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    SubjectRe: [patch] sched: fix single-depth wchan output
    On Wed, Nov 5, 2008 at 10:11 PM, Ingo Molnar <> wrote:
    > hm, this adds overhead - and the thing is that WCHAN is rather
    > uninformative to begin with (because it's a single dimension), so we
    > should phase it out, not expand it.
    > How about adding a /proc/<PID>/stacktrace file that gives us the stack
    > trace of any task in the system? That would be useful for a number of
    > other purposes as well, and about 100 times more useful than wchan.
    > (often it would be more useful than sysrq-t dumps)

    Sure, my main motivation is to remove frame pointer generation. x86_64
    unconditionally adds fp for kernel/sched.c right now. I'm all for
    phasing out wchan if people don't think there is value in it.

    - Ken

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