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-rw-r--r--Documentation/sysrq.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt
index afa2946892da..cf42b820ff9d 100644
--- a/Documentation/sysrq.txt
+++ b/Documentation/sysrq.txt
@@ -115,6 +115,8 @@ On all - write a character to /proc/sysrq-trigger. e.g.:
'x' - Used by xmon interface on ppc/powerpc platforms.
+'z' - Dump the ftrace buffer
+
'0'-'9' - Sets the console log level, controlling which kernel messages
will be printed to your console. ('0', for example would make
it so that only emergency messages like PANICs or OOPSes would