Re: WARNING: at kernel/trace/ftrace.c:1605__ftrace_hash_rec_update.part.37+0x20a/0x240()

From: Dave Jones
Date: Mon Jun 10 2013 - 20:37:25 EST

On Mon, Jun 10, 2013 at 08:33:14PM -0400, Steven Rostedt wrote:
> On Mon, 2013-06-10 at 19:48 -0400, Dave Jones wrote:
> > 3.10-rc5 + the two patches referenced in the RCU thread from earlier.
> >
> > Dave
> >
> > [ 2313.381283] WARNING: at kernel/trace/ftrace.c:1605 __ftrace_hash_rec_update.part.37+0x20a/0x240()
> Grumble,
> Somehow the list of functions that perf enabled got out of sync with
> what ftrace had. When perf disabled its list of functions from ftrace,
> perf thought it had a function enabled that wasn't and ftrace cried
> about that.
> What does 'trinity-child2' do?

Same as all the other child processes. Random syscalls, semi-intelligent args.

> and is this reproducible?

I'm sure I'll hit it again eventually. The This one looks tricky because
the trace isn't a syscall that I can go hammer on, it's happening
at process exit time.


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