#systemtap on 2018-02-16 — irc logs at freenode.irclog.whitequark.org

2015-11-12 23:18 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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20:52 <eklitzke> are there supposed to be man pages for all of the systemtap probes?

20:52 <eklitzke> looks like my system (fedora 27) is missing a lot

20:52 <fche> so-so

20:53 <fche> man -k probe ... no individual man pages for the gajillion syscalls

20:53 <fche> stap -L the.probe.point gives you the vars there

21:01 <eklitzke> for instance, i want to read the manual for vfs.remove_from_page_cache

21:01 <eklitzke> oh i se

21:01 <eklitzke> the var names is probably sufficient

21:02 <fche> yeah, sorry, the vfs tapset probes ones don't seem to include the needed documentation directives

21:02 <fche> so don't get man pages

21:04 <eklitzke> what does the ! syntax mean in the probe declaration, e.g. https://paste.fedoraproject.org/paste/ZUdB56dO4MjYCOAnvEUyZA

21:05 <fche> [man stapprobes]

21:05 <fche> Alternately, a probe point may be followed by a "!" character, to indicate that it is

21:05 <fche> both optional and sufficient.

21:05 <eklitzke> i see, thanks

21:06 <fche> yeah we have this little bit of automation calculus thingie, in order to let us adapt to a wide range of configurations / versions

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