** Description changed:
- [Environment]
-
- Description: Ubuntu 16.04.2 LTS
- Release: 16.04
- Codename: xenial
-
- root@buneary:/home/ubuntu# dpkg -l | grep kvm
- ii qemu-kvm 1:2.5+dfsg-5ubuntu10.14
amd64 QEMU Full virtualization
-
[Description]
- - Configured a machine with 32 static VCPUs, 160GB of RAM using 1G
+ - Configured a machine with 32 static VCPUs, 160GB of RAM using 1G
hugepages on a NUMA capable machine.
Domain definition (http://pastebin.ubuntu.com/25121106/)
- Once started (virsh start).
Libvirt log.
LC_ALL=C
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name reproducer2 -S -machine pc-
i440fx-2.5,accel=kvm,usb=off -cpu host -m 124928 -realtime mlock=off
-smp 32,sockets=16,cores=1,threads=2 -object memory-backend-file,id=ram-
node0,prealloc=yes,mem-
path=/dev/hugepages/libvirt/qemu,share=yes,size=64424509440,host-
nodes=0,policy=bind -numa node,nodeid=0,cpus=0-15,memdev=ram-node0
-object memory-backend-file,id=ram-node1,prealloc=yes,mem-
path=/dev/hugepages/libvirt/qemu,share=yes,size=66571993088,host-
nodes=1,policy=bind -numa node,nodeid=1,cpus=16-31,memdev=ram-node1
-uuid d7a4af7f-7549-4b44-8ceb-4a6c951388d4 -no-user-config -nodefaults
-chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-
reproducer2/monitor.sock,server,nowait -mon
chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
-boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
-drive
file=/var/lib/uvtool/libvirt/images/test.qcow,format=qcow2,if=none,id
=drive-virtio-disk0,cache=none -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=1 -chardev pty,id=charserial0 -device isa-
serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -device cirrus-
vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-
pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on
Then the following error is raised.
virsh start reproducer2
error: Failed to start domain reproducer2
error: monitor socket did not show up: No such file or directory
+ [Impact]
- [Possible Fix]
+ * Cannot start virtual machines with large pools of memory allocated
+ on NUMA nodes.
+
+ [Test Case]
+
+ * Configure a Machine with at least 2 NUMA nodes.
+
+ root@buneary:/home/ubuntu# virsh freepages 0 1G
+ 1048576KiB: 60
+
+ root@buneary:/home/ubuntu# virsh freepages 1 1G
+ 1048576KiB: 62
+
+ * Create a guest that uses the full amount of available huge pages (on
+ this case 122). (full guest definition:
+ http://paste.ubuntu.com/25125500/)
+
+ <memory unit='GiB'>120</memory>
+ <currentMemory unit='GiB'>120</currentMemory>
+
+ <memoryBacking>
+ <hugepages>
+ <page size='1' unit='GiB' nodeset='0'/>
+ <page size='1' unit='GiB' nodeset='1'/>
+ </hugepages>
+
+ </memoryBacking>
+
+ <cpu mode='host-passthrough'>
+
+ <topology sockets='16' cores='1' threads='2'/>
+ <numa>
+ <cell id='0' cpus='0-15' memory='60' unit='GiB' memAccess='shared'/>
+ <cell id='1' cpus='16-31' memory='62' unit='GiB' memAccess='shared'/>
+ </numa>
+ </cpu>
+
+ * Define the guest, and try to start it.
+
+ $ virsh define reproducer.xml
+ $ virsh start reproducer
+
+ * Verify that the following error is raised:
+
+ root@buneary:/home/ubuntu# virsh start reproducer2
+ error: Failed to start domain reproducer2
+ error: monitor socket did not show up: No such file or directory
+
+ [Expected Behavior]
+
+ * Machine is started without issues as displayed
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1705132/comments/7
+
+
+ [Regression Potential]
+
+ * None identified.
+
+ [Other Info]
https://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=85af0b803cd19a03f71bd01ab4e045552410368f;hp=67dcb797ed7f1fbb048aa47006576f424923933b
** Tags added: sts-sru-needed
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https://bugs.launchpad.net/bugs/1705132
Title:
Large memory guests, "error: monitor socket did not show up: No such
file or directory"
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