------- Comment From [email protected] 2016-08-13 15:03 EDT------- (In reply to comment #10) > (In reply to comment #9) > > You say that this is because of a ddw bugfix in the qemu in PowerKVM. Which > > version of qemu, or which version of PowerKVM, includes this change?
qemu-2.5-6.el7_1.pkvm3_1_1.2200.0 contains the fix for DDW issue of QEMU. > > is this reproducible with the qemu in some version of Ubuntu, and if so, which version(s)? I have tried Ubuntu14.04.5 as a guest, here I can see the problem with the qemu mentioned above i.e. 2.5-6 of PowerKVM host. > > > > What are the steps to reproduce the failure? 1. Prepare the guest for memory hot plug, by adding the following tags to the guest's xml. Here I have a guest with NUMA support <maxMemory slots='32' unit='KiB'>134217728</maxMemory> <memory unit='KiB'>73400320</memory> <currentMemory unit='KiB'>73400320</currentMemory> <vcpu placement='static' current='24'>32</vcpu> <cpu> <topology sockets='32' cores='1' threads='1'/> <numa> <cell id='0' cpus='0,4,8,12,16,20,24,28' memory='2097152' unit='KiB'/> <cell id='1' cpus='1,5,9,13,17,21,25,29' memory='2097152' unit='KiB'/> <cell id='2' cpus='2,6,10,14,18,22,26,30' memory='2097152' unit='KiB'/> <cell id='3' cpus='3,7,11,15,19,23,27,31' memory='2097152' unit='KiB'/> </numa> </cpu> 2. define the guest, start the guest, log in and check the current memory. virsh define <filename.xml> virsh start <domain name> --console log in cat /proc/meminfo | grep -i memtotal 3. From Host, hot plug the memory using the following command virsh attach-device <domain name> men_hp.xml --live mem_hp.xml for hot plugging 8G is given below, change the value according to your environment. <memory model='dimm'> <target> <size unit='KiB'>8388608</size> <node>0</node> </target> </memory> 4. In the guest Memory value should have increased by 8GB, but there will be no change. 5. From Guest OS /var/log/drmgr [root@localhost ~]# cat /var/log/drmgr ... drmgr: -c mem -a -q 1 Validating Memory DLPAR capability...yes. Maximum of 496 LMBs Could not find LMB with drc-index of 0 Found 0 LMBs currently allocated Could not gather LMB (logical memory block information. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612424 Title: Ubuntu14.04.05 To get memory hotplug working in PowerKVM, powerpc- utils needs update to version 1.3.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/powerpc-utils/+bug/1612424/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
