Re: [PATCH v2 2/3] mutex: add support for reservation style locks,v2

From: Peter Zijlstra
Date: Wed Apr 10 2013 - 03:34:49 EST

On Tue, 2013-04-09 at 18:42 -0400, Steven Rostedt wrote:
> What about setting an age as soon as it starts the process
> of grabbing one of these locks? And it keeps the age until it
> successfully grabs and releases all the locks again. It wont reset if
> it
> had to drop the locks and start over.

That is indeed the proposed mechanism. It ensures FIFO fairness between
the various threads that try to acquire a set.

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