similar to: Live Migration and KSM merging

Hi, This is a very very strange thing I have seen in Linux Kernel. I wrote a simple program, all it does is to load a file into memory. This programming is running on a virtual machine while linux-kvm is working as the hypervisor. I enabled ksm in the hypervisor level, my host machine was installed with a Opensuse11.4 while the guest OS is Fedora14, the strange thing is, whenever I run following

Hi, This is a very very strange thing I have seen in Linux Kernel. I wrote a simple program, all it does is to load a file into memory. This programming is running on a virtual machine while linux-kvm is working as the hypervisor. I enabled ksm in the hypervisor level, my host machine was installed with a Opensuse11.4 while the guest OS is Fedora14, the strange thing is, whenever I run following

Hi guys, Any chance we could get KSM support in centos 5.4? Maybe the centosplus ones or a gift from elrepo.

I am using QEMU/KVM, using Live Migrations like this: virsh migrate --live ${name} qemu+ssh://${DESTINATION}/system My question, running this command makes it hang in the foreground. Is there a way for this to return immediately, so I can just poll for the migration status? Also, is there a way to _cancel_ a migration? I see the --timeout option, however if a given timeout is reached I would

Hello. The Changelog of qemu-2.0.0 mentioned "Live snapshot merging". Someone has an idea what could be ment by this? I'm asking because i'm still struggling with finding a reliable backup solution for running kvm machines. Blockcopy is my current solution. best regards Thomas

Greetings Xen Users, I am trying to bring up xen-4.0.1-0.1.rc4.fc13 on an up to date FC 13 Dell Precision 690. For dom0, I am using the 2.6.32.17 PVOPS kernel. Xen boots and the kernel boots until it reaches a point where KSM fails (as it should, since KSM is compiled out) but hangs, because it cannot find /sys/kernel/mm/ksm/sleep_millisecs and friends. I have booted the kernel on bare metal (KSM

Are their any good guides out there on how to use ksmctl to enable and tune KSM performance on Centos/RedHat At the moment the only guidelines I can find are from the following OLS paper, plus the Linux Kernel Docs. * http://www.kernel.org/doc/ols/2009/ols2009-pages-19-28.pdf * http://www.kernel.org/doc/Documentation/vm/ksm.txt On a basic dual core testbed with 4GB Ram and 4-5 VMs I've

I have had ksm[2] causing a high load (on recent centos7), such things have been reported before[1]. I suspect that this could be related to windows vm's. I am having not that many vm's in the current setup, and this load increased on the hosts with a few windows vm's that are already generating more load that others. Is there a way to disable ksm for specific vm's in the

​Hello, I have been trying to track different phases of a live migration process. I am using libvirt ​with qemu-kvm. I am issuing migration commands using virsh. Now, I want to measure the time spent in each phase of live migration, e.g., pre-copy and stop-copy. I stumbled upon the file qemu_driver.c. It has functions like qemudDomainMigratePrepare2 qemudDomainMigratePerform

Hi all, When I live migrate a vm using "migrate --live --copy-storage-all mig-vm qemu+ssh://192.168.1.3/system tcp://192.168.1.3" I got the following error WARNING: Image format was not specified for 'nbd://node2:49155/drive-virtio-disk0' and probing guessed raw. 258 Automatically detecting the format is dangerous for raw images, write operations on

Per Vlastimil's review comment, Vlastimil, I updated based on your comment. Please review this. If everything is done, I will send v7 rebased on recent mmotm. Thanks for the review! >From ad4157e98651a2d18fd0a4ae90d1d9f609aab314 Mon Sep 17 00:00:00 2001 From: Minchan Kim <minchan at kernel.org> Date: Fri, 8 Apr 2016 10:34:49 +0900 Subject: [PATCH v6r2] mm: migrate: support non-lru

Per Vlastimil's review comment, Vlastimil, I updated based on your comment. Please review this. If everything is done, I will send v7 rebased on recent mmotm. Thanks for the review! >From ad4157e98651a2d18fd0a4ae90d1d9f609aab314 Mon Sep 17 00:00:00 2001 From: Minchan Kim <minchan at kernel.org> Date: Fri, 8 Apr 2016 10:34:49 +0900 Subject: [PATCH v6r2] mm: migrate: support non-lru

Hi all, I'm investigating the ways to improve the live migration performance in libvirt. I have a question about the vm live storage migration. the platform is libvirt + qemu + kvm If we want to migrate a running vm with its virtual disk images to another node. we can use 'virsh migrate ....' commands. What if this vm has a number of disk-only external snapshots? In the current

Hi Eric, Thanks for your reply! I have the follow up questions blew. On Wed, Feb 11, 2015 at 11:52 AM, Eric Blake <eblake@redhat.com> wrote: > On 02/11/2015 10:08 AM, Edward Young wrote: > > Hi all, > > [probably didn't need to cross-post to quite that wide of an audience, > oh well] > > > > > I'm investigating the ways to improve the live

Thanks Eric. So, I need to look at QEMU. Do you know which files/functions should I look at? ​-- Faiz​ On Thu, Mar 20, 2014 at 12:41 PM, Eric Blake <eblake@redhat.com> wrote: > On 03/20/2014 10:05 AM, Faizul Bari wrote: > > ​Hello, > > > > I have been trying to track different phases of a live migration > process. I > > am using libvirt ​with qemu-kvm. I am

No luck with qemu-kvm-ev, the behavior is the same. Running perf record -a -g on the baremetal shows that most of the CPU time is in _raw_spin_lock Children Self Command Shared Object Symbol - 93.62% 93.62% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock - _raw_spin_lock + 45.30%

Hi Eric, Please see the blew: On Wed, Feb 11, 2015 at 3:12 PM, Eric Blake <eblake@redhat.com> wrote: > On 02/11/2015 02:07 PM, Edward Young wrote: > >>> What if this vm has a number of disk-only external snapshots? In the > >>> current version, how can live migrate this vm? > >> > >> Are the snapshots based on shared storage, or local-only

Hi, This is a follow up of the mail regd migration I'd posted a few days ago. My scenario: I'm creating two virtual machines images from an Ubuntu 10.10 iso of RAM size 128 and 700 MB. Using the migrate() , I migrate it from the current physical machine to the destination machine via a 100 Mbps switch LAN connection. BOTH migrations take the same amount of time. Checking out the

Hello, everybody.? ? ?I use?NFS to do live migration?After input ?virsh --connect=qemu:///system --quiet migrate --live vm12 qemu+tcp://pcmk-1/system ?(vm12 ?is vm name,/pcmk-1 is host name)it use almost 10s for preparation.?During the 10s,the vm is still runing and can ping other vm. But if i input mkdir pcmk-6 in vm during the 10s,it say :mkdir: cannot create directory `pcmk-6': Read-only

Hello! Is there some way to migrate guest OS from one Xen-host to another KVM-host using libvirt? (live migration is highly desirable) (Both hosts have the same hardware, Xen running in full-virtualized mode.) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20130205/2e717e62/attachment.htm>