On Fri, 2015-03-13 at 14:09 +0800, Kevin Hao wrote: > On Thu, Mar 12, 2015 at 04:24:10PM +0100, Torsten Duwe wrote: > > But generally, which platforms would benefit most from this change? > > In theory, the more cpus the platform has, the more serious the thundering > herd problem is. So the latest platforms which has more cpus would benefit > most.
In fact, pseries would be one to benefit ... it would be nice to find a way to sort out the lock owner problem. One idea I had was to keep the owners elsewhere, some kind of hash chain of "taken locks" hashed on the lock address. There shouldn't be *that* many locks held at a given point in time. Trying to keep the owner in a separate & non-atomic part of the lock proved being too hard due to how the lockref and generic code are interwined, though maybe somebody smarter can find a trick :-) Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
