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

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

Hi, Adi Kriegisch and Ian Campbell,

    It's really weird.

    Even switch to Xen 4.4 with the others unchanged,  Domain-0 still cannot get the assigned memory at boot.

menuentry 'Debian GNU/Linux, with Xen xen and Linux 3.2.0-4-amd64' --class debian --class gnu-linux --class gnu --class os --class xen {
insmod part_msdos
insmod ext2
set root='(hd1,msdos1)'
search --no-floppy --fs-uuid --set=root 666afbf0-b295-45c3-b45b-421514859465
echo 'Loading Xen xen ...'
multiboot /xen.gz placeholder dom0_mem=6G,max:8G
echo 'Loading Linux 3.2.0-4-amd64 ...'
module /vmlinuz-3.2.0-4-amd64 placeholder root=/dev/mapper/lvmOct_f9-root ro console=tty0 console=ttyS1,9600 quiet
echo 'Loading initial ramdisk ...'
module /initrd.img-3.2.0-4-amd64
}

root@ServerV3:/boot/grub# xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 3979 40 r----- 115.3

    Does that mean dom0_mem option is invalid for NUMA server?

---

Best Regards

 

From: Adi Kriegisch

Date: 2014-09-04 19:41

To: kevin.zhang@xxxxxxxxxxx

CC: Ian Campbell; xen-users

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

Hey

 

>    I am using Xen 4.3.3, the last one that still compatible with xend.

>    I tested xen 4.2 just now, still get 3979M... 

>    Wheezy kernel version is 3.2.54, it seems to be a common issue with linux

>    kernel 3.0+, but how can we leave all the available memory to Domain-0

>    ïit's waste of memory..

could this possibly be related to

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

 

-- Adi

 

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