Messages in this thread | | | Date | Tue, 22 Feb 2011 15:58:12 +0530 | From | Bharata B Rao <> | Subject | Re: [CFS Bandwidth Control v4 0/7] Introduction |
| |
On Mon, Feb 21, 2011 at 10:47:12AM +0800, Xiao Guangrong wrote: > On 02/16/2011 11:18 AM, Paul Turner wrote: > > Hi all, > > > > Please find attached v4 of CFS bandwidth control; while this rebase against > > some of the latest SCHED_NORMAL code is new, the features and methodology are > > fairly mature at this point and have proved both effective and stable for > > several workloads. > > > > As always, all comments/feedback welcome. > > > > Hi Paul, > > Thanks for the great features! > > I applied the patchset to kvm tree, then tested with kvm guest, unfortunately, > it seems don't work normally. > > The steps is follow: > > # mount -t cgroup -o cpu none /mnt/ > # qemu-system-x86_64 -enable-kvm -smp 4 -m 512M -drive file=fc64.img,index=0,media=disk > > Don't do any configuration in cgroup, and run the kvm guest directly (don't use libvirt), > the guest booted very slowly and i saw some "soft lockup" bugs reported in the guest, > i also noticed one CPU usage is 100% for more than 60s and other CPUs is 10%~30% in the host > when guest was booting. > > And if cgroup is not mounted, the guest runs well. >
Hi Xiao Guangrong,
Thanks for testing the patches. I do see some soft lockups in the guest when I mount the cgroup and start VM using qemu-kvm.
Will get back after further investigation.
Regards, Bharata.
| |