[PATCH 2/3] mm: rename nr_free_buffer_pages to nr_free_buffer_high_pages

From: Zhang Yanfei
Date: Tue Feb 05 2013 - 12:13:42 EST

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From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>

This function actually counts RAM pages that are above high watermark within
ZONE_DMA and ZONE_NORMAL, so rename it to a reasonable name.

Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
arch/ia64/mm/contig.c | 3 ++-
arch/ia64/mm/discontig.c | 3 ++-
drivers/mmc/card/mmc_test.c | 4 ++--
fs/buffer.c | 2 +-
fs/nfsd/nfs4state.c | 2 +-
fs/nfsd/nfssvc.c | 2 +-
include/linux/swap.h | 2 +-
mm/huge_memory.c | 2 +-
mm/page-writeback.c | 2 +-
mm/page_alloc.c | 9 +++++----
net/9p/trans_virtio.c | 2 +-
net/ipv4/tcp.c | 4 ++--
net/ipv4/udp.c | 2 +-
net/netfilter/ipvs/ip_vs_ctl.c | 2 +-
net/sctp/protocol.c | 2 +-
15 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 1516d1d..a2f45ce 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -93,7 +93,8 @@ void show_mem(unsigned int filter)
printk(KERN_INFO "%d pages swap cached\n", total_cached);
printk(KERN_INFO "Total of %ld pages in page table cache\n",
quicklist_total_size());
- printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
+ printk(KERN_INFO "%d free buffer pages above high watermark\n",
+ nr_free_buffer_high_pages());
}

diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index c641333..cc55453 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -666,7 +666,8 @@ void show_mem(unsigned int filter)
printk(KERN_INFO "%d pages swap cached\n", total_cached);
printk(KERN_INFO "Total of %ld pages in page table cache\n",
quicklist_total_size());
- printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
+ printk(KERN_INFO "%d free buffer pages above high watermark\n",
+ nr_free_buffer_pages());
}

/**
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 759714e..8271d4d 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -16,7 +16,7 @@
#include <linux/slab.h>

#include <linux/scatterlist.h>
-#include <linux/swap.h> /* For nr_free_buffer_pages() */
+#include <linux/swap.h> /* For nr_free_buffer_high_pages() */
#include <linux/list.h>

#include <linux/debugfs.h>
@@ -323,7 +323,7 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
unsigned long min_page_cnt = DIV_ROUND_UP(min_sz, PAGE_SIZE);
unsigned long max_seg_page_cnt = DIV_ROUND_UP(max_seg_sz, PAGE_SIZE);
unsigned long page_cnt = 0;
- unsigned long limit = nr_free_buffer_pages() >> 4;
+ unsigned long limit = nr_free_buffer_high_pages() >> 4;
struct mmc_test_mem *mem;

if (max_page_cnt > limit)
diff --git a/fs/buffer.c b/fs/buffer.c
index 7a75c3e..c1bcb6d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3354,7 +3354,7 @@ void __init buffer_init(void)
/*
* Limit the bh occupancy to 10% of ZONE_NORMAL
*/
- nrpages = (nr_free_buffer_pages() * 10) / 100;
+ nrpages = (nr_free_buffer_high_pages() * 10) / 100;
max_buffer_heads = nrpages * (PAGE_SIZE / sizeof(struct buffer_head));
hotcpu_notifier(buffer_cpu_notify, 0);
}
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index ac8ed96..cddd447 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4813,7 +4813,7 @@ set_max_delegations(void)
* is for a different inode), a delegation could take about 1.5K,
* giving a worst case usage of about 6% of memory.
*/
- max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
+ max_delegations = nr_free_buffer_high_pages() >> (20 - 2 - PAGE_SHIFT);
}

static int nfs4_state_create_net(struct net *net)
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index cee62ab..2820409 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -338,7 +338,7 @@ void nfsd_reset_versions(void)
static void set_max_drc(void)
{
#define NFSD_DRC_SIZE_SHIFT 10
- nfsd_drc_max_mem = (nr_free_buffer_pages()
+ nfsd_drc_max_mem = (nr_free_buffer_high_pages()
>> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE;
nfsd_drc_mem_used = 0;
spin_lock_init(&nfsd_drc_lock);
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 68df9c1..0df8905 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -216,7 +216,7 @@ struct swap_list_t {
extern unsigned long totalram_pages;
extern unsigned long totalreserve_pages;
extern unsigned long dirty_balance_reserve;
-extern unsigned int nr_free_buffer_pages(void);
+extern unsigned int nr_free_buffer_high_pages(void);
extern unsigned int nr_free_pagecache_pages(void);

/* Definition of global_page_state not available yet */
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b5783d8..c483e20 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -127,7 +127,7 @@ static int set_recommended_min_free_kbytes(void)

