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[Xen-users] xm balloon problems

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] xm balloon problems
From: Subhabrata Bhattacharya <xions.microcosm@xxxxxxxxxxxxxx>
Date: Fri, 18 Nov 2005 12:26:40 +0530
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Hi,

I am able to shrink the memory footprint of the domain 0 as well as
any other domain by the help of command xm balloon. But expanding
doesn't work properly for me.

Prior to ballooning

[root@tux06 ~]# xm list
Name              Id  Mem(MB)  CPU  State  Time(s)  Console
Domain-0           0      123    0  r----    999.7
vtux02             8       63    1  -b---     11.8    9608

After shrinking

[root@tux06 ~]# xm balloon 0 64
[root@tux06 ~]# xm balloon 8 32
[root@tux06 ~]# xm list
Name              Id  Mem(MB)  CPU  State  Time(s)  Console
Domain-0           0       64    0  r----   1000.7
vtux02             8       31    1  -b---     11.9    9608

But expanding only works to a fixed extent

[root@tux06 ~]# xm balloon 0 128
[root@tux06 ~]# xm balloon 8 64
[root@tux06 ~]# xm balloon 8 128
[root@tux06 ~]# xm balloon 0 256
[root@tux06 ~]# xm list
Name              Id  Mem(MB)  CPU  State  Time(s)  Console
Domain-0           0      123    0  r----   1001.4
vtux02             8       63    1  -b---     12.0    9608

I have done
[root@tux06 ~]# xm maxmem 0 256
[root@tux06 ~]# xm maxmem 8 256
But it still doesn't work.

My machine has 1GB of physical memory and I am using Xen -2.0.7.

Please suggest.

~$ubh

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