From: Andi Kleen <ak@suse.de>
Date: Fri, 28 Jul 2006 12:44:54 +0000 (+0200)
Subject: [PATCH] x86_64: Document backtracer selection options
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b783fd925cdd56d24d164e5bdcb072f2a67aedf4;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] x86_64: Document backtracer selection options

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 6887d44d2661..6da24e7a56cb 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