[lkml]   [2007]   [Apr]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [00/17] Large Blocksize Support V3
    William Lee Irwin III <> 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
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-04-27 02:35    [W:0.018 / U:10.008 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site