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    SubjectRe: [RFC v13][PATCH 00/14] Kernel based checkpoint/restart
    On Thu, 12 Feb 2009 13:30:35 -0600
    Matt Mackall <mpm@selenic.com> wrote:

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