Hi, This is a repost of the generic-ipi block git branch. It contains generic helpers for issuing and handling IPI function calls. It improves smp_call_function_single() so that it is now a scalable interface that doesn't rely on call_lock and it also greatly speeds up smp_call_function(). Microbenchmarks show that it is about 30% faster on call throughput on a simple 2-way SMP system. Benefits should be much higher on bigger systems. Changes since last post: - Address Andrew's review comments - Address Paul's RCU comments. Hopefully everything is covered now, I'd much appreciate a second look at this code Paul! - Drop s390 support, as it currently relies on smp_call_function() not returning before other CPUs are ready (or have) called the passed in function. - Address the x86/xen comments from Jeremy, I hope xen works as expected now. - Address the review comments from Peter. - Various other little things and improvements. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
