Re: [PATCH][GIT PULL] trace,x86: Move creation of irq tracepointsfrom apic.c to irq.c

From: Steven Rostedt
Date: Fri Jun 21 2013 - 17:28:23 EST

On Fri, 2013-06-21 at 14:13 -0700, H. Peter Anvin wrote:
> On 06/21/2013 02:09 PM, Steven Rostedt wrote:
> > Call Trace:
> > [<ffffffff8103539d>] do_fork+0xa8/0x260
> > [<ffffffff810ca7b1>] ? trace_preempt_on+0x2a/0x2f
> > [<ffffffff812afb3e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> This bit of the call chain seems a little odd, no?

Doesn't the "?" mean its just in the stack but not part of the call
frame that was used. CONFIG_FRAME_POINTER is set in the config.

With lockdep and preempt tracing enabled, why would this seem strange?

-- Steve

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