From: lijiazi <jqqlijiazi@xxxxxxxxx> Subject: 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@xxxxxxxxxx Signed-off-by: lijiazi <lijiazi@xxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/page_alloc.c~mm-page_alloc-print-reserved_highatomic-info +++ a/mm/page_alloc.c @@ -5354,6 +5354,7 @@ void show_free_areas(unsigned int filter " 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 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)), _
