Linus wrote:
> For this, there is a nice
>
> atomic_dec_and_lock()
>
> function that is the same as "atomic_dec_and_test()", except it grabs the
> lock if the count decrements to zero.
If we take Robin's idea to add a spinlock per cpuset, then yes this
atomic_dec_and_lock() might be useful. Thanks for mentioning it.
I am not convinced we need to go that way. See my upcoming replies to
Simon and Robin, for alternative approaches that are simpler.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <[email protected]> 1.650.933.1373, 1.925.600.0401
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