Messages in this thread | | | Date | Fri, 5 Sep 2008 11:43:16 +0200 | From | Andi Kleen <> | Subject | Re: frame unwinder patches |
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On Fri, Sep 05, 2008 at 11:24:16AM +0200, Bernd Schubert wrote: > On Thursday 04 September 2008 21:13:58 Andi Kleen wrote: > > Bernd Schubert <bs@q-leap.de> writes: > > > 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? > > > > The SUSE kernel rpm should have an uptodate set > > > > (ftp.suse.com/pub/projects/kernel/HEAD ) > > > > Thanks Andi, found it! If someone else needs it, the correct path is > ftp://ftp.suse.com/pub/projects/kernel/kotd/HEAD.
Thanks for the correction.
> > I agree that they were much better than the current unwinder, > > also they didn't require slowing down the kernel with > > frame pointers. > > What it the reason this patch isn't mainline? It provides better traces, > doesn't slow down the kernel (which is important in our HPC envirement), so > what is the disadvantage?
The initial version that was merged had a few teething problems because it ran into tool chain bugs (which were quickly resolved). Unfortunately it lead to a few people developing irrational fears of dwarf2 in the process and it was reverted, annoying the original contributor. Right now someone would just need to retry the submission I guess.
-Andi
-- ak@linux.intel.com
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