On Fri, 25 Mar 2016, Josh Poimboeuf wrote: > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 2dc18605..76274b8 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -138,6 +138,7 @@ config X86 > select HAVE_PERF_REGS > select HAVE_PERF_USER_STACK_DUMP > select HAVE_REGS_AND_STACK_ACCESS_API > + select HAVE_RELIABLE_STACKTRACE if X86_64 && FRAME_POINTER
I understand we have to rely on frame pointer for now. Do you plan to switch to dwarf unwinder one day in the future? IOW is there a plan to implement dwarf stuff generation in objtool and then to have a dwarf-based stack unwinder upstream and to use it for live patching? We have FRAME_POINTER unset in SLES for performance reasons (there was some 5 percent slowdown measured in the past. However we should redo the experiments.) and one day we'd really like to switch to upstream from kgraft :). So I'm just asking. Miroslav
