On Tue, Jan 26, 2010 at 08:56:50AM -0800, Linus Torvalds wrote: <snip> > although it is worth noting that that machine has an Intel SSD, which is > why it gets sped up so much by parallel IO (there's no seek penalty, and > it is able to read multiple channels in parallel, so this gives much > better IO patterns for it - with rotational media the numbers might be > very different). For rotational disks, using FIEMAP to get the position of the files on disk to reorder how we read them could help. Mike -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html