Linux Kernel Based Virtual Machine

[chuhnk]

http://www.linux-kvm.org/page/Main_Page

[dedward]

One benefit of kernel on kernel virtualization is system calls can be optimized straight through, reducing context switching - better than a hypervisor with custom drivers.

I'm not sure that's what is going on here with KVM - but the principle makes sense.

[koenigdavidmj → dedward]

http://www.openvz.org/ does what you want. The PID:s, network interfaces, and the like are all isolated, but you are only running one kernel on the whole system.

Xen might be work taking a look at as well.

[glhaynes]

Seems preferable for most cases, at least, for it to be user mode, though... maybe you'd want to do this for performance in certain cases?

[rabidsnail → glhaynes]

All modern virtual machines (that is ones that use VT or AMD-V) install kernel extensions. The part of kvm that you interact with is all userland.

[glhaynes → rabidsnail]

So how does the architecture of this differ from something like VMWare?

[dmaz → glhaynes]

http://www.linux-kvm.org/page/FAQ#General_KVM_information

[glhaynes → dmaz]

What is the difference between KVM and VMware? VMware is a proprietary product. KVM is Free Software released under the GPL.

What is the difference between KVM and QEMU? QEMU uses emulation; KVM uses processor extensions (HVM) for virtualization.

Perfect, thanks.

[jrmxrf]

few years ago that would be a news

[phoenix24 → jrmxrf]

With only 6 points, how does this submission show up at the HN front page? or are the submissions ranking even based on points?

[mrduncan → phoenix24]

Votes divided by the age in hours to the gravityth power.

Although, the current algorithm is probably slightly different to combat spammers.

http://github.com/nex3/arc/blob/master/news.arc#L262

[dododo → phoenix24]

i surmise it's the rate at which an article/comment gets points that determines its ranking.