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SubjectRe: [RFC][PATCH 0/3] ftrace: Add dynamically allocated trampolines
On Thu, Jul 10, 2014 at 11:44:43PM +0200, Jiri Kosina wrote:
> On Thu, 10 Jul 2014, Josh Poimboeuf wrote:
>
> > I did some testing with kpatch and I found one minor issue. The dynamically
> > allocated trampoline seems to confuse dump_stack() somewhat.
> >
> > I added a dump_stack() call in my ftrace_ops callback function
> > (kpatch_ftrace_handler) which had a filter on meminfo_proc_show().
>
> Interesting. Are you using dwarf2 unwinder for stack dumping by any
> chance?

I think so (but not sure). How can I check? I do see the following
macros being defined in my kernel build:

-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1

> It seems to get things right here. Will look into it more tomorrow.

Thanks, please let me know what you find...

--
Josh


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