| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] running Windows (albeit slowly)
> forgive me if this has been beaten to death but I've been thinking again
> about the problem of running Windows as a guest OS under xen. I
> understand and accept all the arguments of why you need to modify the
> core OS for your virtualization process.
>
> Under the opinion that there is no crime if optimization fails on
> incorrect code, would it not be appropriate to do all the things
> necessary to run Windows unmodified albeit poorly slash slowly?
> assuming of course that people want to run Windows. The only reason I
> do is because of speech recognition requirements but that's a very
> different conversation.
To run unmodified arbitrary OS images you need to be able to
a) provide 'shadow mode' page tables and segmentation
b) trap and virtualize trappable instructions,
c) dynamically scan code for untrappable instructions
and rewrite.
We do most of (a) already; doing (b) is not hard but not done.
Doing (c) is tedious, difficult and fragile.
We're happy for anyone out there to have a go at this, but
we're unlikely to put any effort into it ourselves at this
time. There may be hardware support in the future which makes
(a) and (b) easier and (c) disappear; or MS may themselves
produce a version of XP which doesn't require (c). Who knows
if and when either of these will happen tho...
cheers,
S.
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://productguide.itmanagersjournal.com/
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel
|
|
|
| |
|
Home