[PATCH 4.14 084/109] mm: dont show nr_indirectly_reclaimable in /proc/vmstat

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roman Gushchin <guro@xxxxxx>

commit 7aaf7727235870f497eb928f728f7773d6df3b40 upstream.

Don't show nr_indirectly_reclaimable in /proc/vmstat, because there is
no need to export this vm counter to userspace, and some changes are
expected in reclaimable object accounting, which can alter this counter.

Link: http://lkml.kernel.org/r/20180425191422.9159-1-guro@xxxxxx
Signed-off-by: Roman Gushchin <guro@xxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 mm/vmstat.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1090,7 +1090,7 @@ const char * const vmstat_text[] = {
 	"nr_vmscan_immediate_reclaim",
 	"nr_dirtied",
 	"nr_written",
-	"nr_indirectly_reclaimable",
+	"", /* nr_indirectly_reclaimable */
 
 	/* enum writeback_stat_item counters */
 	"nr_dirty_threshold",
@@ -1673,6 +1673,10 @@ static int vmstat_show(struct seq_file *
 	unsigned long *l = arg;
 	unsigned long off = l - (unsigned long *)m->private;
 
+	/* Skip hidden vmstat items. */
+	if (*vmstat_text[off] == '\0')
+		return 0;
+
 	seq_puts(m, vmstat_text[off]);
 	seq_put_decimal_ull(m, " ", *l);
 	seq_putc(m, '\n');