/* don't ever allow to reserve more than 5% of the lowmem */
recommended_min = min(recommended_min,
- (unsigned long) nr_free_buffer_pages() / 20);
+ (unsigned long) nr_free_buffer_high_pages() / 20);
recommended_min <<= (PAGE_SHIFT-10);

if (recommended_min > min_free_kbytes)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0713bfb..246d0bd 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1640,7 +1640,7 @@ static struct notifier_block __cpuinitdata ratelimit_nb = {
*
* We used to scale dirty pages according to how total memory
* related to pages that could be allocated for buffers (by
- * comparing nr_free_buffer_pages() to vm_total_pages.
+ * comparing nr_free_buffer_high_pages() to vm_total_pages.
*
* However, that was when we used "dirty_ratio" to scale with
* all memory, and we don't do that any more. "dirty_ratio"
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4aea19e..a021d91 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2806,13 +2806,14 @@ static unsigned int nr_free_zone_high_pages(int offset)
}

/*
- * Amount of free RAM allocatable within ZONE_DMA and ZONE_NORMAL
+ * Amount of free RAM allocatable that is above high watermark
+ * within ZONE_DMA and ZONE_NORMAL
*/
-unsigned int nr_free_buffer_pages(void)
+unsigned int nr_free_buffer_high_pages(void)
{
return nr_free_zone_high_pages(gfp_zone(GFP_USER));
}
-EXPORT_SYMBOL_GPL(nr_free_buffer_pages);
+EXPORT_SYMBOL_GPL(nr_free_buffer_high_pages);

/*
* Amount of free RAM allocatable within all zones
@@ -5351,7 +5352,7 @@ int __meminit init_per_zone_wmark_min(void)
{
unsigned long lowmem_kbytes;

- lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10);
+ lowmem_kbytes = nr_free_buffer_high_pages() * (PAGE_SIZE >> 10);

min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
if (min_free_kbytes < 128)
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index fd05c81..da5b0bc 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -542,7 +542,7 @@ static int p9_virtio_probe(struct virtio_device *vdev)
init_waitqueue_head(chan->vc_wq);
chan->ring_bufs_avail = 1;
/* Ceiling limit to avoid denial of service attacks */
- chan->p9_max_pages = nr_free_buffer_pages()/4;
+ chan->p9_max_pages = nr_free_buffer_high_pages() / 4;

mutex_lock(&virtio_9p_lock);
list_add_tail(&chan->chan_list, &virtio_chan_list);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2aa69c8..44a6ace 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3565,7 +3565,7 @@ __setup("thash_entries=", set_thash_entries);

void tcp_init_mem(struct net *net)
{
- unsigned long limit = nr_free_buffer_pages() / 8;
+ unsigned long limit = nr_free_buffer_high_pages() / 8;
limit = max(limit, 128UL);
net->ipv4.sysctl_tcp_mem[0] = limit / 4 * 3;
net->ipv4.sysctl_tcp_mem[1] = limit;
@@ -3635,7 +3635,7 @@ void __init tcp_init(void)

tcp_init_mem(&init_net);
/* Set per-socket limits to no more than 1/128 the pressure threshold */
- limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7);
+ limit = nr_free_buffer_high_pages() << (PAGE_SHIFT - 7);
max_wshare = min(4UL*1024*1024, limit);
max_rshare = min(6UL*1024*1024, limit);

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 1f4d405..cd61b9f 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2235,7 +2235,7 @@ void __init udp_init(void)
unsigned long limit;

udp_table_init(&udp_table, "UDP");
- limit = nr_free_buffer_pages() / 8;
+ limit = nr_free_buffer_high_pages() / 8;
limit = max(limit, 128UL);
sysctl_udp_mem[0] = limit / 4 * 3;
sysctl_udp_mem[1] = limit;
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index ec664cb..a53cfb3 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3723,7 +3723,7 @@ static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
tbl[idx++].data = &ipvs->sysctl_sync_ver;
ipvs->sysctl_sync_ports = 1;
tbl[idx++].data = &ipvs->sysctl_sync_ports;
- ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
+ ipvs->sysctl_sync_qlen_max = nr_free_buffer_high_pages() / 32;
tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
ipvs->sysctl_sync_sock_size = 0;
tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index f898b1c..8c135af 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1354,7 +1354,7 @@ SCTP_STATIC __init int sctp_init(void)
/* Initialize handle used for association ids. */
idr_init(&sctp_assocs_id);

- limit = nr_free_buffer_pages() / 8;
+ limit = nr_free_buffer_high_pages() / 8;
limit = max(limit, 128UL);
sysctl_sctp_mem[0] = limit / 4 * 3;
sysctl_sctp_mem[1] = limit;
--
1.7.1

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Next message: Casey Schaufler: "Re: [RFC] setxattr bugs"
Previous message: Zhang Yanfei: "[PATCH 1/3] mm: rename nr_free_zone_pages to nr_free_zone_high_pages"
In reply to: Zhang Yanfei: "[PATCH 1/3] mm: rename nr_free_zone_pages to nr_free_zone_high_pages"
Next in thread: Zhang Yanfei: "[PATCH 3/3] mm: rename nr_free_pagecache_pages to nr_free_pagecache_high_pages"
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