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    SubjectRe: 2.6.17-rc5-mm1
    Ingo Molnar wrote:
    > * Martin J. Bligh <mbligh@mbligh.org> wrote:
    >
    >
    >>>AFAICS this isnt the lock validator but the normal mutex debugging code
    >>>(CONFIG_DEBUG_MUTEXES). The log does not indicate that lockdep was
    >>>enabled.
    >>
    >>Buggered if I know how that got turned on. I thought we turned it off
    >>by default now? That's what screwed up all the perf results before.
    >>
    >>http://test.kernel.org/abat/33803/build/dotconfig
    >>That's the build config it ran with.
    >>
    >>CONFIG_DEBUG_MUTEXES=y
    >
    >
    > still ... it shouldnt have crashed on us. I did change it in -mm1 so
    > i'll take a look tomorrow.
    >
    >
    >>Grrr. Humpf. I can't see the option being turned on for lockdep ...
    >>what was the config option, and is it enabled by default?

    In the -mm1 patch:

    config DEBUG_MUTEXES
    - bool "Mutex debugging, deadlock detection"
    - default n
    + bool "Mutex debugging, basic checks"
    + default y

    Please don't do thatas a default.
    It fucks up all the performance checking ;-(


    M.
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