Hello, This patchset add 'function-fork' option to function tracer which makes pid filter to be inherited like 'event-fork' does. During the test, I found a bug of pid filter on an instance directory. The patch 1 fixes it and maybe it should go to the stable tree.
The function-fork option is disabled by default as event-fork does, but we might consider changing the default since it seems to be more natural from an user's perspective IMHO. v2 changes) * use ftrace_clear_pids() (Steve) * add Ack from Masami The code is also available at 'ftrace/function-fork-v2' branch on git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git Thanks, Namhyung Namhyung Kim (4): ftrace: Fix function pid filter on instances ftrace: Add 'function-fork' trace option selftests: ftrace: Add -l/--logdir option selftests: ftrace: Add a testcase for function PID filter kernel/trace/ftrace.c | 46 ++++++++++ kernel/trace/trace.c | 6 +- kernel/trace/trace.h | 8 +- tools/testing/selftests/ftrace/ftracetest | 5 ++ .../ftrace/test.d/ftrace/func-filter-pid.tc | 98 ++++++++++++++++++++++ 5 files changed, 161 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc -- 2.12.2
