lkml.org 
[lkml]   [1999]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: APM killing low-latency performance on BX mainboard (we need a method to disable it dynamically)
    On Wed, Nov 10 1999, Benno Senoner wrote:
    > I discovered a small (but easy to correct) problem:
    >
    > by default ATAPI CDROM driver run with DMA , unmaskirq and 32bit I/O
    > all three disabled. You can tune this using
    > hdparm -d 1 -u 1 -c 1 /dev/hdc or so , but the problem is that
    > you can't do this when there is no CD in the drive.

    That's the _old_ O_NONBLOCK bug again. The distros should
    fix hdparm - there's nothing preventing your from changin
    parameters without a disc in the drive.

    --
    * Jens Axboe <axboe@image.dk>
    * Linux CD-ROM Maintainer
    * http://www.kernel.dk

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:54    [W:0.020 / U:3.588 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site