mm: oom analysis: add per-zone statistics to show_free_areas()

show_free_areas() displays only a limited amount of zone counters.  This
patch includes additional counters in the display to allow easier
debugging.  This may be especially useful if an OOM is due to running out
of DMA memory.

Signed-off-by: KOSAKI Motohiro <[email protected]>
Reviewed-by: Christoph Lameter <[email protected]>
Acked-by: Wu Fengguang <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bdf12f36bae0019137f6504c84c7a5cbe612b9e8..8fbf5a4f5cf7a46b58bc0d3a50546ceeef1310c2 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2170,6 +2170,16 @@ void show_free_areas(void)
                        " inactive_file:%lukB"
                        " unevictable:%lukB"
                        " present:%lukB"
+                       " mlocked:%lukB"
+                       " dirty:%lukB"
+                       " writeback:%lukB"
+                       " mapped:%lukB"
+                       " slab_reclaimable:%lukB"
+                       " slab_unreclaimable:%lukB"
+                       " pagetables:%lukB"
+                       " unstable:%lukB"
+                       " bounce:%lukB"
+                       " writeback_tmp:%lukB"
                        " pages_scanned:%lu"
                        " all_unreclaimable? %s"
                        "\n",
@@ -2184,6 +2194,16 @@ void show_free_areas(void)
                        K(zone_page_state(zone, NR_INACTIVE_FILE)),
                        K(zone_page_state(zone, NR_UNEVICTABLE)),
                        K(zone->present_pages),
+                       K(zone_page_state(zone, NR_MLOCK)),
+                       K(zone_page_state(zone, NR_FILE_DIRTY)),
+                       K(zone_page_state(zone, NR_WRITEBACK)),
+                       K(zone_page_state(zone, NR_FILE_MAPPED)),
+                       K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)),
+                       K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)),
+                       K(zone_page_state(zone, NR_PAGETABLE)),
+                       K(zone_page_state(zone, NR_UNSTABLE_NFS)),
+                       K(zone_page_state(zone, NR_BOUNCE)),
+                       K(zone_page_state(zone, NR_WRITEBACK_TEMP)),
                        zone->pages_scanned,
                        (zone_is_all_unreclaimable(zone) ? "yes" : "no")
                        );