[Kst] [PATCH] Improve locking performance and reduce deadlocks

[George Staikos]

   Eli and I spent more time working on locking and we discovered that it's 
not necessary to lock as much as we have been doing.  This coincidentally 
fixes many deadlock scenarios (though not all of them), and at the same time 
appears to give a huge performance boost.  Patch is attached, but needs 
testing.  Please provide some feedback on this patch -without- 
--with-one-lock enabled.  I'd like to commit this ASAP.  I think this is the 
reason why deadlocks became more visible recently.  Meanwhile we're working 
on fixing the rest of the problem (removing recursive locking in the tree), 
and hopefully we'll have a patch for that next week.

-- 
George Staikos
KDE Developer				http://www.kde.org/
Staikos Computing Services Inc.		http://www.staikos.net/
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