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    SubjectRe: Lots of con-current I/O = resets SATA link? (2.6.25.10)
    On Sun, 6 Jul 2008, Justin Piszcz wrote:
    > On Sun, 6 Jul 2008, Justin Piszcz wrote:
    >> On Sat, 5 Jul 2008, Justin Piszcz wrote:
    >>> On Sat, 5 Jul 2008, Robert Hancock wrote:
    >> After the rebuild is completed I will perform more testing.

    The following setup is in-place:

    Kernel: 2.6.25.10
    Boot options: none
    NCQ: disabled on all disks
    irqbalance: disabled/not running

    Removal of all old test data:

    $ for i in [0-9]*; do rm -rf $i & done
    ..
    [468] 5158
    [469] 5159
    [470] 5160
    [471] 5161
    [472] 5162
    $

    -- no problems yet --

    run untar test+copy test:

    $ mkdir `seq 0 20`
    $ ./runtest.sh

    for i in `seq 0 20`
    do
    cd $i
    tar xf ../linux-2.6.25.10.tar &
    cd ..
    done

    for b in `seq 21 40`
    do
    cp linux-2.6.25.10.tar $b &
    done

    -- waiting for problems --

    If no problems at the end of this test, will start up IRQ balance (how I
    normally ran my system) and re-test to see it is relegated to the irqbalance
    daemon running.

    -----------------------------

    Success ..

    $ du -sh `seq 0 40`
    311M 0
    311M 1
    311M 2
    311M 3
    311M 4
    311M 5
    311M 6
    311M 7
    311M 8
    311M 9
    311M 10
    311M 11
    311M 12
    311M 13
    311M 14
    311M 15
    311M 16
    311M 17
    311M 18
    311M 19
    311M 20
    272M 21
    272M 22
    272M 23
    272M 24
    272M 25
    272M 26
    272M 27
    272M 28
    272M 29
    272M 30
    272M 31
    272M 32
    272M 33
    272M 34
    272M 35
    272M 36
    272M 37
    272M 38
    272M 39
    272M 40

    -----------------------------

    .. no problems ..
    .. proceeded with test mentioned above ..

    Second round:

    The following setup is in-place:

    Kernel: 2.6.25.10
    Boot options: none
    NCQ: disabled on all disks
    irqbalance: enabled

    --

    Remove old cruft:

    $ for i in `seq 0 40`
    > do
    > rm -rf $i &
    > done

    Create new directories, re-run test:

    $ mkdir `seq 0 20`

    $ ./runtest.sh

    .. no problems either ..

    --

    I do not have a method to reproduce the problem at will unfortunately.

    Justin.




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