[patch] vmstat: account page allocation failures

[Wu Fengguang]

Just for your reference.

It seems not necessary given that page allocation failure rate is no long high.

Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
 include/linux/mmzone.h |    1 +
 mm/page_alloc.c        |    2 ++
 mm/vmstat.c            |    1 +
 3 files changed, 4 insertions(+)

--- linux-next.orig/include/linux/mmzone.h	2011-04-28 21:34:30.000000000 +0800
+++ linux-next/include/linux/mmzone.h	2011-04-28 21:34:35.000000000 +0800
@@ -106,6 +106,7 @@ enum zone_stat_item {
 	NR_SHMEM,		/* shmem pages (included tmpfs/GEM pages) */
 	NR_DIRTIED,		/* page dirtyings since bootup */
 	NR_WRITTEN,		/* page writings since bootup */
+	NR_ALLOC_FAIL,
 #ifdef CONFIG_NUMA
 	NUMA_HIT,		/* allocated in intended node */
 	NUMA_MISS,		/* allocated in non intended node */
--- linux-next.orig/mm/page_alloc.c	2011-04-28 21:34:34.000000000 +0800
+++ linux-next/mm/page_alloc.c	2011-04-28 21:34:35.000000000 +0800
@@ -2165,6 +2165,8 @@ rebalance:
 	}
 
 nopage:
+	inc_zone_state(preferred_zone, NR_ALLOC_FAIL);
+	/* count_zone_vm_events(PGALLOCFAIL, preferred_zone, 1 << order); */
 	if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) {
 		unsigned int filter = SHOW_MEM_FILTER_NODES;
 
--- linux-next.orig/mm/vmstat.c	2011-04-28 21:34:30.000000000 +0800
+++ linux-next/mm/vmstat.c	2011-04-28 21:34:35.000000000 +0800
@@ -879,6 +879,7 @@ static const char * const vmstat_text[] 
 	"nr_shmem",
 	"nr_dirtied",
 	"nr_written",
+	"nr_alloc_fail",
 
 #ifdef CONFIG_NUMA
 	"numa_hit",
--
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