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    SubjectRe: *Still* getting X server hangs under 2.2.x
    Mike...

    On Oct 19, 5:20am, Mike Galbraith wrote:

    > We found a problem with soft-lockup detection. A small but critical
    > bit fell on the floor at some point in time :*/ Please apply the
    > below patchlet. The oopsen you've received to date have been flawed
    > because of this missing bit.
    >
    > --- linux-2.2.12.ikd7/kernel/sched.c.org Tue Oct 19 05:08:18 1999
    > +++ linux-2.2.12.ikd7/kernel/sched.c Tue Oct 19 05:11:34 1999
    > @@ -826,6 +826,9 @@
    >
    > kstat.context_swtch++;
    > get_mmu_context(next);
    > +#ifdef CONFIG_DEBUG_SOFTLOCKUP
    > + prev->deadlock_count=CONFIG_SOFTLOCKUP_THRESHOLD;
    > +#endif
    > switch_to(prev, next, prev);
    > __schedule_tail(prev);
    >

    I applied this patch this weekend, and, wholla (how the hell is this
    "word" supposed to be spelled?), I've been running an 2.2.13pre15+ikd
    with SOFTLOCKUP enabled for over 2 days now. Looks like that fixes
    the SOFTLOCKUP stability problems, at least as far as I can tell.
    I'll run it for a few more days before booting up 2.2.13 to test that.
    Good job!

    BYW, the latest IKD patch does not apply cleanly to 2.2.13 -- is there
    an ikd patch that does? I didn't take the time to find out exactly
    what was the problem, though -- I was in too much of a hurry at the
    time. Also, is there an "official" ikd patch that incorporates the
    above patch? I can't seem to get to 'e-mind.com' to check, but it's
    not out on andrea's page on SuSE.

    That's it for now.

    -Nick

    --
    +-------------------------------+--------------------------------------------+
    | /`--_ Nicholas R LeRoy | In a world without fences, Who needs Gates?|
    |{ }/ Norland Corporation | ---- Experience Linux! ---- |
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    | nick.leroy@norland.com | #include <disclaimer.h> |
    |http://www3.norland.com/~nleroy| These are my own ideas, not my employer's. |
    +----------------------------------------------------------------------------+

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