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    SubjectRe: [PATCH] move put_task_struct() reaping into a thread [Re: 2.6.18-rt1]
    On Thu, Sep 21, 2006 at 12:18:40AM -0700, Bill Huey wrote:
    > On Thu, Sep 21, 2006 at 08:54:02AM +0200, Ingo Molnar wrote:
    > > that you saw crashes under 2.6.17 - but did you manage to figure out
    > > what the reason is for those crashes, and do those reasons really
    > > necessiate the pushing of task-reapdown into yet another set of kernel
    > > threads?
    > Unfortunately no. I even used Robert's .config on my machine. I added a
    > disk controller and networking device driver just to boot into his
    > configuration and I still couldn't replicated any of his kjournald problems
    > at all. If I had his hardware I'd have a better way of replicating those
    > problems and pound it out.

    Robert's stack traces looked completely wrong as well which is why I gave up.
    Symbols showing up in this stack traces should have been completely compiled

    Also, triggering a panic() at the beginning of the rt mutex acquire was
    very useful since it made "in_atomic()" violations an explicit error stopping
    the machine. Stack traces started to get really crazy in this preemptive
    kernel with all sorts of things running unlike the non-preemptive kernel and
    it was time consuming to figure out the real stuff from the noise in the
    stack trace.

    It made the stack traces smaller and more immediately local to the problem
    logic. Then I discovered panic() didn't work correctly in -rt so I fixed that
    as well. There were a lot of little breakdowns in 2.6.17-rt...


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