Re: [Qemu-devel] [Patch] [kinda-resend] persistent real-time-clock

[Anthony Liguori]

Dan Kenigsberg wrote:
> Real PC lets its user set the real-time-clock and store it on CMOS,
> which advances the clock even when the PC is offline.
>
> These patches will allow doing the same with VM:
> - Before shutting a VM down, use the monitor's info timeoffset to see
>   how much (in seconds) does the rtc differ from the host clock.
> - Store this offset somewhere.
> - Use it next time with -startdate now+offset.
>
> Please tell me what do you think of it.
>   

I think a more general mechanism that stored nvram in a file would be 
interesting.  Something like like -nvram file.ram.  This also allows a 
guest to determine it's initial boot device and for that setting to persist.

Regards,

Anthony Liguori

> Dan.
>