Re: scheduler (sched_4bsd) questions

From: Julian Elischer (julian_at_elischer.org)
Date: 09/21/04

  • Next message: Julian Elischer: "Re: scheduler (sched_4bsd) questions" 
    Date: Tue, 21 Sep 2004 12:15:05 -0700
To: Stephan Uphoff <ups@tree.com>

    >
    >
    >Great news ! - I actually switched target machines just when this
    >started to happen and thought the cdrom of the new target was bad and
    >disconnected it ;-)
    >
    >I reconnected it this morning and did a little debugging.
    >Looks like an interrupt race condition in the ata code.
    >Can you try the following patch?
    >

    awsome!
    ----------------
    ad0: 9541MB <ST310211A/3.39> [19386/16/63] at ata0-master UDMA100
    ATAPI_RESET time = 50us
    acd0: CDROM <CDU5211/YYS2> at ata1-master PIO4
    Mounting root from ufs:/dev/ad0s1a
    ------------------

    notice there is still a single reset message, that doesn't appear
    without PREEMPTION
    but now boots take less than 5 minutes :-)

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