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    SubjectRe: [PATCH] updated preempt-kernel
    On 20 Oct 2001 at 03:27, Robert Love wrote:
    > A preemptible kernel. It lowers your latency.

    I'm using 2.4.12-xfs with the preempt-kernel-rml-1 patch. Just this
    morning I noticed a minute or so of the system being in "freeze". There
    was no significant disk activity, my open windows were working (ICQ,
    IPTraf under wterm, Opera), but things like opening a new wterm would work
    but no prompt (bash) would come out, or "ps ax" on a system with stay
    there.

    In the IPTraf window I saw a lot of domain lookups going back and forth.
    Since IPTraf does reverse name lookups I quit it to hopefully bring down
    the load. I'm running bind 9.1.3. After the freeze everything was 100%
    normal. I checked the syslog and found close to a hundred lines one after
    the other about named complaining of a lame server.

    I am under the impression that it was bind hogging system resources,
    although I do not know how to look at historical data of memory usage and
    CPU usage for such a small time.

    I am curious, what does the preempt patch do for such situations? I
    honestly don't know how the system would have felt otherwise (if I didn't
    have support for preemption). And it's not so easy to reproduce since I
    don't cause this myself.

    Thanks for your input, and I'll give your second patch a shot as soon as I
    can. :)

    --> Jijo

    --
    Federico Sevilla III :: jijo@leathercollection.ph
    Network Administrator :: The Leather Collection, Inc.
    GnuPG Key: <http://jijo.leathercollection.ph/jijo.gpg>

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