Index: linux-2.6.21-rc7-mm1/Documentation/vm/slabinfo.c
===================================================================
--- linux-2.6.21-rc7-mm1.orig/Documentation/vm/slabinfo.c	2007-04-25 12:46:18.000000000 -0700
+++ linux-2.6.21-rc7-mm1/Documentation/vm/slabinfo.c	2007-04-25 12:46:24.000000000 -0700
@@ -26,6 +26,7 @@ int skip_zero = 1;
 int show_numa = 0;
 int show_track = 0;
 int validate = 0;
+int shrink = 0;
 
 int page_size;
 
@@ -47,7 +48,7 @@ void usage(void)
 		"-a|--aliases           Show aliases\n"
 		"-h|--help              Show usage information\n"
 		"-n|--numa              Show NUMA information\n"
-		"-p|--parameters        Show global parameters\n"
+		"-r|--reduce	        Shrink slabs\n"
 		"-v|--validate          Validate slabs\n"
 		"-t|--tracking          Show alloc/free information\n"
 		"-s|--slabs             Show slabs\n"
@@ -170,6 +171,11 @@ void slab_validate(char *name)
 	set_obj("validate", 1);
 }
 
+void slab_shrink(char *name)
+{
+	set_obj("shrink", 1);
+}
+
 int line = 0;
 
 void first_line(void)
@@ -296,6 +302,7 @@ struct option opts[] = {
 	{ "zero", 0, NULL, 'z' },
 	{ "help", 0, NULL, 'h' },
 	{ "validate", 0, NULL, 'v' },
+	{ "reduce", 0, NULL, 'r' },
 	{ "track", 0, NULL, 't'},
 	{ NULL, 0, NULL, 0 }
 };
@@ -332,6 +339,9 @@ int main(int argc, char *argv[])
 		case 't':
 			show_track = 1;
 			break;
+		case 'r':
+			shrink = 1;
+			break;
 		case 'v':
 			validate = 1;
 			break;
@@ -345,7 +355,7 @@ int main(int argc, char *argv[])
 	}
 
 	if (!show_slab && !show_alias && !show_parameters && !show_track
-		&& !validate)
+		&& !validate && !shrink)
 			show_slab = 1;
 
 	if (argc > optind)
@@ -380,6 +390,9 @@ int main(int argc, char *argv[])
 		   	if (validate)
 				slab_validate(de->d_name);
 			else
+			if (shrink)
+				slab_shrink(de->d_name);
+			else
 				slab(de->d_name);
 			chdir("..");
 			break;