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Message-Id: <1353254850-27336-3-git-send-email-jiang.liu@huawei.com>
Date: Mon, 19 Nov 2012 00:07:27 +0800
From: Jiang Liu <liuj97@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Wen Congyang <wency@...fujitsu.com>,
David Rientjes <rientjes@...gle.com>
Cc: Jiang Liu <jiang.liu@...wei.com>,
Maciej Rutecki <maciej.rutecki@...il.com>,
Chris Clayton <chris2553@...glemail.com>,
"Rafael J . Wysocki" <rjw@...k.pl>, Mel Gorman <mgorman@...e.de>,
Minchan Kim <minchan@...nel.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
Michal Hocko <mhocko@...e.cz>,
Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [RFT PATCH v1 2/5] mm: replace zone->present_pages with zone->managed_pages if appreciated
Now we have zone->managed_pages for "pages managed by the buddy system
in the zone", so replace zone->present_pages with zone->managed_pages
if what the user really wants is number of pages managed by the buddy
system.
Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
---
mm/mempolicy.c | 2 +-
mm/page_alloc.c | 32 ++++++++++++++++----------------
mm/vmscan.c | 16 ++++++++--------
mm/vmstat.c | 2 +-
4 files changed, 26 insertions(+), 26 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index d04a8a5..8367070 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -147,7 +147,7 @@ static int is_valid_nodemask(const nodemask_t *nodemask)
for (k = 0; k <= policy_zone; k++) {
z = &NODE_DATA(nd)->node_zones[k];
- if (z->present_pages > 0)
+ if (z->managed_pages > 0)
return 1;
}
}
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a41ee64..fe1cf48 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2791,7 +2791,7 @@ static unsigned int nr_free_zone_pages(int offset)
struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL);
for_each_zone_zonelist(zone, z, zonelist, offset) {
- unsigned long size = zone->present_pages;
+ unsigned long size = zone->managed_pages;
unsigned long high = high_wmark_pages(zone);
if (size > high)
sum += size - high;
@@ -2844,7 +2844,7 @@ void si_meminfo_node(struct sysinfo *val, int nid)
val->totalram = pgdat->node_present_pages;
val->freeram = node_page_state(nid, NR_FREE_PAGES);
#ifdef CONFIG_HIGHMEM
- val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].present_pages;
+ val->totalhigh = pgdat->node_zones[ZONE_HIGHMEM].managed_pages;
val->freehigh = zone_page_state(&pgdat->node_zones[ZONE_HIGHMEM],
NR_FREE_PAGES);
#else
@@ -3883,7 +3883,7 @@ static int __meminit zone_batchsize(struct zone *zone)
*
* OK, so we don't know how big the cache is. So guess.
*/
- batch = zone->present_pages / 1024;
+ batch = zone->managed_pages / 1024;
if (batch * PAGE_SIZE > 512 * 1024)
batch = (512 * 1024) / PAGE_SIZE;
batch /= 4; /* We effectively *= 4 below */
@@ -3967,7 +3967,7 @@ static void __meminit setup_zone_pageset(struct zone *zone)
if (percpu_pagelist_fraction)
setup_pagelist_highmark(pcp,
- (zone->present_pages /
+ (zone->managed_pages /
percpu_pagelist_fraction));
}
}
@@ -5077,8 +5077,8 @@ static void calculate_totalreserve_pages(void)
/* we treat the high watermark as reserved pages. */
max += high_wmark_pages(zone);
- if (max > zone->present_pages)
- max = zone->present_pages;
+ if (max > zone->managed_pages)
+ max = zone->managed_pages;
reserve_pages += max;
/*
* Lowmem reserves are not available to
@@ -5110,7 +5110,7 @@ static void setup_per_zone_lowmem_reserve(void)
for_each_online_pgdat(pgdat) {
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
- unsigned long present_pages = zone->present_pages;
+ unsigned long managed_pages = zone->managed_pages;
zone->lowmem_reserve[j] = 0;
@@ -5124,9 +5124,9 @@ static void setup_per_zone_lowmem_reserve(void)
sysctl_lowmem_reserve_ratio[idx] = 1;
lower_zone = pgdat->node_zones + idx;
- lower_zone->lowmem_reserve[j] = present_pages /
+ lower_zone->lowmem_reserve[j] = managed_pages /
sysctl_lowmem_reserve_ratio[idx];
- present_pages += lower_zone->present_pages;
+ managed_pages += lower_zone->managed_pages;
}
}
}
@@ -5145,14 +5145,14 @@ static void __setup_per_zone_wmarks(void)
/* Calculate total number of !ZONE_HIGHMEM pages */
for_each_zone(zone) {
if (!is_highmem(zone))
- lowmem_pages += zone->present_pages;
