Paul E. McKenney writes: > But a single CPU is acquiring one lock per CPU, so all the increments > are to one CPU's preempt_count. :-( OK, I see, so a task can't take more than 255 spinlocks without overflowing the preempt count, which seems a bit limiting. There are 6 free bits in the preempt_count currently, so the preempt count could be expanded to 14 bits, which would be enough for all current systems. Beyond that I guess we could make preempt_count be a long and allow bigger counts on 64-bit architectures. Paul. -- 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
