Re: [Xen-users] Xen not seeing all the memory in the box

[Jan Hejl <jh@xxxxxxxxxx>]

Try to add dom0_mem=16G,max:16G to your xen kernel line in GRUB config.

Dne 13.4.2013 00:26, Rich Wales napsal(a):
> I'm running Xen 4.1 (4.1.3-3ubuntu1.3) on an Ubuntu 12.10 server with
> an AMD FX-8150 processor (8 cores) and 16 GB of RAM.
>
> When I boot the server, Xen sees only 3 GB of RAM (instead of 16 GB).
> If I try to create a domU with more than about 1.5 GB of RAM, the create
> fails with messages saying it "could not allocate memory for HVM guest".
>
> Here's the output when I do "xl info" with no domU's running.  Note the
> "total_memory" line.
>
> host                   : panda
> release                : 3.5.0-27-generic
> version                : #46-Ubuntu SMP Mon Mar 25 19:58:17 UTC 2013
> machine                : x86_64
> nr_cpus                : 8
> nr_nodes               : 1
> cores_per_socket       : 4
> threads_per_core       : 2
> cpu_mhz                : 3612
> hw_caps                :
> 178bf3ff:2fd3fbff:00000000:00001710:12982203:00000000:01c9bfff:00000000
> virt_caps              : hvm
> total_memory           : 3010
> free_memory            : 1949
> free_cpus              : 0
> xen_major              : 4
> xen_minor              : 1
> xen_extra              : .3
> 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
> xen_commandline        : placeholder dom0_mem=1G,max:1G dom0_max_vcpus=2
> cc_compiler            : gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
> cc_compile_by          : stefan.bader
> cc_compile_domain      : canonical.com
> cc_compile_date        : Mon Feb  4 16:43:33 UTC 2013
> xend_config_format     : 4
>
> If I boot a regular Ubuntu kernel, it sees all 16 GB of RAM.  And I ran a
> memory test overnight, and the memory is all good.
>
> Any suggestions for how to make Xen able to use all the RAM on the machine?
>
> Rich Wales
> richw@xxxxxxxxx
>
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