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 <jaceksburghardt@xxxxxxxxx> wrote:

So is no one using xen or no body has any issues with memory limits ?
 It 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-git 

On Tue, Jul 30, 2013 at 6:59 AM, jacek burghardt  wrote:

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@gmail.com

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