From: Liangcai Fan <liangcaifan19@xxxxxxxxx> Subject: mm/page_alloc.c: show watermark_boost of zone in zoneinfo min/low/high_wmark_pages(z) is defined as (z->_watermark[WMARK_MIN/LOW/HIGH] + z->watermark_boost). If kswapd is frequently waked up due to the increase of min/low/high_wmark_pages, printing watermark_boost can quickly locate whether watermark_boost or _watermark[WMARK_MIN/LOW/HIGH] caused min/low/high_wmark_pages to increase. Link: https://lkml.kernel.org/r/1632472566-12246-1-git-send-email-liangcaifan19@xxxxxxxxx Signed-off-by: Liangcai Fan <liangcaifan19@xxxxxxxxx> Cc: Chunyan Zhang <zhang.lyra@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 2 ++ mm/vmstat.c | 2 ++ 2 files changed, 4 insertions(+) --- a/mm/page_alloc.c~mm-show-watermark_boost-of-zone-in-zoneinfo +++ a/mm/page_alloc.c @@ -5993,6 +5993,7 @@ void show_free_areas(unsigned int filter printk(KERN_CONT "%s" " free:%lukB" + " boost:%lukB" " min:%lukB" " low:%lukB" " high:%lukB" @@ -6013,6 +6014,7 @@ void show_free_areas(unsigned int filter "\n", zone->name, K(zone_page_state(zone, NR_FREE_PAGES)), + K(zone->watermark_boost), K(min_wmark_pages(zone)), K(low_wmark_pages(zone)), K(high_wmark_pages(zone)), --- a/mm/vmstat.c~mm-show-watermark_boost-of-zone-in-zoneinfo +++ a/mm/vmstat.c @@ -1656,6 +1656,7 @@ static void zoneinfo_show_print(struct s } seq_printf(m, "\n pages free %lu" + "\n boost %lu" "\n min %lu" "\n low %lu" "\n high %lu" @@ -1664,6 +1665,7 @@ static void zoneinfo_show_print(struct s "\n managed %lu" "\n cma %lu", zone_page_state(zone, NR_FREE_PAGES), + zone->watermark_boost, min_wmark_pages(zone), low_wmark_pages(zone), high_wmark_pages(zone), _
