1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8ccbf27aead4..5abc09a93bc2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -320,6 +320,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         on: enable for both 32- and 64-bit processes
                         off: disable for both 32- and 64-bit processes
 
+        alloc_snapshot  [FTRACE]
+                        Allocate the ftrace snapshot buffer on boot up when the
+                        main buffer is allocated. This is handy if debugging
+                        and you need to use tracing_snapshot() on boot up, and
+                        do not want to use tracing_snapshot_alloc() as it needs
+                        to be done where GFP_KERNEL allocations are allowed.
+
         amd_iommu=      [HW,X86-64]
                         Pass parameters to the AMD IOMMU driver in the system.
                         Possible values are: