On 05/24/2010 03:35 PM, Jan Kiszka wrote:
In contrast to save/loadvm, device_show does not provide a backward-compatible output. Not only field names can change (as a result of internal refactoring),
Field names could change, but that seems unlikely and unnecessary.
fields may even disappear,
That would break live migration. The output of device_show when specifying -M pc-0.13 should always be the same. If it's not, I believe that's a bug.
The output of device_show across multiple qemu versions without specifying a -M could certainly be different but that's to be expected since you have a different hardware model.
new ones may pop up. vmstate makes this transparent for reading of old states, but not for visualization. That said, I see no use case yet that would justify the effort for making state dumps as stable as vmstates.
They already are. It's just a matter of whether we declare it as such AFAICT.
Regards, Anthony Liguori
Jan
