Re: [Qemu-devel] [PATCH v3 07/19] migration: introduce icount field for snapshots

[Eric Blake]

On 05/23/2018 01:50 AM, Pavel Dovgalyuk wrote:
> Saving icount as a parameters of the snapshot allows navigation between
> them in the execution replay scenario.
> This information can be used for finding a specific snapshot for rewinding
> the recorded execution to the specific moment of the time.
> E.g., 'reverse step' action needs to load the nearest snapshot which is
> prior to the current moment of time .
>
> Signed-off-by: Pavel Dovgalyuk <address@hidden>
>
> --
>
> v2:
>   - made icount in SnapshotInfo optional (suggested by Eric Blake)
> ---

> +++ b/qapi/block-core.json
> @@ -25,13 +25,16 @@
>   #
>   # @vm-clock-nsec: fractional part in nano seconds to be used with vm-clock-sec
>   #
> +# @icount: current instruction count for execution record/replay (since 2.13)

Except now we have moved to calling the next release 3.0 ;)

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org