On 11/07/2017 16:42, Kevin Wolf wrote:
Concerning QEMU, could we maybe simply emit a warning a la
"you did not specify a machine type with the -M option, so you are currently running the the 'pc' machine type. Please note that future versions of QEMU might use the 'q35' machine type instead. If you require the 'pc' machine type for your setting, then please specify it with the -M option." Warnings tend to get ignored until things are actually break, so I don't think this helps much. I think simply not having a default machine type (as already suggested elsewhere in this thread) is the best way to deal with this. I would absolutely hate this. One of the nice things about qemu has always been that 'qemu disk.img' is enough to start a simple VM. You only need to touch any other options for things you care about. I wouldn't want to give this up.
I agree. Don't change anything, leave "-M pc" aside, and let libosinfo pick q35 for newer guests. Paolo