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>

1 files changed, 3 insertions, 2 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3d571df41c79..974162c80edb 100644
--- 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);
 }
 
 /*