Re: can't start hvm with network

[Paul Leiber <paul@xxxxxxxxxxxxxxxx>]

Am 21.03.2025 um 06:09 schrieb Elliott Mitchell:
> On Mon, Mar 17, 2025 at 04:57:03PM +0100, Paul Leiber wrote:
> > Hi Kevin,
> >
> > Am 17.03.2025 um 16:01 schrieb Kevin Wang:
> >
> > On another note: Why are you using HVM for setting up a linux DomU? I never
> > tested Ubuntu myself, but for Debian (and most likely Debian-based)
> > distributions, PV should the better option. Again, [2] shows how to install
> > a Debian PV DomU, and the procedure is still working (of course, wheezy is a
> > bit outdated and needs to be replaced, e. g. with bookworm). The section
> > even mentions Ubuntu distributions, so it's probably worth to dig deeper
> > there.
> If you have even fairly old hardware, rather superior to PV mode is PVH
> mode.  After a few generations of AMD64 hardware all the processors
> started adding an extra page table level.  PVH mode lets the kernel use
> PV drivers, but then use normal page tables on top.  Needs a bit of
> adjustment from PV mode, but yields rather better performance.
>
> I've found HVM mode somewhat handier for initial installation, but once
> installed PVH mode is better (except for the issue of booting non-Linux).
I actually meant PVH, not PV. Thanks for the correction!

Paul