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Date: Tue, 28 Dec 2010 08:38:37 +1100 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Steven Rostedt <rostedt@...dmis.org> Cc: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Joerg Sommer <joerg@...a.gnuu.de>, linuxppc-dev <linuxppc-dev@...abs.org> Subject: Re: [PATCH][GIT PULL] powerpc64/tracing: Add frame buffer to calls of trace_hardirqs_on/off On Sat, 2010-12-25 at 16:04 -0500, Steven Rostedt wrote: > > Note, when CONFIG_IRQSOFF_TRACE is set, there's already a bit of > overhead :-) > > Anyway, I'll have to take a look at how the frame pointer is set up. > Or > we could also set up all stacks coming into the kernel to have a > "dummy" > frame pointer that wont hurt anything if we index into it. > > Anyway, I'm off till the new year, so I'll worry about it then ;-) Right, might be simpler to just make them loop back onto themselves or something like that. I can have a look too if I get a chance. Cheers, Ben. -- 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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