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[PATCH 0/5] percpu_counter: modifications to __percpu_counter_add_unless

To: xfs@xxxxxxxxxxx
Subject: [PATCH 0/5] percpu_counter: modifications to __percpu_counter_add_unless_lt()
From: Alex Elder <aelder@xxxxxxx>
Date: Wed, 22 Dec 2010 21:56:07 -0600
Reply-to: aelder@xxxxxxx
This series is based on (i.e., applies on top of)
the third patch in Dave Chinner's scalability series
(lib: percpu counter add unless less than functionality).
I had some questions while reviewing that patch, and
after closer inspection I think I found what I think
are some problems, and in order to work through them
I came up with this patch series to lay out what I
think the problems are and my attempt at addressing

The series has been rearranged a bit since I put it
together.  Patch 3 includes some background and
terminology that might be more useful at the
beginning, but I'm leaving it as-is for now.

The more I look at the end result of the series the
more confident I am that it's correct.  However I
still need some convincing--either to point out
where I've got something wrong, or to affirm that
what I have is right.


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