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Date: Mon, 2 Jun 2008 12:41:50 +0200 From: Ingo Molnar <mingo@...e.hu> To: Steven Rostedt <rostedt@...dmis.org> Cc: Abhishek Sagar <sagar.abhishek@...il.com>, Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] ftrace: distinguish kretprobe'd functions in trace logs * Steven Rostedt <rostedt@...dmis.org> wrote: > On Wed, 28 May 2008, Abhishek Sagar wrote: > > > > But if irq_enter() has a kretprobe installed on it, the return value stored on the stack at each invocation is modified to divert the return to a kprobe trampoline function called kretprobe_trampoline(). So with this the trace would (currently) look like: > > > > <idle>-0 [00] 4154504455.781616: irq_enter <- kretprobe_trampoline > > > > Now this is quite misleading to the end user, as it suggests something that didn't actually happen. So just to avoid such misinterpretations, the inlined patch aims to output such a log as: > > > > <idle>-0 [00] 4154504455.781616: irq_enter <- [unknown/kretprobe'd] > > > > > > Signed-off-by: Abhishek Sagar <sagar.abhishek@...il.com> > > Thanks Abhishek, > > Acked-by: Steven Rostedt <srostedt@...hat.com> applied to tip/tracing/ftrace, thanks. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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