[kernel-xen] Server with 16GB of RAM only sees 800MB after kernel-xen-3.11.1-1.el6xen.x86_64 install

Gordan Bobic gordan at bobich.net
Wed Sep 18 05:12:29 EST 2013

On 09/17/2013 06:20 PM, Steven Spencer wrote:
> On 09/17/2013 11:50 AM, Steven Spencer wrote:
>> All,
>> Anyone else run into this one? Just installing a new server and the
>> server standard kernel sees all 16GB of memory, however after installing
>> kernel-xen-3.11.1-1 and doing a cat /proc/meminfo we are only seeing
>> MemTotal: 786920 kB
>> Any ideas? Is there a parameter that can be used on the kernel /xen.gz
>> line of the grub.conf that will force the kernel to see all the memory?
>> The server is CentOS 6.4 x86_64.
>> Thanks in advance,
> Here's another oddity: xm dmesg posts the correct RAM amount:
> (XEN) System RAM: 16356MB (16748692kB)

Can you paste your grub.conf? It sounds suspiciously like you have a 
parameter there that limits dom0 RAM.


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