[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
I dont have any raids configured at my laptop but had on my production server and the reason, the reason why i've installed kvm on laptop was that i was thinking that its raid problem :) and to reproduce (for me) only i've got to do is fresh ubuntu installation with kvm. i dont know, may be its up to my hardware specs and some of kvm / libvirt code part. but the patch u've provided seems to solve the problem. so there must be something in the changelog -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
I dont have any raids configured at my laptop but had on my production server and the reason, the reason why i've installed kvm on laptop was that i was thinking that its raid problem :) and to reproduce (for me) only i've got to do is fresh ubuntu installation with kvm. i dont know, may be its up to my hardware specs and some of kvm / libvirt code part. but the patch u've provided seems to solve the problem. so there must be something in the changelog -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
domain type='kvm' nametest/name uuidcefb1457-6927-3fde-d0f1-a94c6c1aecb0/uuid memory393216/memory currentMemory393216/currentMemory vcpu2/vcpu os type arch='x86_64' machine='pc-0.12'hvm/type boot dev='hd'/ /os features acpi/ apic/ pae/ /features clock offset='utc'/ on_poweroffdestroy/on_poweroff on_rebootrestart/on_reboot on_crashrestart/on_crash devices emulator/usr/bin/kvm/emulator disk type='file' device='disk' driver name='qemu' type='raw'/ source file='/var/lib/libvirt/images/test.img'/ target dev='vda' bus='virtio'/ address type='pci' domain='0x' bus='0x00' slot='0x05' function='0x0'/ /disk disk type='block' device='cdrom' driver name='qemu' type='raw'/ target dev='hdc' bus='ide'/ readonly/ address type='drive' controller='0' bus='1' unit='0'/ /disk controller type='ide' index='0' address type='pci' domain='0x' bus='0x00' slot='0x01' function='0x1'/ /controller and i run the kvm guest on image. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
domain type='kvm' nametest/name uuidcefb1457-6927-3fde-d0f1-a94c6c1aecb0/uuid memory393216/memory currentMemory393216/currentMemory vcpu2/vcpu os type arch='x86_64' machine='pc-0.12'hvm/type boot dev='hd'/ /os features acpi/ apic/ pae/ /features clock offset='utc'/ on_poweroffdestroy/on_poweroff on_rebootrestart/on_reboot on_crashrestart/on_crash devices emulator/usr/bin/kvm/emulator disk type='file' device='disk' driver name='qemu' type='raw'/ source file='/var/lib/libvirt/images/test.img'/ target dev='vda' bus='virtio'/ address type='pci' domain='0x' bus='0x00' slot='0x05' function='0x0'/ /disk disk type='block' device='cdrom' driver name='qemu' type='raw'/ target dev='hdc' bus='ide'/ readonly/ address type='drive' controller='0' bus='1' unit='0'/ /disk controller type='ide' index='0' address type='pci' domain='0x' bus='0x00' slot='0x01' function='0x1'/ /controller and i run the kvm guest on image. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Have You tried the virt-manager and do You still need my confs? Sorry, i was away for a while. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Have You tried the virt-manager and do You still need my confs? Sorry, i was away for a while. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i will provide config files as soon as i get to laptop. meanwhile i'm usind virt-manager to create kvm guests try it out. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i will provide config files as soon as i get to laptop. meanwhile i'm usind virt-manager to create kvm guests try it out. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
well, as problem solving takes so much time, i had to switch to proxmox, no such problems there. but i still have ubuntu 10.10 with kvm on my laptop, so if there will be something for testing, let me know i will be glad to help with this bug. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
well, as problem solving takes so much time, i had to switch to proxmox, no such problems there. but i still have ubuntu 10.10 with kvm on my laptop, so if there will be something for testing, let me know i will be glad to help with this bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
anything? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
anything? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
and same on the laptop. ive removed the edgers repo, added yours, removed qemu-kvm, isntalled it back and same versions as above are on the semi-production server. something is wrong. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
ok. ill give it a try. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
well, didt help much. still flush process takes up to 46% cpu. i didnt tested much though.. with the edgers version it was 0-1% all the time. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
and same on the laptop. ive removed the edgers repo, added yours, removed qemu-kvm, isntalled it back and same versions as above are on the semi-production server. something is wrong. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
ok. ill give it a try. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
well, didt help much. still flush process takes up to 46% cpu. i didnt tested much though.. with the edgers version it was 0-1% all the time. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
okay, i'll wait to get it tested. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i'm not able to update my current packages for my 10.10 host using this ppa repo. apt says no updates avalible. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
