Avi Kivity wrote:
On 12/20/2009 04:48 PM, Anthony Liguori wrote:
Avi Kivity wrote:
Maybe we should make -cpu host the default. That will give the best
performance for casual users, more testing for newer features, and
will force management apps to treat migration much more seriously.
The downside is that casual users upgrading their machines might
experience issues with Windows. Feature compatibility is not just
about migration.
Yes, I'd much rather do this than mucking with vendor_id. If we're
going to give up on cross vendor migration by default, I think we
should go for best performance.
If we do this, we need to advertise it clearly:
- casual (non-management-app-using) users will start seeing problems
with Windows guests unless they change their command lines
Assuming their migrating across different CPU types.
- management apps really have to take cpuid into account now
(previously, it was just a good idea)
Yes. I think we probably should have a management app writers guide
that spells out all of the quirks and best practices that we often
discuss here and assume that management app writers are going to follow.
Sounds like a good thing to live in the proposes docs directory :-)
Regards,
Anthony Liguori
