kfence: allow use of a deferrable timer

[linux-block.git] / lib / Kconfig.kfence

diff --git a/lib/Kconfig.kfence b/lib/Kconfig.kfence
index 912f252a41fc63744b168ddb43dcd42aec07433e..459dda9ef619b872f8bdca63131a311a7ca601bd 100644 (file)
--- a/lib/Kconfig.kfence
+++ b/lib/Kconfig.kfence
@@ -45,6 +45,18 @@ config KFENCE_NUM_OBJECTS
          pages are required; with one containing the object and two adjacent
          ones used as guard pages.
 
+config KFENCE_DEFERRABLE
+       bool "Use a deferrable timer to trigger allocations"
+       help
+         Use a deferrable timer to trigger allocations. This avoids forcing
+         CPU wake-ups if the system is idle, at the risk of a less predictable
+         sample interval.
+
+         Warning: The KUnit test suite fails with this option enabled - due to
+         the unpredictability of the sample interval!
+
+         Say N if you are unsure.
+
 config KFENCE_STATIC_KEYS
        bool "Use static keys to set up allocations" if EXPERT
        depends on JUMP_LABEL