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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