Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation

[Richard Henderson]

On Fri, Dec 16, 2005 at 02:53:06PM -0800, David S. Miller wrote:
> I'll have to add "put write prefetch in CAS sequences" onto my sparc64
> TODO list :-)

You might consider just beginning your loops like

        mov     zero, old
        cas     [mem], zero, old

to do the initial read, since old will now contain the 
contents of the memory, and we havn't changed the memory.


r~