cgroups: make messages more readable

Fix some cgroup messages to read better.
Update MAINTAINERS to include mm/*cgroup* files.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1544,6 +1544,7 @@ L:	containers@lists.linux-foundation.org
 S:	Maintained
 F:	include/linux/cgroup*
 F:	kernel/cgroup*
+F:	mm/*cgroup*
 
 CORETEMP HARDWARE MONITORING DRIVER
 P:	Rudolf Marek

mm/page_cgroup.c

@@ -83,12 +83,12 @@ void __init page_cgroup_init_flatmem(void)
 			goto fail;
 	}
 	printk(KERN_INFO "allocated %ld bytes of page_cgroup\n", total_usage);
-	printk(KERN_INFO "please try cgroup_disable=memory option if you"
-	" don't want\n");
+	printk(KERN_INFO "please try 'cgroup_disable=memory' option if you"
+	" don't want memory cgroups\n");
 	return;
 fail:
-	printk(KERN_CRIT "allocation of page_cgroup was failed.\n");
-	printk(KERN_CRIT "please try cgroup_disable=memory boot option\n");
+	printk(KERN_CRIT "allocation of page_cgroup failed.\n");
+	printk(KERN_CRIT "please try 'cgroup_disable=memory' boot option\n");
 	panic("Out of memory");
 }
 
@@ -252,14 +252,14 @@ void __init page_cgroup_init(void)
 		fail = init_section_page_cgroup(pfn);
 	}
 	if (fail) {
-		printk(KERN_CRIT "try cgroup_disable=memory boot option\n");
+		printk(KERN_CRIT "try 'cgroup_disable=memory' boot option\n");
 		panic("Out of memory");
 	} else {
 		hotplug_memory_notifier(page_cgroup_callback, 0);
 	}
 	printk(KERN_INFO "allocated %ld bytes of page_cgroup\n", total_usage);
-	printk(KERN_INFO "please try cgroup_disable=memory option if you don't"
-	" want\n");
+	printk(KERN_INFO "please try 'cgroup_disable=memory' option if you don't"
+	" want memory cgroups\n");
 }
 
 void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)