sched: latencytop support

LatencyTOP kernel infrastructure; it measures latencies in the
scheduler and tracks it system wide and per process.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a60109307d32..14fb355e3caa 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -517,4 +517,18 @@ config FAULT_INJECTION_STACKTRACE_FILTER
         help
           Provide stacktrace filter for fault-injection capabilities
 
+config LATENCYTOP
+        bool "Latency measuring infrastructure"
+        select FRAME_POINTER if !MIPS
+        select KALLSYMS
+        select KALLSYMS_ALL
+        select STACKTRACE
+        select SCHEDSTATS
+        select SCHED_DEBUG
+        depends on X86 || X86_64
+        help
+          Enable this option if you want to use the LatencyTOP tool
+          to find out which userspace is blocking on what kernel operations.
+
+
 source "samples/Kconfig"