kernel-ark/kernel/trace
Steven Rostedt 60a7ecf426 ftrace: add quick function trace stop
Impact: quick start and stop of function tracer

This patch adds a way to disable the function tracer quickly without
the need to run kstop_machine. It adds a new variable called
function_trace_stop which will stop the calls to functions from mcount
when set.  This is just an on/off switch and does not handle recursion
like preempt_disable().

It's main purpose is to help other tracers/debuggers start and stop tracing
fuctions without the need to call kstop_machine.

The config option HAVE_FUNCTION_TRACE_MCOUNT_TEST is added for archs
that implement the testing of the function_trace_stop in the mcount
arch dependent code. Otherwise, the test is done in the C code.

x86 is the only arch at the moment that supports this.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06 07:50:51 +01:00
..
ftrace.c ftrace: add quick function trace stop 2008-11-06 07:50:51 +01:00
Kconfig ftrace: add quick function trace stop 2008-11-06 07:50:51 +01:00
Makefile ftrace: rename FTRACE to FUNCTION_TRACER 2008-10-20 18:27:03 +02:00
ring_buffer.c ftrace: insert in the ftrace_preempt_disable()/enable() functions 2008-11-04 10:09:49 +01:00
trace_boot.c tracing/ftrace: fix a bug when switch current tracer to sched tracer 2008-11-04 17:14:08 +01:00
trace_functions.c ftrace: rename the ftrace tracer to function 2008-10-20 18:27:04 +02:00
trace_irqsoff.c ftrace: rename FTRACE to FUNCTION_TRACER 2008-10-20 18:27:03 +02:00
trace_mmiotrace.c ftrace: preempt disable over interrupt disable 2008-10-14 10:39:09 +02:00
trace_nop.c ftrace: make work with new ring buffer 2008-10-14 10:38:57 +02:00
trace_sched_switch.c tracing/ftrace: fix a bug when switch current tracer to sched tracer 2008-11-04 17:14:08 +01:00
trace_sched_wakeup.c ftrace: insert in the ftrace_preempt_disable()/enable() functions 2008-11-04 10:09:49 +01:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_selftest.c ftrace: remove daemon 2008-10-23 16:00:22 +02:00
trace_stack.c ftrace: insert in the ftrace_preempt_disable()/enable() functions 2008-11-04 10:09:49 +01:00
trace_sysprof.c ftrace: make work with new ring buffer 2008-10-14 10:38:57 +02:00
trace.c Merge branch 'tracing/fastboot' into tracing/ftrace 2008-11-06 07:43:47 +01:00
trace.h Merge branch 'tracing/fastboot' into tracing/ftrace 2008-11-06 07:43:47 +01:00