Re: [PATCH V5 00/19] Live update: cpr-exec

[Peter Xu <peterx@redhat.com>]

On Wed, Oct 01, 2025 at 08:33:52AM -0700, Steve Sistare wrote:
> This patch series adds the live migration cpr-exec mode.
> 
> The new user-visible interfaces are:
>   * cpr-exec (MigMode migration parameter)
>   * cpr-exec-command (migration parameter)
> 
> cpr-exec mode is similar in most respects to cpr-transfer mode, with the
> primary difference being that old QEMU directly exec's new QEMU.  The user
> specifies the command to exec new QEMU in the migration parameter
> cpr-exec-command.

It turns out I was right where I replied to patch 5; this fails the Windows
build.

Smallest fix is to wrap qemu_memfd_create() with a CONFIG_LINUX ifdef,
returning -1 to mfd otherwise.

A better one is we only include cpr*.c in meson.build if it's linux.
Personally I'm OK if we go with the smaller one as of now, however then it
would definitely be nice to have a follow up series to reach the better
solution, if that makes sense.

Feel free to use "make docker-test-build@fedora-win64-cross" for verifying
the changes.  I hope it'll work for you, even if for me currently it didn't
work due to a gitlab.com dns resolution pulling dtc src, where I didn't dig
deeper yet..

The other thing is, this series doesn't apply on master branch.  I didn't
feel confident to do it myself on the vfio change, please have a look on
both issues.

Thanks,

-- 
Peter Xu