From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> Date: Sun, 12 Apr 2009 10:31:08 -0700 > On Sun, Apr 12, 2009 at 09:34:27PM +1000, Paul Mackerras wrote: >> Paul E. McKenney writes: >> >> > If the generic implementation is needed only on !SMP systems, that >> > could work. The architectures I would be worried about include >> > powerpc and ia64, which I believe support 32-bit SMP builds. >> >> 32-bit powerpc doesn't have 64-bit atomic operations and does support >> SMP. >> >> What about ARM? I thought they had 32-bit SMP these days as well. > > Some of Steve Hemminger's recent suggestions in this thread seem to me > to avoid this whole issue nicely. But we will see! ;-) I hope so. Eventually it seems that all of the older 32-bit SMP platforms will be run under a bus having to execute some many "efficient" primitives using the "hash table of spinlocks" scheme for synchronization. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
