[FTRACE] Enabling function_graph causes OOPS

[Steven Rostedt]

On Mon, 2009-09-14 at 18:00 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2009-09-14 at 06:25 +1000, Benjamin Herrenschmidt wrote:
> > > > .../...
> > > > 
> > > > > Something is totally messed up here.
> > > > 
> > > > Could it be that we don't handle R_PPC64_ADDR16_* relocs in
> > > > arch/powerpc/kernel/modules/module_64.c ?
> > > > 
> > > > Sachin, do you see a bunch of "Unknown ADD relocation" in your dmesg ?
> > > 
> > > Ben,
> > > 
> > > The thing is, this is kernel proper. This code is in entry_64.S not in
> > > the module code.
> > 
> > Argh... indeed.
> > 
> > Sachin, can you give me more details on how you built that kernel ? (or
> > give them again in case I missed them the first time around :-), ie,
> > what toolchain, options, etc... or even better, give me remote access to
> > the build host ?
> 
> Ok, got access and had a quick look... seems to be a toolchain problem
> to me. I'll investigate more tomorrow.

Hi Ben,

Any more word on this issue?

-- Steve