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Re: [Xen-users] dynamic memory extension not working on Debian Squeeze

On 11/14/2012 11:12 AM, Ian Campbell wrote:
On Wed, 2012-11-14 at 00:19 +0000, Peter Viskup wrote:
Hi all,
my setup:
dom0 and domU - Debian Squeeze (updated)
dom0 kernel: linux-image-2.6.32-5-xen-amd64 (Debian revision 2.6.32-45)
Xen hypervisor: 4.0.1 (Debian revision 4.0.1-5.4)
with domU running kernels 2.6.32-5-xen-amd64 and 2.6.32-5-amd64 the
memory extension via mem-set is not working
with domU running older kernel 2.6.26-2-xen-amd64 (Debian revision
2.6.26-27) the memory extension via mem-set is working fine

These 2.6.32 kernels should be pvops kernels. Is there any special
procedure for the memory extension on pvops kernels?

Can somebody tell me what am I doing wrong and how I could get this
online memory increasing working?
can you supply your guest configuration please, as well as the specific
values you are trying to mem-set (and the output of those commands).

Also the output of
   # xm list
   # xenstore-ls -fp | grep target
after creation and after attempting to mem-set would be handy. Also the
content of /sys/devices/system/xen_memory/xen_memory0/target_kb ,
MemTotal from /proc/meminfo.


Hi Ian,
here are the outputs and additiona info:

server1:~# xm list ldap
Name ID Mem VCPUs State Time(s) ldap 2 256 1 -b---- 449.3
server1:~# xm mem-set ldap 512
server1:~# xm list ldap
Name ID Mem VCPUs State Time(s) ldap 2 512 1 -b---- 449.4

ldap:~# grep MemTotal /proc/meminfo
MemTotal:         250320 kB
ldap:~# cat /sys/devices/system/xen_memory/xen_memory0/target_kb
ldap:~# uname -a
Linux ldap 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux

server1:~# xenstore-ls -fp | grep target
<this command is hanging>
xend.log entry from today:
[2012-11-14 11:27:24 2879] DEBUG (XendDomainInfo:1477) Setting memory target of domain ldap (2) to 512 MiB.
messages errors:
Nov 14 11:29:06 localhost kernel: : [37380.393789] XENBUS error -22 while reading message

xenfs is not mounted on dom0 - could it be the reason of this issues?

Any thoughts?


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