process shared robust mutexes for tdb

[Volker Lendecke]

Hi!

On Sun, Jan 06, 2013 at 07:18:00PM -0500, Ira Cooper wrote:
> Can you run the same test with 1 bucket?  Not that we'd actually want to
> deploy that way, but, the performance of fcntl TDB shouldn't drop that
> much... and it'd give us an estimate of how much we need the 2048 locks vs.
> just using 1.

Under the usual branch

https://git.samba.org/?p=vl/samba.git/.git;a=shortlog;h=refs/heads/tdb

Now find a patchset that survived autobuild for me. It
contains some additional stuff, like a tdb feature flags
field. This could for example take a flag for a dual-linked
freelist and other future improvements.

This is something that I would like to see broader testing
and review of. Getting rid of the fcntl locks in tdb was
something I have wanted to do for a very long time, and
while this is not complete it is a start in that direction.

With best regards,

Volker Lendecke

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