Re: [PATCH V1 14/32] savevm: VMS_RESTART and cprsave restart

[Eric Blake]

On 7/30/20 10:14 AM, Steve Sistare wrote:
> Add the VMS_RESTART variant of vmstate, for use when upgrading qemu in place
> on the same host without a reboot.  Invoke it using:
>    cprsave <filename> restart
>
> VMS_RESTART supports guest ram mapped by private anonymous memory, versus
> VMS_REBOOT which requires that guest ram be mapped by persistent shared
> memory.  Subsequent patches complete its implementation.
>
> Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
> ---

> +++ b/qapi/migration.json
> @@ -1639,6 +1639,7 @@
>   #
>   # @file: name of checkpoint file
>   # @mode: 'reboot' : checkpoint can be cprload'ed after a host kexec reboot.
> +#        'restart': checkpoint can be cprload'ed after restarting qemu.

This should be a modification to an enum type (the 'CprMode' type I 
suggested earlier in the series).

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org