+ lowmem_pages += zone->managed_pages;
}
for_each_zone(zone) {
u64 tmp;
spin_lock_irqsave(&zone->lock, flags);
- tmp = (u64)pages_min * zone->present_pages;
+ tmp = (u64)pages_min * zone->managed_pages;
do_div(tmp, lowmem_pages);
if (is_highmem(zone)) {
/*
@@ -5166,7 +5166,7 @@ static void __setup_per_zone_wmarks(void)
*/
int min_pages;
- min_pages = zone->present_pages / 1024;
+ min_pages = zone->managed_pages / 1024;
if (min_pages < SWAP_CLUSTER_MAX)
min_pages = SWAP_CLUSTER_MAX;
if (min_pages > 128)
@@ -5235,7 +5235,7 @@ static void __meminit calculate_zone_inactive_ratio(struct zone *zone)
unsigned int gb, ratio;
/* Zone size in gigabytes */
- gb = zone->present_pages >> (30 - PAGE_SHIFT);
+ gb = zone->managed_pages >> (30 - PAGE_SHIFT);
if (gb)
ratio = int_sqrt(10 * gb);
else
@@ -5321,7 +5321,7 @@ int sysctl_min_unmapped_ratio_sysctl_handler(ctl_table *table, int write,
return rc;
for_each_zone(zone)
- zone->min_unmapped_pages = (zone->present_pages *
+ zone->min_unmapped_pages = (zone->managed_pages *
sysctl_min_unmapped_ratio) / 100;
return 0;
}
@@ -5337,7 +5337,7 @@ int sysctl_min_slab_ratio_sysctl_handler(ctl_table *table, int write,
return rc;
for_each_zone(zone)
- zone->min_slab_pages = (zone->present_pages *
+ zone->min_slab_pages = (zone->managed_pages *
sysctl_min_slab_ratio) / 100;
return 0;
}
@@ -5379,7 +5379,7 @@ int percpu_pagelist_fraction_sysctl_handler(ctl_table *table, int write,
for_each_populated_zone(zone) {
for_each_possible_cpu(cpu) {
unsigned long high;
- high = zone->present_pages / percpu_pagelist_fraction;
+ high = zone->managed_pages / percpu_pagelist_fraction;
setup_pagelist_highmark(
per_cpu_ptr(zone->pageset, cpu), high);
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 48550c6..7240e89 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1935,7 +1935,7 @@ static inline bool compaction_ready(struct zone *zone, struct scan_control *sc)
* a reasonable chance of completing and allocating the page
*/
balance_gap = min(low_wmark_pages(zone),
- (zone->present_pages + KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
+ (zone->managed_pages + KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
KSWAPD_ZONE_BALANCE_GAP_RATIO);
watermark = high_wmark_pages(zone) + balance_gap + (2UL << sc->order);
watermark_ok = zone_watermark_ok_safe(zone, 0, watermark, 0, 0);
@@ -2416,14 +2416,14 @@ static void age_active_anon(struct zone *zone, struct scan_control *sc)
static bool pgdat_balanced(pg_data_t *pgdat, unsigned long balanced_pages,
int classzone_idx)
{
- unsigned long present_pages = 0;
+ unsigned long managed_pages = 0;
int i;
for (i = 0; i <= classzone_idx; i++)
- present_pages += pgdat->node_zones[i].present_pages;
+ managed_pages += pgdat->node_zones[i].managed_pages;
/* A special case here: if zone has no page, we think it's balanced */
- return balanced_pages >= (present_pages >> 2);
+ return balanced_pages >= (managed_pages >> 2);
}
/*
@@ -2471,7 +2471,7 @@ static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, long remaining,
* is to sleep
*/
if (zone->all_unreclaimable) {
- balanced += zone->present_pages;
+ balanced += zone->managed_pages;
continue;
}
@@ -2479,7 +2479,7 @@ static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, long remaining,
i, 0))
all_zones_ok = false;
else
- balanced += zone->present_pages;
+ balanced += zone->managed_pages;
}
/*
@@ -2645,7 +2645,7 @@ loop_again:
* of the zone, whichever is smaller.
*/
balance_gap = min(low_wmark_pages(zone),
- (zone->present_pages +
+ (zone->managed_pages +
KSWAPD_ZONE_BALANCE_GAP_RATIO-1) /
KSWAPD_ZONE_BALANCE_GAP_RATIO);
/*
@@ -2712,7 +2712,7 @@ loop_again:
*/
zone_clear_flag(zone, ZONE_CONGESTED);
if (i <= *classzone_idx)
- balanced += zone->present_pages;
+ balanced += zone->managed_pages;
}
}
diff --git a/mm/vmstat.c b/mm/vmstat.c
index e47d31c..b2925d1 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -142,7 +142,7 @@ int calculate_normal_threshold(struct zone *zone)
* 125 1024 10 16-32 GB 9
*/
- mem = zone->present_pages >> (27 - PAGE_SHIFT);
+ mem = zone->managed_pages >> (27 - PAGE_SHIFT);
threshold = 2 * fls(num_online_cpus()) * (1 + fls(mem));
--
1.7.9.5
--
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