User:Dale/Test Day:2009-05-07 Virtualization:XenDomU

Notes from virtualization test day Test_Day:2009-05-07_Virtualization specifically for Test_Day:2009-05-07_Virtualization:XenDomU. = Xen DomU =

Install
Worked for
 * dom0 2.6.21.7-5.fc8xen #1 SMP Thu Aug 7 12:44:22 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux
 * AMD Opteron(tm) Processor 848
 * flags: fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow up


 * domU 32b works
 * domU 64b works

32 bit guest
Original guest was 1G. Test was: virsh shutdown f11 virsh dumpxml f11 > f11.xml 1048576 524288 virsh define f11.xml virsh start f11 See: QA_talk:Testcase_Virtualization_XenDomU_Memory_Ballooning
 * Add currentMemory parameter which defines minimum memory given to guest at boot.
 * Enact this guest config in Xen via libvirt.

Balloon Up - fail?
[root@felix tmp]# grep -i memory f11-32.xml 1048576  524288

[root@felix xen]# virsh setmem f11-32 $(( 1024 * 1000 ))
 * 1) guest is running...

[root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:24:23 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 1000 MiB.

[root@felix xen]# virsh dominfo f11-32 | grep memory Max memory:    1048576 kB Used memory:    524288 kB

After few minutes guest  still reports 519.

Balloon Down - PASS
[root@felix tmp]# virsh setmem f11-32 $(( 1024 * 256 ))

[root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:36:08 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 256 MiB.

[root@felix tmp]# virsh dominfo f11-32|grep memory Max memory:    1048576 kB Used memory:    262144 kB Guest   reports 256.

Balloon Back Up - PASS
Apparently I'm mistaken in my understanding of  and   tags. I was not able to balloon above 519.

[root@felix tmp]# virsh setmem f11-32 $(( 1024 * 1000 ))

[root@felix tmp]# grep 'memory target' /var/log/xen/xend.log |tail -1 [2009-05-06 23:40:04 28390] DEBUG (XendDomainInfo:664) Setting memory target of domain f11-32 (7) to 1000 MiB. [root@felix tmp]# virsh dominfo f11-32|grep memory Max memory:    1048576 kB Used memory:    524288 kB

Guest  reports 519 again.