Re: [RFC v13][PATCH 00/14] Kernel based checkpoint/restart

On Thu, 12 Feb 2009 13:30:35 -0600
Matt Mackall [off-list ref] wrote:

On Thu, 2009-02-12 at 10:11 -0800, Dave Hansen wrote:

quoted

quoted

- In bullet-point form, what features are missing, and should be added?

 * support for more architectures than i386
 * file descriptors:
  * sockets (network, AF_UNIX, etc...)
  * devices files
  * shmfs, hugetlbfs
  * epoll
  * unlinked files

quoted

 * Filesystem state
  * contents of files
  * mount tree for individual processes
 * flock
 * threads and sessions
 * CPU and NUMA affinity
 * sys_remap_file_pages()

I think the real questions is: where are the dragons hiding? Some of
these are known to be hard. And some of them are critical checkpointing
typical applications. If you have plans or theories for implementing all
of the above, then great. But this list doesn't really give any sense of
whether we should be scared of what lurks behind those doors.

How close has OpenVZ come to implementing all of this?  I think the
implementatation is fairly complete?

If so, perhaps that can be used as a guide.  Will the planned feature
have a similar design?  If not, how will it differ?  To what extent can
we use that implementation as a tool for understanding what this new
implementation will look like?

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