[lkml]   [2004]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: mmap vs. O_DIRECT
    On Mer, 2004-11-10 at 00:05, Bill Davidsen wrote:
    > I have an application which does a lot of mmap to process its data. The
    > huge waitio time makes me think that mmap isn't doing direct i/o even
    > when things are alligned.

    Make sure you are using MAP_SHARED in such cases so that the object you
    have is the page cache object, also remember to use madvise

    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: 2005-03-22 14:07    [W:0.020 / U:16.516 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site