[CRIU] combining pre-copy and post-copy doesn't work anymore

[Adrian Reber]

Hello Mike,

I just tried lazy migration in combination with pre-dumping. In my tests
it fails and I wanted to ask if you tested it recently?

(46.566404) polling timeout
(46.566415) lazy-pages: Start handling remaining pages
(46.566417) pr2 Read b0e000 1 pages
(46.580431) lazy-pages: 1119: uffd_copy: 0xb0e000/4096
(46.580447) Error (criu/uffd.c:529): lazy-pages: 1119: UFFDIO_COPY failed: rc:-1 copy:-17
(46.580452) polling timeout
(46.580454) pr2 Read dba000 1 pages

Or is this works as designed as the page is already in the parent
image? The error message just sounds a bit scary.

The restore does not work, so something seems wrong. The lazy-pages
daemon ends with 0 and:

lazy-pages: Process 1119: with UFFD transferred pages: (1777/1777)

		Adrian