Re: [Xen-users] dom0_mem not working in debian wheezy

["kevin.zhang@xxxxxxxxxxx" <kevin.zhang@xxxxxxxxxxx>]

Ian Campbellï

    Thank you for your reply.

    I've read the page you provided, but my situation is different.

    Even I set dom0_mem=6G,max:8G, the displayed  domain-0 memory is still 3979. It seems that it can provide no more than 4G

I don't know why the same option differ from 1 socket and 2 socket servers.

This time dom0_mem=6G,max:8G

root@ServerV3:~# xm list 0
Name ID Mem VCPUs State Time(s)
Domain-0 0 3979 40 r----- 1549.2

root@ServerV3:~# cat /proc/meminfo 

MemTotal:        3737508 kB
MemFree:         2603036 kB

root@erverV3:~# free -m
total used free shared buffers cached
Mem: 3649 1120 2529 0 41 260

    By the way, my 2 sockets server is using E5 2650v3, DDR4 64G, it's from Intel Lab, while my 1 socket server is I5 CPU DDR3 16G.

---

Best Regards

 

From: Ian Campbell

Date: 2014-09-04 17:34

To: kevin.zhang@xxxxxxxxxxx

CC: xen-users

Subject: Re: [Xen-users] dom0_mem not working in debian wheezy

On Thu, 2014-09-04 at 11:32 +0800, kevin.zhang@xxxxxxxxxxx wrote:

>

> Hi all,

>

>

>       Today I found that dom0_mem option does not work in my 64G 2 cpu

> server , but works in my 16G 1 CPU server.

> I am using debian wheezy and xen 4.3.3.

>       Firstly I set GRUB_CMDLINE_XEN="dom0_mem=6G,max:6G"

> in /etc/default/grub, 

>  Then execute: 

>     update-grub

>  After rebooting,  execute:

>       xm list 0

>   Only see no more than 3967M reserved for Domain-0 in my 64G 2CPU

> server, however, my 16G 1CPU server display correctly.

>   If I use xm mem-set 0 5000, dom0 memory also can be raised.

>   But why it does not work with dom0_mem option?

 

Does

http://blog.xen.org/index.php/2012/04/30/memory-where-it-has-not-gone/

relate to your situation?

 

Ian.

 

 

 

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