Changes

These for are delayed till the last stage for the reasons described further. On this stage CRIU opens files, prepares namespaces, maps (and fills with data) private memory areas, creates sockets, calls chdir() and chroot() and dome some more.

These for are delayed till the last stage for the reasons described further. On this stage CRIU opens files, prepares namespaces, maps (and fills with data) private memory areas, creates sockets, calls chdir() and chroot() and dome some more.

=== Switch to restorer context, restore the rest and continue ===

=== Switch to [[restorer context]], restore the rest and continue ===

The reason for restorer blob is simple. Since criu morphs into the target process, it will have to unmap all its memory and put back the target one. While doing so some code should exist in memory (the code doing the munmap and mmap). So we introduced the restorer blob -- the small piece of code, that doesn't intersect with criu mappings AND target mappings. At the end of stage 2 criu jumps into this blob and restores the memory maps.

The reason for restorer blob is simple. Since criu morphs into the target process, it will have to unmap all its memory and put back the target one. While doing so some code should exist in memory (the code doing the munmap and mmap). So we introduced the restorer blob -- the small piece of code, that doesn't intersect with criu mappings AND target mappings. At the end of stage 2 criu jumps into this blob and restores the memory maps.