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

Steven Spencer steven.spencer at kdsi.com
Wed Sep 18 03:27:18 EST 2013

On 09/17/2013 12:20 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)
Ok, just checked the Dom0 with 2048M of RAM and now it is reporting 1.8 
GB of total memory, so this appears to be memory ballooning issue. 
Should ballooning be on or off for normal operation?

Steven G. Spencer, Network Administrator
KSC Corporate - The Kelly Supply Family of Companies
Office 308-382-8764 Ext. 231

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