1 files changed, 15 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 929adf6cb6b4..35518243c4bd 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -488,6 +488,21 @@ config RCU_BOOST_DELAY
 
           Accept the default if unsure.
 
+config SRCU_SYNCHRONIZE_DELAY
+        int "Microseconds to delay before waiting for readers"
+        range 0 20
+        default 10
+        help
+          This option controls how long SRCU delays before entering its
+          loop waiting on SRCU readers.  The purpose of this loop is
+          to avoid the unconditional context-switch penalty that would
+          otherwise be incurred if there was an active SRCU reader,
+          in a manner similar to adaptive locking schemes.  This should
+          be set to be a bit longer than the common-case SRCU read-side
+          critical-section overhead.
+
+          Accept the default if unsure.
+
 endmenu # "RCU Subsystem"
 
 config IKCONFIG