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* [patch 101/158] mm/page_alloc.c: print reserved_highatomic info
@ 2019-12-01  1:55 akpm
  0 siblings, 0 replies; only message in thread
From: akpm @ 2019-12-01  1:55 UTC (permalink / raw)
  To: akpm, jqqlijiazi, lijiazi, linux-mm, mgorman, mm-commits, torvalds

From: lijiazi <jqqlijiazi@gmail.com>
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@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>
---

 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)),
_


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2019-12-01  1:55 [patch 101/158] mm/page_alloc.c: print reserved_highatomic info akpm

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