Re: [Qemu-devel] On block interface types in general, IF_AHCI in particular

[Paolo Bonzini]

Il 31/10/2012 15:43, Alexander Graf ha scritto:
> 
> On 31.10.2012, at 15:40, Paolo Bonzini wrote:
> 
>> Il 31/10/2012 15:20, Markus Armbruster ha scritto:
>>> One more thing: on a *major* upgrade, I'd rather deal with
>>> immediately obvious breakage (does not boot) than rotten
>>> performance.
>>> 
>>> If we make "q35 with compat IDE" the default, we'll have to tell
>>> users many, many times not to use the default :(
>> 
>> Well, compat IDE is not on the same league as writethrough for bad 
>> performance, and virtio is anyway the better choice (and not
>> available just with a different machine type).
> 
> Are you seriously considering to carry that IDE legacy around simply
> because we are too dumb to create working command line options? AHCI
> gets you at least parallel disk access, so in most cases it's a lot
> more sane than IDE.

What's wrong with "-M q35" (which would go along with "-M piix" for
absolute legacy)?

I'm just saying that the default machine type ("-M pc") should boot
Windows XP.

Paolo