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Summary:
[TestOnly] Allow enable/disable ksm per VM
Product:
Red Hat Enterprise Linux 7
Reporter:
Paolo Bonzini <pbonzini>
Component:
libvirt Assignee:
Libvirt Maintainers <libvirt-maint>
Status:
CLOSED
CURRENTRELEASE
QA Contact:
Virtualization Bugs <virt-bugs>
Severity:
medium
Docs Contact:
Priority:
low
Version:
7.0 CC:
acathrow, berrange, bsarathy, dallan, dyuan, eblake, gcosta, gsun, honzhang, iheim, jdenemar, mjenner, mzhan, xen-maint, yoyzhang
Target Milestone:
rc Keywords:
TestOnly
Target Release:
---
Hardware:
All
OS:
Linux
Whiteboard:
Fixed In Version:
Doc Type:
Bug Fix
Doc Text:
Story Points:
---
Clone Of:
LibvirtKSMOff
Environment:
Last Closed:
2014-06-13 10:52:15 UTC
Type:
---
Regression:
---
Mount Type:
---
Documentation:
---
CRM:
Verified Versions:
Category:
---
oVirt Team:
---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:
---
Target Upstream Version:
Embargoed:
Bug Depends On:
635418 , 635419 , 769021 , 950968
Bug Blocks:
635417 , 644849 , 655920
pkgs: libvirt-1.1.1-12.el7.x86_64 qemu-kvm-rhev-1.5.3-10.el7.x86_64 kernel-3.10.0-9.el7.x86_64 steps: 1. Add the following xml info into guest ... <memoryBacking> <nosharepages/> </memoryBacking> ... 2. Start the guest # virsh start r7q Domain r7q started # ps aux|grep r7q qemu 17219 95.8 0.0 1477604 61088 ? Sl 19:04 0:05 /usr/libexec/qemu-kvm -name r7q -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off,mem-merge=off -m 977 -realtime mlock=off -smp 2,maxcpus=4,sockets=4,cores=1,threads=1 -uuid f8de2e07-3fdc-5425-6c72-30d400fb0679 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/r7q.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/libvirt/images/r7q-mjc.img,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=23,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:37:28:f5,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -vga cirrus -device AC97,id=sound0,bus=pci.0,addr=0x4 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 the mem-merge=off is added to qemu command line. remove the adding xml and restart, no mem-merge added to command line which is default to mem-merge=on After enable ksm on host: 1.echo 1 > /sys/kernel/mm/ksm/run 2.echo 50 > /sys/kernel/mm/ksm/sleep_millisecs 3.echo 5000 > /sys/kernel/mm/ksm/pages_to_scan check with steps with comments #7 in bug 769021, also works as expected.