William Lee Irwin III <[EMAIL PROTECTED]> writes: >> In memory as on disk, contiguity matters a lot for performance.
On Thu, Apr 26, 2007 at 12:21:24PM -0600, Eric W. Biederman wrote: > Not nearly so much though. In memory you don't have seeks to avoid. > On disks avoiding seeks is everything. I readily concede that seeks are most costly. Yet memory contiguity remains rather influential. Witness the fact that I'm now being called upon a second time to adjust the order in which mm/page_alloc.c returns pages for the sake of implicitly establishing IO contiguity (or otherwise determining why things are coming out backward now). -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
