Messages in this thread | | | Subject | Re: [BUG] ftrace: available_filter_functions empty after unloading module | From | Steven Rostedt <> | Date | Thu, 13 Dec 2012 14:39:29 -0500 |
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On Thu, 2012-12-13 at 08:34 -0500, Steven Rostedt wrote: > On Mon, 2012-12-10 at 12:45 +0100, Piotr Haber wrote: > > > > So you unloaded a module that you were tracing, correct? Hmm, the > > > warning that you hit was an accounting error. The accounting of what > > > functions are traced and what isn't. For some reason it tried to disable > > > a function that wasn't being traced. > > Yes, it happens when i unload a module that i traced before > > > > > Can you easily reproduce this? If so, can you give my your .config and > > > the steps you used to trigger it. > > Not 100% but it happens often enough to be annoying > > Attached is the config > > As for reproduction, i load the brcmsmac module, add all it symbols to > > set_ftrace_filter, associate with AP and unload the module > > nothing fancy, i use 'function' tracer > > Thanks, I'll see if I can reproduce it.
Can you tell me exactly what steps you took too?
Did you start function tracing before loading the module?
For example, did you do something like:
echo function > current_tracer modprobe brcmsmac echo :mod:brcmsmac > set_ftrace_filter echo 0 > tracing_on rmmod brcmsmac
??
Thanks,
-- Steve
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