lkml.org 
[lkml]   [2003]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: I/O issues, iowait problems, 2.4 v 2.6
    Paul Venezia <pvenezia@jpj.net> wrote:
    >
    > On Mon, 2003-11-10 at 23:54, Andrew Morton wrote:
    >
    > > OK, the IO rates are obviously very poor, and the context switch rate is
    > > suspicious as well. Certainly, testing with the single disk would help.
    >
    > I pulled the secondary, reconfigured to single drives and rebooted. All
    > is now well, performance is right where it should be.
    >
    >
    > 0 0 0 1475924 7052 42384 0 0 0 0 1015 6
    > 0 0 0 1475284 7076 42360 0 0 0 156 1041 311
    > 0 0 0 1475284 7076 42360 0 0 0 0 1016 12
    > 0 0 0 1475284 7076 42360 0 0 0 0 1026 30
    > 2 0 0 1252628 7300 258852 0 0 8 37240 1157 119
    > 0 3 0 1027284 7524 478064 0 0 8 66016 1441 317
    > 1 3 0 818132 7728 682948 0 0 4 70752 1439 202
    > 1 3 0 593236 7944 901760 0 0 4 64576 1452 92
    > 0 4 0 531412 8008 961876 0 0 4 63680 1434 97

    OK, so either we broke the driver or there is some tuning sensitivity.

    Could you please do:

    mkdir /sys
    mount none /sys -t sysfs
    cd /sys/block/sdXX/queue
    echo 512 > nr_requests

    and retry the RAID setup?

    Beyond that, dunno. We'll need to hunt down the people who worked on that
    driver.

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

    \
     
     \ /
      Last update: 2005-03-22 13:58    [W:0.022 / U:1.120 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site