[CRIU] [PATCH 6/9] x86: cpu -- Use special bit for image manipulation

[Dmitry Safonov]

2018-08-07 17:35 GMT+01:00 Cyrill Gorcunov <gorcunov at gmail.com>:
> Current scheme of when to write and verify cpuinfo
> images is unclear: we define default mode to 'fpu'
> and this implies that no cpuinfo image get written
> on dump and read on restore. In turn if 'cpu' or
> 'ins' mode specified in command line we write and
> verify this image.
>
> This is all wrong -- we need to produce image if
> any mode ecxept 'none' is specified. The 'none'
> mode is designed exactly for skipping cpuinfo
> image production or verification.
>
> Because any non-default mode requires explicit
> --cpu-cap option to be passed we can use this
> and setup new CPU_CAP_IMAGE telling criu to
> write or read this image.
>
> Note the default mode doesn't break backward
> compatibility because by default we don't
> write or read the image at all.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>

Reviewed-by: Dmitry Safonov <0x7f454c46 at gmaill.com>

Thanks,
             Dmitry