[Xen-users] maxmem does not work?

To:	xen-users@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-users] maxmem does not work?
From:	George Shuklin <george.shuklin@xxxxxxxxx>
Date:	Sun, 01 Aug 2010 05:05:18 +0400
Delivery-date:	Sat, 31 Jul 2010 18:06:54 -0700
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Good day.

I'm trying to play with pre-ballooned VM:

kernel="/boot/vmlinuz-2.6.32-5-xen-amd64"
ramdisk="/boot/initrd.img-2.6.32-5-xen-amd64"
builder='linux'
memory = 1024
maxmem = 2048
name = "vm1"
vif = [ '' ]
disk = [ 'phy:vm/vm1,xvda1,w' ]
root = "/dev/xvda1 ro"
extra="xencons=xcv console=hvc0 console=tty1"

After creating VM (xm create vm1) I'm trying to change memory: 
xm mem-set vm1 1500

But this does not raise memory in guest.

I see changes in xm list -l:
...
    (maxmem 2048)xem
    (memory 1500)
...

But I don't see any changes in guest and (even) in xentop:
                                 MEMORY            MAXMEM
 vm1 --b---          4    0.6    1044736    4.2    2097152 

But when I change values lower (to 700Mb f.e.) - it going down in guest.

I'm using xen from debian sid and image 2.6.32-5-xen-amd64

What I'm doing wrong? 


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[Xen-users] maxmem does not work?