vmscan: add task name to warn_scan_unevictable() messages

If we need to know a usecase, caller program name is critical important.
Show it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
David Rientjes <rientjes@google.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3d571df41c7917be30ebba1457c4004ead710ee9..974162c80edb3d4fd6380d888b9fb2fb7df95d88 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3436,9 +3436,10 @@ void scan_mapping_unevictable_pages(struct address_space *mapping)
 static void warn_scan_unevictable_pages(void)
 {
        printk_once(KERN_WARNING
-                   "The scan_unevictable_pages sysctl/node-interface has been "
+                   "%s: The scan_unevictable_pages sysctl/node-interface has been "
                    "disabled for lack of a legitimate use case.  If you have "
-                   "one, please send an email to linux-mm@kvack.org.\n");
+                   "one, please send an email to linux-mm@kvack.org.\n",
+                   current->comm);
 }
 
 /*