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Date: Tue, 7 Jul 2015 11:11:00 -0400 (EDT) From: Vince Weaver <vincent.weaver@...ne.edu> To: Vince Weaver <vincent.weaver@...ne.edu> cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, linux-kernel@...r.kernel.org, Ananth N Mavinakayanahalli <ananth@...ibm.com>, Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>, "David S. Miller" <davem@...emloft.net>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Steven Rostedt <rostedt@...dmis.org> Subject: Re: perf, kprobes: fuzzer generates huge number of WARNings On Tue, 7 Jul 2015, Vince Weaver wrote: > On Tue, 7 Jul 2015, Masami Hiramatsu wrote: > > > > It's a Hawell machine running 4.2-rc1. I can post the .config if it's of > > > interest. > > > > Yes, I'm interested in. > > I've put it here: > http://web.eece.maine.edu/~vweaver/junk/haswell-config > > > OK, and also, if you have a chance, please run the ftracetest as below. > > > > $ cd tools/testing/selftest/ftrace/ > > $ sudo ./ftracetest > > > > This will do a series of basic tests on ftrace and report it. > > It won't run: > sudo ./ftracetest > Error: No ftrace directory found > OK here are the results when I mounted debugfs in the right place. sudo ./ftracetest === Ftrace unit tests === [1] Basic trace file check [PASS] [2] Basic test for tracers [PASS] [3] Basic trace clock test [PASS] [4] Basic event tracing check [PASS] [5] event tracing - enable/disable with event level files [PASS] [6] event tracing - enable/disable with subsystem level files [PASS] [7] event tracing - enable/disable with top level files [PASS] [8] ftrace - function graph filters with stack tracer [UNSUPPORTED] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter-stack.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-filter-stack.tc + grep -q function_graph available_tracers + [ ! -f set_ftrace_filter ] + disable_tracing + echo 0 + clear_trace + echo + echo schedule + echo function_graph + [ ! -f stack_trace ] + echo Stack tracer not configured Stack tracer not configured + do_reset + reset_tracer + echo nop + [ -e /proc/sys/kernel/stack_tracer_enabled ] + enable_tracing + echo 1 + clear_trace + echo + echo + exit_unsupported + kill -s 40 2725 + exit 0 [9] ftrace - function graph filters [PASS] [10] ftrace - function profiler with function tracing [UNSUPPORTED] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/ftrace/func_profiler.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/ftrace/func_profiler.tc + grep -q function_graph available_tracers + [ ! -f set_ftrace_filter ] + [ ! -f function_profile_enabled ] + echo function_profile_enabled not found, function profiling enabled? function_profile_enabled not found, function profiling enabled? + exit_unsupported + kill -s 40 2725 + exit 0 [11] Kprobe dynamic event - adding and removing [FAIL] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc + [ -f kprobe_events ] + echo 0 + echo + echo p:myevent do_fork sh: echo: I/O error [12] Kprobe dynamic event - busy event check [FAIL] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc + [ -f kprobe_events ] + echo 0 + echo + echo p:myevent do_fork sh: echo: I/O error [13] Kprobe dynamic event with arguments [FAIL] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc + [ -f kprobe_events ] + echo 0 + echo + echo p:testprobe do_fork $stack $stack0 +0($stack) sh: echo: I/O error [14] Kprobe dynamic event with function tracer [FAIL] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc + [ -f kprobe_events ] + grep function available_tracers blk function_graph function nop + echo nop + echo do_fork sh: echo: I/O error [15] Kretprobe dynamic event with arguments [FAIL] execute: /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc + . /home/vince/research/linux-kernel/linux-git/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc + [ -f kprobe_events ] + echo 0 + echo + echo r:testprobe2 do_fork $retval sh: echo: I/O error # of passed: 8 # of failed: 5 # of unresolved: 0 # of untested: 0 # of unsupported: 2 # of xfailed: 0 # of undefined(test bug): 0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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