fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<eklitzke>
it looks like the vfs.do_mpage_readpage probe doesn't work on my system (fedora 27), nor does it work when i try to probe that kernel function manually
<fche>
eklitzke, pls consider opening a bug report about it, if you have time
<eklitzke>
ok, i will do that
<fche>
often it's just a renamed function in the kernel
<eklitzke>
strangely that doesn't appear to be the case, i wonder if it got optimized away somehow
<fche>
possible too
<eklitzke>
trying to figure out how to dump symbols from my kernel
<fche>
stap -l 'kernel.function("*glob*")'
<eklitzke>
thanks
<eklitzke>
ah it was PEBCAK, ext4 defines a specialized version of this
<eklitzke>
if I want to contribute changes to a tapset bundled with systemtap, is the right thing to do to send a patch to the mailing list?
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<zino_>
I've finally managed to crosscompile staprun for powerpc on an ancient system: the target runs linux 2.6.21
<zino_>
now I have to sort out the host part: if I understood correctly, I need to be able to compile systemtap scripts into ko modules
<zino_>
I'm at version 2.3 of systemtal (the environment uses elfutils 0.108 and I'm having troubles upgrading that)
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<eklitzke>
i upgraded my kernel today on fedora form 4.14 to 4.15, and it looks like a method changed in the kernel (init_timer became init_timers) and that breaks systemtap
<eklitzke>
should i report these kinds of errors in the systemtap bugzilla or the fedora bugzilla?
<fche>
I wonder if we should have a wiki page or something, teaching people how to help do such ports.
<eklitzke>
that would be nice
<eklitzke>
do you know how i can downgrade my kernel debuginfo? when i try to do "dnf debuginfo-install kernel-core-4.14.18-300.fc27.x86_64" it wants to install the debuginfo for 4.15.3-300.fc27 which is the one that's broken for me
<eklitzke>
nm found them on koji
<fche>
yeah, that's about all you can do at the moment
<fche>
before long, we'll have an http/docker widget that automatically downloads matching kernel/debuginfo for a remote client