Messages in this thread | | | Date | Fri, 15 Apr 2005 19:42:13 -0400 | From | Benjamin LaHaise <> | Subject | Re: [RFC] Add support for semaphore-like structure with support for asynchronous I/O |
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On Fri, Apr 15, 2005 at 03:42:54PM -0700, Trond Myklebust wrote: > AFAICS You grab the wait_queue_t lock once in down()/__mutex_lock() > order to try to take the lock (or queue the waiter if that fails), then > once more in order to pass the mutex on to the next waiter on > up()/mutex_unlock(). That is more or less the exact same thing I was > doing with iosems using bog-standard waitqueues, and which Ben has > adapted to his mutexes. What am I missing?
I didn't quite see that either.
What about the use of atomic operations on frv? Are they more lightweight than a semaphore, making for a better fastpath?
-ben -- "Time is what keeps everything from happening all at once." -- John Wheeler - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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