Messages in this thread | | | Date | Fri, 09 Jan 2015 08:04:38 -0700 | From | David Ahern <> | Subject | Re: [BUG] perf probe can't insert return kprobe |
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On 1/9/15 7:55 AM, Jiri Olsa wrote: > hi, > I couldn't use following perf command to insert return probe: > > # perf probe -a fork_exit=do_fork%return > Added new event: > Failed to write event: Invalid argument > Error: Failed to add events. > > > I'm pretty sure I used this command before, so seems like > it's broken. I can still use debugfs tracing interface to > do that: > # echo 'r:do_fork_entry do_fork' > kprobe_events > > I used Arnaldo's latest perf/core and FC20 kernel: > > # uname -a > Linux krava 3.17.7-200.fc20.x86_64 #1 SMP Wed Dec 17 03:35:33 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux > # ./perf version > perf version 3.18.g6a7d78 >
If you want to bisect it the perf-probe command works for me on FC20, 3.17.7-200.fc20.x86_64 with perf from 3.12 (my local modified version is based on 3.12).
David
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