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Let's step back a bit

Let's step back a bit

Posted Jun 4, 2009 15:42 UTC (Thu) by TomMD (guest, #56998)
In reply to: Let's step back a bit by gwolf
Parent article: Xen again

> Virtualization does not only work at the server farm, it can also be very useful at desktops.

YES! And its not just for x86 anymore, but there are architectures that don't have VT or SVM hackery and are perfectly viable users of Xen. I'd love to run Xen on the (ARM based) beagle board or a BB based laptop.

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Let's step back a bit

Posted Jun 4, 2009 20:29 UTC (Thu) by drag (subscriber, #31333) [Link]

the VT and SVM cpu extensions are only needed for X86 platform because the X68 ISA design is such a huge pile of shit.

KVM works fine on other architectures (like PowerPC), so that is all a bit of a red herring.

For x86 systems that donnot have VT/SVM you can use Kqemu and get similar functionality and speed.

Let's step back a bit

Posted Jun 9, 2009 2:11 UTC (Tue) by xyzzy (subscriber, #1984) [Link]

I migrated my Xen DomUs to kqemu VMs a year ago. I didn't rigourously benchmark but the performance drop was noticeable -- I went from being able to fill 100mbps, to not being able to fill even half of it. And this was with wget and apache and static files, so mostly an I/O performance issue.

Let's step back a bit

Posted Jun 9, 2009 7:50 UTC (Tue) by paulj (subscriber, #341) [Link]

Kqemu is long unmaintained. The Qemu developers are discussing ripping it out. Kqemu guest-kernel-space is very buggy and nearly always unuseable. So any deployment of Kqemu will run guest kernel under emulation, which obviously leads to very poor performance for all applications except those which are near-completely userspace CPU bound.

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