X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=Documentation%2Fx86_64%2Fboot-options.txt;h=6da24e7a56cba01c9b7af0a0e1c894667a614d75;hb=7d2d8259a2a3078c629b6ee9d4a7ae3ef74ac100;hp=6887d44d266188c9d5d17fc267b2441cc82d8e39;hpb=5f2f444136abdb13dbd2094555aa65fc252aef6c;p=linux-2.6-omap-h63xx.git

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 6887d44d266..6da24e7a56c 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -238,6 +238,13 @@ Debugging
   pagefaulttrace Dump all page faults. Only useful for extreme debugging
 		and will create a lot of output.
 
+  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