On Tue, Jul 10, 2007 at 07:26:10PM -0700, Christoph Lameter wrote: > On Wed, 11 Jul 2007, Nick Piggin wrote: > > > BTW. some advanced congestion algorithms like HBO may find these ticket > > locks useful because you can see immediately how many CPUs are contending > > the lock, and spinners know how many CPUs are in front of them. That info > > could be fed into the spin backoff scheme. > > That would mean having to keep a lot of status information for a spinlock. > Gets pretty complicated. Did you look at the implementation? It takes 2 bytes on x86 and is almost the same code size and speed as the existing locks.
> The RT tree already converts spinlocks to sleeping locks? If we want to be > that complicated then maybe going with one sophisticated lock type for all > would be the solution. I don't want to convert spinlocks to sleeping locks though. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
