Re: scheduler (sched_4bsd) questions

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

  • Next message: Sam: "AoE for 4.x" 
    Date: Tue, 21 Sep 2004 12:19:30 -0700
To: Julian Elischer <julian@elischer.org>

    Julian Elischer wrote:

    >>
    >>
    >> 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 :-)

    I stand corrected.. the message does appear with no preemption.
    (I was certain that it didn't but.. I can't argue with my eyes..)

    >
    >
    >
    >
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