[PATCH for review] [36/145] x86_64: Document backtracer selection options

[Andi Kleen]

r
Signed-off-by: Andi Kleen <ak@xxxxxxx>

---
 Documentation/x86_64/boot-options.txt |    7 +++++++
 1 files changed, 7 insertions(+)

Index: linux/Documentation/x86_64/boot-options.txt
===================================================================
--- linux.orig/Documentation/x86_64/boot-options.txt
+++ linux/Documentation/x86_64/boot-options.txt
@@ -245,6 +245,13 @@ Debugging
 		newfallback: use new unwinder but fall back to old if it gets
 			stuck (default)
 
+  call_trace=[old|both|newfallback|new]
+		old: use old inexact backtracer
+		new: use new exact dwarf2 unwinder
+ 		both: print entries from both
+		newfallback: use new unwinder but fall back to old if it gets
+			stuck (default)
+
 Misc
 
   noreplacement  Don't replace instructions with more appropriate ones
-
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