1 files changed, 12 insertions, 0 deletions
diff --git a/Config.in b/Config.in
index b83beb52d..285fe0a19 100644
--- a/Config.in
+++ b/Config.in
@@ -264,6 +264,18 @@ config PAM
 	  Use PAM in some busybox applets (currently login and httpd) instead
 	  of direct access to password database.
 
+config FEATURE_USE_SENDFILE
+	bool "Use sendfile system call"
+	default y
+	help
+	  When enabled, busybox will use the kernel sendfile() function
+	  instead of read/write loops to copy data between file descriptors
+	  (for example, cp command does this a lot).
+	  If sendfile() doesn't work, copying code falls back to read/write
+	  loop. sendfile() was originally implemented for faster I/O
+	  from files to sockets, but since Linux 2.6.33 it was extended
+	  to work for many more file types.
+
 config LONG_OPTS
 	bool "Support for --long-options"
 	default y