[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] HVM on 3.2 kernel hdd speed issue

Am 02.04.2012 12:15, schrieb Mario:
Well this was not the case on 2.6.34 dom0 kernel, and since windows
HVM does not need PVonHVM, i dont understand why would linux domUs
need it?

This has nothing to do with the Dom0-kernel - PVonHVM is an interface which exposes the PV infrastructure (i.e., para-virtualized disk and net) to fully virtualized guests. The Linux-kernel contains the respective DomU-side code since some time around 2.6.38 natively, and when using Xenified kernels, the corresponding infrastructure dates back to around 2.6.32 (IIRC).

Windows, of course, does not natively support PVonHVM in any way (except when using corresponding drivers to enable that), so if you get excessively slower I/O-speeds on "fully" virtualized Linux DomUs than you do on Windows DomUs which _don't_ have the corresponding PV-drivers installed, something else is amiss here; it'd help if you could describe your setup in a little more detail.

--- Heiko.

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.