Messages in this thread | | | Date | Wed, 5 Nov 2008 22:16:59 -0800 | Subject | Re: [patch] sched: fix single-depth wchan output | From | Ken Chen <> |
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On Wed, Nov 5, 2008 at 10:11 PM, Ingo Molnar <mingo@elte.hu> 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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