top: TOPMEM feature - 's(how sizes)' command. +2.5k when enabled,
+80 bytes when disabled (mainly because of text wrapping fixes
in display_process_list).

diff --git a/procps/Config.in b/procps/Config.in
index f041b5d..2bd3cd2 100644
--- a/procps/Config.in
+++ b/procps/Config.in
@@ -128,6 +128,13 @@
 	help
 	  Show 1/10th of a percent in CPU/mem statistics.
 
+config FEATURE_TOPMEM
+	bool "topmem"
+	default n
+	depends on TOP
+	help
+	  Enable 's' in top (gives lots of memory info)
+
 config UPTIME
 	bool "uptime"
 	default n