On Tue, Apr 21, 2009 at 07:23:31AM +1000, Paul Mackerras wrote: > Eric Dumazet writes: > > > OK, but we still have a problem on machines with >= 250 cpus, > > because calling 250 times spin_lock() is going to overflow preempt_count, > > as each spin_lock() increases preempt_count by one. > > Huh? Each cpu has its own separate preempt_count. But a single CPU is acquiring one lock per CPU, so all the increments are to one CPU's preempt_count. :-( Thanx, 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
