On Sun, Jul 07, 2002 at 07:52:34PM -0700, Dave Hansen wrote:
> Well, I certainly have the hardware to measure the difference. But, I
> seem to remember several conversations in the past where people didn't
> like this behavior.
> http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&threadm=linux.kernel.3C62DABA.3020906%40us.ibm.com
I think this is a very different philosophy. That's "well, this should
be a spinlock, but sometimes we sleep, and we don't want to think about
it too hard, so let's invent a magical lock". This is "sometimes we
don't hold semaphores for very long so we can improve performance by
spinning 1000 times before sleeping".
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