[lkml]   [2004]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] barrier patch set

    On Tue, 2004-03-30 at 23:21, Jeff Garzik wrote:

    > For IDE, O_DIRECT and O_SYNC can use special "FUA" commands, which don't
    > return until the data is on the platter.

    fsync() is still really nasty, because that can require that we wait on
    IO that was submitted by the VM before we knew that there was a
    synchronous IO wait coming. SCSI also has an FUA bit that can make a
    difference if you've got writeback caching enabled. (And FUA on read
    can bypass drive writethrough caches, too, for media verification.)


    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 14:02    [W:0.022 / U:10.028 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site