Orphaning libunwind

[Josh Boyer]

On Mon, Nov 26, 2012 at 9:29 AM, Jiri Olsa <jolsa at redhat.com> wrote:
>> > If perf winds up getting stuck relying on an orphaned library for some
>> > non-trivial amount of time,
>>
>> AFAIK that is common in Fedora there are orphaned libraries in use for
>> a release or two.
>>
>>
>> > I'd rather just turn off libunwind support in perf now.  It's only enabled
>> > in rawhide at the moment because it is a 3.7 feature.  Before we bring 3.7
>> > back to f17-f18, we should probably decide.
>>
>> That is more a question to Jiri Olsa, the author of perf libunwind client.
>
> it will be configurable for both libunwind and elfutils unwinders,
> and making default the one with better results or available
>
> I should send upstream perf changes within this week

Those won't make it into the kernel until 3.8 though.  So for 3.7, I'm
thinking we should just disable perf libunwind support entirely.  Once
elf-utils gets its unwinder and the patches for perf hit rawhide we can
turn it back on.

josh