Re: [PATCH v3 00/10] x86: ORC unwinder (previously undwarf)

From: Josh Poimboeuf
Date: Wed Jul 12 2017 - 18:48:07 EST

On Wed, Jul 12, 2017 at 03:30:31PM -0700, Andi Kleen wrote:
> Josh Poimboeuf <jpoimboe@xxxxxxxxxx> writes:
> >
> > The ORC data format does have a few downsides compared to DWARF. The
> > ORC unwind tables take up ~1MB more memory than DWARF eh_frame tables.
> >
> Can we have an option to just use dwarf instead? For people
> who don't want to waste a MB+ to solve a problem that doesn't
> exist (as proven by many years of opensuse kernel experience)
> As far as I can tell this whole thing has only downsides compared
> to the dwarf unwinder that was earlier proposed. I don't see
> a single advantage.

Improved speed, reliability, maintainability. Are those not advantages?