[HELP] ubacktrace() problem

Frank Ch. Eigler fche@redhat.com
Wed Jan 13 15:23:00 GMT 2016


Hi -

> >  % rpm -ql kernel-debuginfo | grep vdso
> > /usr/lib/debug/lib/modules/4.2.6-200.fc22.x86_64/vdso
> > [...]
> > These may be necessary to be able to unwind through the kernel-user
> > transition [...]
> 
> Thanks for the information! The debian indeed lacks of vdso files in
> the kernel package.

Please let us know when/if a debian bug is opened, so we can track it.


> [...]  I am still wondering if the warnings denotes that the
> collected backtraces are not so accurate and complete.

Well, they will be as accurate and complete as systemtap can make it,
with the imperfect data it is given.  Use the warnings to help (us)
diagnose known problem cases, otherwise please don't worry about them.


- FChE



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