mm/page_alloc.c: print reserved_highatomic info

Print nr_reserved_highatomic in show_free_areas, because when alloc_harder
is false, this value will be subtracted from the free_pages in
__zone_watermark_ok.  Printing this value can help analyze memory
allocaction failure issues.

Link: http://lkml.kernel.org/r/19515f3de2fb6abe66b52e03e4b676a21e82beda.1573634806.git.lijiazi@xiaomi.com
Signed-off-by: lijiazi <lijiazi@xiaomi.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7c3bee1e98ec1464b2ad10f268bc21beedfdf63d..e3a69ba5ec533a2a727e745ac779176f1b4614c7 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5354,6 +5354,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
                        " min:%lukB"
                        " low:%lukB"
                        " high:%lukB"
+                       " reserved_highatomic:%luKB"
                        " active_anon:%lukB"
                        " inactive_anon:%lukB"
                        " active_file:%lukB"
@@ -5375,6 +5376,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
                        K(min_wmark_pages(zone)),
                        K(low_wmark_pages(zone)),
                        K(high_wmark_pages(zone)),
+                       K(zone->nr_reserved_highatomic),
                        K(zone_page_state(zone, NR_ZONE_ACTIVE_ANON)),
                        K(zone_page_state(zone, NR_ZONE_INACTIVE_ANON)),
                        K(zone_page_state(zone, NR_ZONE_ACTIVE_FILE)),