okay, i'll wait to get it tested. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i'm not able to update my current packages for my 10.10 host using this ppa repo. apt says no updates avalible. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
no, i try to update on the semi-production server, not on my laptop atm i've got this: ii qemu-common 0.12.5+noroms-0ubuntu7.1 ii qemu-kvm 0.12.5+noroms-0ubuntu7.1 Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
1. installed the latest kernel, was not able to connect to QEMU in virt-manager :( it just stays in Connecting state. 2.. installed latest qemu-kvm and kvm packages, still not able to connect to it. no information in logs :( during the os boot got this error: init: ureaded main process (265) virt-manager is latest. 3. desided to boot from old kernel with new kvm/qemu and there is no more this error. could You please release this patched qemu-kvm and kvm for maverick? thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Thank You for reply. Actually i was thinking the same about software raid. I will try kvm on my laptop and see if the problem still exists. cant try on same server atm, there are some virtual m$ servers, which are in use. i will report as soon as i can. What we could do if it is all about software raid? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Well, just installed ubuntu 10.10 guest on the 10.10 host on my laptop and i see the same problem. its fresh install and all i've done just run apt-get update and apt-get dist-upgrade and the flush-252:0 process started to use from 12% upto 100% of cpu. any ideas? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i'll try to test it right a way. Thanks -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Thank You for reply. Actually i was thinking the same about software raid. I will try kvm on my laptop and see if the problem still exists. cant try on same server atm, there are some virtual m$ servers, which are in use. i will report as soon as i can. What we could do if it is all about software raid? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Well, just installed ubuntu 10.10 guest on the 10.10 host on my laptop and i see the same problem. its fresh install and all i've done just run apt-get update and apt-get dist-upgrade and the flush-252:0 process started to use from 12% upto 100% of cpu. any ideas? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i'll try to test it right a way. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i still have this problem and cant use any of 10.04 nor 10.10 ubuntu linux in production. no-one interested? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
i still have this problem and cant use any of 10.04 nor 10.10 ubuntu linux in production. no-one interested? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
same history with 10.10 which i'm currently running instead of 10.04.1 LTS -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] Re: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
same history with 10.10 which i'm currently running instead of 10.04.1 LTS -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 703811] [NEW] kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Public bug reported: Hello, Problem: KVM guest's CPU usage goest upto 100% and more (if multi-proc or multi-cores) and makes guest running slowly for period of time when the flush process is running on a virtio storage drive. How to get this problem: just start the guest with virtio storage driver and make the guest do some storage related work (ie apt-get install mc) and watch top. after 2-3 sec the cpu usage will go to 100% and guest will run slowly (so slow, that even munin processes cant do their work in 5 minutes and create an e-mail report, that there are various .lock files present) host: ubuntu 10.04.1 LTS 2.6.32-27-server x86_64 2x Intel(R) Xeon(R) CPU E5620 (total of 16 cpus for os) 12GB RAM 2x software raids: 160GB and 2TB the 160GB one is for system and 2TB one is for kvm images guest: Ubuntu 10.04.1 LTS Disk: virtio network: virtio PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 869 root 20 0 000 S 117 0.0 0:17.80 flush-252:0 252 is the vda disk: monitor@monitor:~$ ls -l /dev/vda brw-rw 1 root disk 252, 0 2011-01-13 16:44 /dev/vda ** Affects: kvm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 703811] [NEW] kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process
Public bug reported: Hello, Problem: KVM guest's CPU usage goest upto 100% and more (if multi-proc or multi-cores) and makes guest running slowly for period of time when the flush process is running on a virtio storage drive. How to get this problem: just start the guest with virtio storage driver and make the guest do some storage related work (ie apt-get install mc) and watch top. after 2-3 sec the cpu usage will go to 100% and guest will run slowly (so slow, that even munin processes cant do their work in 5 minutes and create an e-mail report, that there are various .lock files present) host: ubuntu 10.04.1 LTS 2.6.32-27-server x86_64 2x Intel(R) Xeon(R) CPU E5620 (total of 16 cpus for os) 12GB RAM 2x software raids: 160GB and 2TB the 160GB one is for system and 2TB one is for kvm images guest: Ubuntu 10.04.1 LTS Disk: virtio network: virtio PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 869 root 20 0 000 S 117 0.0 0:17.80 flush-252:0 252 is the vda disk: monitor@monitor:~$ ls -l /dev/vda brw-rw 1 root disk 252, 0 2011-01-13 16:44 /dev/vda ** Affects: kvm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
