Re: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)

Ulrich Drepper
2002-03-19T04:05:51Z

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On Mon, 2002-03-18 at 19:28, Rusty Russell wrote:

> What do you WANT in a kernel primitive then? Given that we now have mutexes,
> what else do we need to make pthreads relatively painless?

I think wrt to the mutexes only wake-all is missing. I don't think that
semaphore semantic is needed in the kernel.

> Look, here is an example implementation. Please suggest:
> 1) Where this is flawed,
> 2) Where this is suboptimal,
> 3) What kernel primitive would help to resolve these?

I'll look at this a bit later.

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