---
 free.1         |    6 ++++++
 free.c         |    7 ++++++-
 proc/sysinfo.c |    4 ++++
 vmstat.c       |    6 +++++-
 4 files changed, 21 insertions(+), 2 deletions(-)

--- free.1
+++ free.1	2019-12-11 06:20:16.659772479 +0000
@@ -100,6 +100,12 @@ Switch to the wide mode. The wide mode p
 than 80 characters. In this mode \fBbuffers\fR and \fBcache\fR
 are reported in two separate columns.
 .TP
+\fB\-C\fR, \fB\-\-full\-cache\fR
+Add to the plain \fBCached\fR in-memory cache for files also more cache lines as
+the \fBNFS_Unstable\fR pages sent to the server, but not yet committed to stable storage
+and the \fBSwapCached\fR memory that once was swapped out but is swapped back.
+Can be also enabled by the environment variable \fBPS_FULL_CACHE\fR.
+.TP
 \fB\-c\fR, \fB\-\-count\fR \fIcount\fR
 Display the result
 .I count
--- free.c
+++ free.c	2019-12-11 06:20:16.659772479 +0000
@@ -90,6 +90,7 @@ static void __attribute__ ((__noreturn__
 	fputs(_(" -t, --total         show total for RAM + swap\n"), out);
 	fputs(_(" -s N, --seconds N   repeat printing every N seconds\n"), out);
 	fputs(_(" -c N, --count N     repeat printing N times, then exit\n"), out);
+	fputs(_(" -C, --full-cache    add further cache lines to main cache\n"), out);
 	fputs(_(" -w, --wide          wide output\n"), out);
 	fputs(USAGE_SEPARATOR, out);
 	fputs(_("     --help     display this help and exit\n"), out);
@@ -231,6 +232,7 @@ int main(int argc, char **argv)
 		{  "total",	no_argument,	    NULL,  't'		},
 		{  "seconds",	required_argument,  NULL,  's'		},
 		{  "count",	required_argument,  NULL,  'c'		},
+		{  "full-cache",required_argument,  NULL,  HELP_OPTION	},
 		{  "wide",	no_argument,	    NULL,  'w'		},
 		{  "help",	no_argument,	    NULL,  HELP_OPTION	},
 		{  "version",	no_argument,	    NULL,  'V'		},
@@ -250,7 +252,7 @@ int main(int argc, char **argv)
 	textdomain(PACKAGE);
 	atexit(close_stdout);
 
-	while ((c = getopt_long(argc, argv, "bkmghltc:ws:V", longopts, NULL)) != -1)
+	while ((c = getopt_long(argc, argv, "bkmghltCc:ws:V", longopts, NULL)) != -1)
 		switch (c) {
 		case 'b':
 		        check_unit_set(&unit_set);
@@ -333,6 +335,9 @@ int main(int argc, char **argv)
 		case 'w':
 			flags |= FREE_WIDE;
 			break;
+		case 'C':
+			setenv("PS_FULL_CACHE", "yes", 1);
+			break;
 		case HELP_OPTION:
 			usage(stdout);
 		case 'V':
--- proc/sysinfo.c
+++ proc/sysinfo.c	2019-12-11 06:20:16.659772479 +0000
@@ -3,6 +3,7 @@
  * Copyright (C) 1992-1998 by Michael K. Johnson, johnsonm@redhat.com
  * Copyright 1998-2003 Albert Cahalan
  * June 2003, Fabian Frederick, disk and slab info
+ * Copyright (c) 2008 Bart Van Assche.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -700,6 +701,7 @@ void meminfo(void){
   int linux_version_code = procps_linux_version();
   mem_table_struct findme = { namebuf, NULL};
   mem_table_struct *found;
+  const char *ev;
   char *head;
   char *tail;
   static const mem_table_struct mem_table[] = {
@@ -779,6 +781,8 @@ nextline:
     kb_inactive = kb_inact_dirty + kb_inact_clean + kb_inact_laundry;
   }
   kb_main_cached = kb_page_cache + kb_slab_reclaimable;
+  if ((ev=getenv("PS_FULL_CACHE")))
+    kb_main_cached += kb_swap_cached + kb_nfs_unstable;
   kb_swap_used = kb_swap_total - kb_swap_free;
 
   /* if kb_main_available is greater than kb_main_total or our calculation of
--- vmstat.c
+++ vmstat.c	2019-12-11 06:22:44.716984764 +0000
@@ -103,6 +103,7 @@ static void __attribute__ ((__noreturn__
 	fputs(_(" -p, --partition <dev>  partition specific statistics\n"), out);
 	fputs(_(" -S, --unit <char>      define display unit\n"), out);
 	fputs(_(" -w, --wide             wide output\n"), out);
+	fputs(_(" -C, --full-cache       add further cache lines to main cache\n"), out);
 	fputs(_(" -t, --timestamp        show timestamp\n"), out);
 	fputs(USAGE_SEPARATOR, out);
 	fputs(USAGE_HELP, out);
@@ -899,7 +900,7 @@ int main(int argc, char *argv[])
 	atexit(close_stdout);
 
 	while ((c =
-		getopt_long(argc, argv, "afmnsdDp:S:wthV", longopts,
+		getopt_long(argc, argv, "aCfmnsdDp:S:wthV", longopts,
 			    NULL)) != -1)
 		switch (c) {
 		case 'V':
@@ -968,6 +969,9 @@ int main(int argc, char *argv[])
 		case 't':
 			t_option = 1;
 			break;
+		case 'C':
+			setenv("PS_FULL_CACHE", "yes", 1);
+			break;
 		default:
 			/* no other aguments defined yet. */
 			usage(stderr);