Various micro optimizations of the block direct IO path. This addresses all review comments and adds an additional prefetch optimization that gives another about 0.3% in a large macro benchmark. Overall the patchkit is worht about 2.2% in the same macro benchmark. I also ported it to current mainline, resolving some conflicts with hch's recent changes to direct-io. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
