Date: Fri, 4 Feb 2000 04:06:28 +0100 (CET)
From: Andrea Arcangeli <andrea@suse.de>
I developed from scratch rw semaphores based on spinlocks. The
overhead seems quite load by looking the code and they are at least
quite obviously right ;). BTW, they are not architecture-dependent
so other archs can cut and past if necessary.
Although the generic implementation is useful, the Alpha
version should use the ll/sc atomic update sequences.
Have a look at the sparc64 version for one way to implement
that.
Later,
David S. Miller
davem@redhat.com
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