Re: [ovirt-users] hot plug memory in el7

On 10 Dec 2015, at 11:30, Gianluca Cecchi <gianluca.cecchi(a)gmail.com&gt; wrote: On Thu, Dec 10, 2015 at 10:41 AM, Michal Skrivanek <mskrivan(a)redhat.com&gt; wrote: > On 10 Dec 2015, at 00:11, Gianluca Cecchi <gianluca.cecchi(a)gmail.com&gt; wrote: > > On Wed, Dec 9, 2015 at 10:21 PM, Sandro Bonazzola wrote: > > > No idea. If it's libvirt issue, can you test http://cbs.centos.org/koji/buildinfo?buildID=4726 ? it's from centos virt sig, introduced for Xen but should work on kvm as well. or the 7.2 libvirt from http://mirror.centos.org/centos/7/cr/x86_64/Packages/. > > > > > Then I reboot my HV, exit from maintenance, connect to engine and start VM. > VM situation > $ free > total used free shared buff/cache available > Mem: 8172900 147356 7875692 8480 149852 7847248 > Swap: 839676 0 839676 > > I set memory from 8192Mb to 10240Mb > I get the same window I got with previous libvirt version. > I select OK (I don't select "Apply later" checkbox) > > Inside guest there is no changed memory, but I can see this in /var/log/messages: could it be perhaps the guest has troubles recognizing hotplug? Is it also a CentOS 7.1 guest? Yes, CentOS 7.1 updated up to a couple of days ago.

> > Dec 9 23:56:18 racclient1 kernel: init_memory_mapping: [mem 0x240000000-0x2bfffffff] > > ANd output of dmesg contains: > > [ 219.363640] ACPI: \_SB_.MP00: ACPI_NOTIFY_DEVICE_CHECK event > [ 219.364248] init_memory_mapping: [mem 0x240000000-0x2bfffffff] > [ 219.364253] [mem 0x240000000-0x2bfffffff] page 2M > [ 219.366773] [ffffea0009000000-ffffea00091fffff] PMD -> [ffff8800b7e00000-ffff8800b7ffffff] on node 0 > [ 219.368433] [ffffea0009200000-ffffea00093fffff] PMD -> [ffff880231400000-ffff8802315fffff] on node 0 > [ 219.369838] [ffffea0009400000-ffffea00095fffff] PMD -> [ffff880233600000-ffff8802337fffff] on node 0 > [ 219.371226] [ffffea0009600000-ffffea00097fffff] PMD -> [ffff880233000000-ffff8802331fffff] on node 0 > [ 219.372790] [ffffea0009800000-ffffea00099fffff] PMD -> [ffff880232c00000-ffff880232dfffff] on node 0 > [ 219.374185] [ffffea0009a00000-ffffea0009bfffff] PMD -> [ffff880232200000-ffff8802323fffff] on node 0 > [ 219.377349] [ffffea0009c00000-ffffea0009ffffff] PMD -> [ffff8800b7400000-ffff8800b77fffff] on node 0 > [ 219.378716] [ffffea000a000000-ffffea000a1fffff] PMD -> [ffff8800b7000000-ffff8800b71fffff] on node 0 > [ 219.380115] [ffffea000a200000-ffffea000a3fffff] PMD -> [ffff880230c00000-ffff880230dfffff] on node 0 > [ 219.388147] [ffffea000a400000-ffffea000abfffff] PMD -> [ffff880227c00000-ffff8802283fffff] on node 0 > [ 219.389687] [ffffea000ac00000-ffffea000adfffff] PMD -> [ffff8800b7200000-ffff8800b73fffff] on node 0 but “free” sstill shows the same value as before hotplug? Yes, output of "free" command show the same amount of memory > > I then shutdown the VM and power on it again and I get the changed memory: well, yeah, but that doesn’t count since you’ve shut it down, so the next run is initialized with 10GB It was only to verify that after shutdown/power on the changed setting would have been applied to the VM > $ free > total used free shared buff/cache available > Mem: 10237276 167872 9919656 8480 149748 9891280 > Swap: 839676 0 839676 > > BTW: When I press ok in the gui for memory increase I get these events in webadmin: > Dec 9, 2015 11:56:22 PM > VM racclient1 c71_Disk1_newtemplate disk was updated by admin@internal. hm..doesn’t sound right. Did the confirmation window show any more fields as changed other than memory? The window I got when I increased the amount of memory was the same as in a previous test where I selected "Cancel", before libvirt update; see https://drive.google.com/file/d/0BwoPbcrMv8mvbUw2VnpCMTNNQlU/view?usp=sha... And I also commented about misleading information inside it: I didn't clearly understand what would have been changed and what not, because I see memory information in both parts…..

> > It doesn't seem as expected, does it? I think we’re almost there. Just need to figure out what happened in the guest. I would suspect a problem there Thanks, michal > Gianluca > The gui events have the same timestamp of the moment when I pressed ok. After 2-3 minutes I did shutdown and power on of the VM and I only got the down/up events... I'm available to make further test you need. GIanluca