On 08/21/2012 04:51 PM, Boaz Harrosh wrote:

On 08/21/2012 03:29 PM, J. Bruce Fields wrote:
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quoted

OK.  So if you don't mind the fact that there are filesystems with
inotify support but not filehandle support, then I think generating a
filehandle early as you describe would work.  I guess it's a little more
memory per watched inode.

For the minority of FSs that do not have a filehandle support it should
be easy to generate a generic one, that should work 95% of the time.

Yup, this is how exportfd_encode_fh currently works.

Are we guaranteed that after the checkpoint restore the version of
the Kernel is the same as the one that did the checkpoint? If yes
then I don't see any problem.

Strictly speaking -- no we don't. Migration should to work across kernel
versions (from older to newer). Why kernel version matters in this case?

quoted

--b.

Cheers
Boaz