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> that works
<fche> we take them in sourceware bz too
<eklitzke> yeah i guess you're cc'ed either way
<fche> yeah
<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
<fche> including from koji
<zino_> here my first go with cross stap: https://pastebin.com/FXFqwBDE
<zino_> any help?
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