I/O devices are only getting faster. In fact, they're getting closer and closer to memory in latency and bandwidth. But the VM is still designed to do very orderly and costly procedures to reclaim memory, and the existing algorithms don't parallelize particularly well. They hit contention on mmap_sem or the lru locks well before all of the CPU horsepower that we have can be brought to bear on reclaim. Once the latency to bring pages in and out of storage becomes low enough, reclaiming the _right_ pages becomes much less important than doing something useful with the CPU horsepower that we have. We need to talk about ways to do reclaim with lower CPU overhead and to parallelize more effectively. There has been some research in this area by some folks at Intel and we could quickly summarize what has been learned so far to help kick off a discussion. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>