On Fri, Jan 09, 2015 at 03:55:39PM +0100, 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 >
Is it just return probe? Did it work for normal kprobes? Maybe it's related to the below: https://lkml.org/lkml/2014/12/31/15 Have you check the acme/perf/urgent too? Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
