tracing: Dump either the oops's cpu source or all cpus buffers

[deliverable/linux.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e4cbca58536c9f3ab4236f4db78eb22cacc993af..ab67b33300fb6367926e9b0819c6fec73f442f48 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -789,8 +789,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        as early as possible in order to facilitate early
                        boot debugging.
 
-       ftrace_dump_on_oops
+       ftrace_dump_on_oops[=orig_cpu]
                        [FTRACE] will dump the trace buffers on oops.
+                       If no parameter is passed, ftrace will dump
+                       buffers of all CPUs, but if you pass orig_cpu, it will
+                       dump only the buffer of the CPU that triggered the
+                       oops.
 
        ftrace_filter=[function-list]
                        [FTRACE] Limit the functions traced by the function