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This release cycle is rather small. Just a few fixes to tracing.

Browse source 
The big change is the addition of the hwlat tracer. It not only detects
 SMIs, but also other latency that's caused by the hardware. I have detected
 some latency from large boxes having bus contention.
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Merge tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "This release cycle is rather small.  Just a few fixes to tracing.

  The big change is the addition of the hwlat tracer. It not only
  detects SMIs, but also other latency that's caused by the hardware. I
  have detected some latency from large boxes having bus contention"

* tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Call traceoff trigger after event is recorded
  ftrace/scripts: Add helper script to bisect function tracing problem functions
  tracing: Have max_latency be defined for HWLAT_TRACER as well
  tracing: Add NMI tracing in hwlat detector
  tracing: Have hwlat trace migrate across tracing_cpumask CPUs
  tracing: Add documentation for hwlat_detector tracer
  tracing: Added hardware latency tracer
  ftrace: Access ret_stack->subtime only in the function profiler
  function_graph: Handle TRACE_BPUTS in print_graph_comment
  tracing/uprobe: Drop isdigit() check in create_trace_uprobe
This commit is contained in:
Linus Torvalds 2016-10-06 11:48:41 -07:00
commit 95107b30be
17 changed files with 1013 additions and 20 deletions
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4
arch/sh/kernel/ftrace.c
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@ -139,7 +139,7 @@ static void ftrace_mod_code(void)
clear_mod_flag();
}
void ftrace_nmi_enter(void)
void arch_ftrace_nmi_enter(void)
{
if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) {
smp_rmb();
@ -150,7 +150,7 @@ void ftrace_nmi_enter(void)
smp_mb();
}
void ftrace_nmi_exit(void)
void arch_ftrace_nmi_exit(void)
{
/* Finish all executions before clearing nmi_running */
smp_mb();