[Xen-users] kernel size

[Fred <fred+xen@xxxxxxxxx>]

Hi *,

I have a memory problem that I can't seem to get my hands on properly

When I boot the box plain gentoo (2.6.18) this is the output from
dmesg|grep -n kernel:

58:Memory: 3850464k/3890364k available (4985k kernel code, 38732k
reserved, 1699k data, 276k init, 2972860k highmem)
468:Freeing unused kernel memory: 276k freed

When i boot a xen kernel (2.6.16.28), also Gentoo, I get this output:

51:Memory: 59269k/139264k available (2800k kernel code, 71664k
reserved, 806k data, 160k init, 0k highmem)

/boot/grub/grub.conf:

title=Linux 2.6.16 / Xen 3.0.2
root (hd0,0)
kernel /xen.gz dom0_mem=128M
module /vmlinuz-2.6.16-xen0 root=/dev/md3 noreboot



This boots fine but i run into a 'out of memory' when i perform:
tar cf - .|(cd /mnt2;tar xf-)


What strikes me most is the difference in the dmesg output for reserved
kernel space: 1699k running plain gentoo vs. 71664k running xen domain0

When nothing is running there is about 3.5Mb of memory free according to
`top'

Is xen taking up all this memory? 

What did i do wrong?

Thanks in advance

-- 
Fred

Hear All; Trust Nothing
        -- 190th rule of Aquisition


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