Re: frame unwinder patches

[Arjan van de Ven <arjan@infradead.org>]

On Thu, 04 Sep 2008 18:46:52 +0200
Bernd Schubert <bs@q-leap.de> wrote:

> Hello,
> 
> up to 2.6.22 the -mm series had these nice frame unwinder patches, 
> which gave beautiful stack traces. Unfortunately these frame unwinder
> patches seem to have been dropped :(
> 
> Anyone still maintaining updated patches?
> 
> Probably all the "?" lines shouldn't be printed.

printing the ? lines is the result of a compromise between getting the
most reliable information out of a stack trace, and getting a useful
data for the case where not everything is going as well as it should.

not printing the ? would be trivial (for some backtraces we do that),
but so far hasn't been seen as desirable because you lose information
in those hard-to-debug cases when you need anything you can get from
the backtrace.


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