lkml.org 
[lkml]   [2009]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 10/30] cr: core stuff
    On Mon, Apr 13, 2009 at 04:47:01PM -0500, Serge E. Hallyn wrote:
    > Quoting Alexey Dobriyan (adobriyan@gmail.com):
    >
    > Hi Alexey,
    >
    > as far as I can see, the main differences between this patch and the
    > equivalent in Oren's tree are:
    >
    > 1. kernel auto-selects container init to freeze

    Note, auto-select part was dropped, userspace is required to pass pid of
    container init exactly. This was done to keep semantic of checkpoint(2)
    small and extendable.

    > 2. kernel freezes tasks
    > 3. no objhash taking references

    That's because none needed.

    > 4. no hbuf

    hbuf is an optimization to not allocate/free memory for every image.
    For a start it's unnecessary complication, I just kzalloc/dump/kfree.

    > 5. always require CAP_SYS_ADMIN
    >
    > Are there other differences which you would consider meaningful? Which
    > do you consider the most important?
    >
    > Also, since Dave introduced the fops->checkpoint(), we (or at least I)
    > have been struck by the ugly assymetry with checkpoint() being in fops,
    > and restart() not. Do you have an idea for fixing that?

    Module can legally support C/R for its files.

    In the end it most certainly will end up with module registering restart
    hook for file type N.

    Or module registering hook to restart object type N.

    This is for discussion.


    \
     
     \ /
      Last update: 2009-04-14 17:31    [from the cache]
    ©2003-2011 Jasper Spaans