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

[Avi Kivity <avi@qumranet.com>]

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.
>   

How about (additionally) modifying -startdate to accept an offset directly?

   qemu -startdate +0300 ...

Useful for those Windows VMs which have localtime in cmos.

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