From: Andi Kleen <[EMAIL PROTECTED]>
Date: Tue, 7 Mar 2006 16:39:58 +0100

> Also the locking requirements would need to be defined. The originals
> didn't have any locking at all.

You don't need any locking, just a producer and consumer index in
seperate cache lines, and a wakeup protocol that makes sure
events do not get missed.
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