This version of the utrace-ftrace engine represents bringing v2 (as posted along with utrace two weeks ago) up to parity with the tip/tracing/syscalls one in terms of using the system call pretty-printing tables. This patch applies to the tip/tracing/syscalls tree, except that it assumes that utrace patches are also applied beforehand.
Next up could be adding an option to use the filterable TRACE_EVENT tracepoint engine instead of (or in addition to?) the hand-written trace record management & formatting. Next up could also be removal of the syscall-tracing prototype, if people are so inclined. Frank Ch. Eigler (2): make arch_init_ftrace_syscalls multiply callable utrace-based ftrace "process" engine, v3 arch/x86/kernel/ftrace.c | 3 + include/linux/processtrace.h | 51 ++++ kernel/trace/Kconfig | 8 + kernel/trace/Makefile | 1 + kernel/trace/trace.h | 9 + kernel/trace/trace_process.c | 642 ++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 714 insertions(+), 0 deletions(-) create mode 100644 include/linux/processtrace.h create mode 100644 kernel/trace/trace_process.c