Re: [Qemu-devel] Turning off default storage devices?

[Peter Crosthwaite]

Hi Andy,

On Thu, Apr 10, 2014 at 5:55 AM, Andy Lutomirski <address@hidden> wrote:
> Currently, -M q35 boots linux quite a bit slower than the default
> machine type.  This seems to be because it takes a few hundred ms to
> determine that there's nothing attached to the AHCI controller.
>
> In virtio setups, there will probably never be anything attached to
> the AHCI controller.  Would it be possible to add something like
> -machine default_storage=off to turn off default storage devices?
> This could include the AHCI on q35 and the cdrom and such on pc.
>
> There's precedent: -machine usb=off turns off the default USB
> controllers, which is great for setups that use xhci.
>

Is there a more generic solution to your problem? Can you implement
command line device removal in a non specific way and avoid having to
invent AHCI or even "storage" specific arguments. You could
considering bringing the xhci use case you mentioned under the same
umbrella.

Regards,
Peter

> Thanks,
> Andy
>