[Ksummit-discuss] [CORE TOPIC] live patching

Jiri Kosina jkosina at suse.com
Wed Jul 8 21:21:42 UTC 2015


On Thu, 9 Jul 2015, Masami Hiramatsu wrote:

> > - stack unwinding has so far been deemed purely debugging facility, with 
> >   no correctness guarantees whatsoever. One of the possible aproaches to
> >   improving the coverage of live patching infrastructure would assume
> >   100% reliability of in-kernel stack unwinding.
> > 
> >   Is this something that should be pursued further? Especially opinions 
> >   and comments from various arch maintainers would be welcome
> 
> Yeah, at least the live patch would be better to depend on a frame-pointer
> to improve correctness...

I actually think that Josh is planning to add dwarf2 CFI support as well 
(but yes, first step is getting frame pointer based unwinding to work 
properly).

Thanks,

-- 
Jiri Kosina
SUSE Labs


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