1 files changed, 16 insertions, 0 deletions

diff --git a/modutils/Config.in b/modutils/Config.in
index d2a2e04d1..83c12b67f 100644
--- a/modutils/Config.in
+++ b/modutils/Config.in
@@ -121,6 +121,22 @@ config FEATURE_2_4_MODULES
           This increases size considerably. Say N unless you plan
           to run ancient kernels.
 
+config FEATURE_INSMOD_TRY_MMAP
+        bool "Try to load module from a mmap'ed area"
+        default n
+        depends on INSMOD || MODPROBE_SMALL
+        help
+          This option causes module loading code to try to mmap
+          module first. If it does not work (for example,
+          it does not work for compressed modules), module will be read
+          (and unpacked if needed) into a memory block allocated by malloc.
+
+          The only case when mmap works but malloc does not is when
+          you are trying to load a big module on a very memory-constrained
+          machine. Malloc will momentarily need 2x as much memory as mmap.
+
+          Choosing N saves about 250 bytes of code (on 32-bit x86).
+
 config FEATURE_INSMOD_VERSION_CHECKING
         bool "Enable module version checking"
         default n