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Date: Thu, 4 Apr 2013 17:09:12 +0800
From: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
Michal Hocko <mhocko@...e.cz>, Mel Gorman <mgorman@...e.de>,
Rik van Riel <riel@...hat.com>,
Hillf Danton <dhillf@...il.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH 4/6] mm/hugetlb: use already exist huge_page_order() instead of h->order
Use already exist interface huge_page_order() instead of h->order to get
huge page order.
Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
mm/hugetlb.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 328f140..0cae950 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -593,7 +593,8 @@ static void update_and_free_page(struct hstate *h, struct page *page)
struct page *p;
int order = huge_page_order(h);
- VM_BUG_ON(!hugetlb_shrink_gigantic_pool && h->order >= MAX_ORDER);
+ VM_BUG_ON(!hugetlb_shrink_gigantic_pool &&
+ huge_page_order(h) >= MAX_ORDER);
h->nr_huge_pages--;
h->nr_huge_pages_node[page_to_nid(page)]--;
@@ -722,7 +723,7 @@ static struct page *alloc_fresh_huge_page_node(struct hstate *h, int nid)
{
struct page *page;
- if (h->order >= MAX_ORDER)
+ if (huge_page_order(h) >= MAX_ORDER)
return NULL;
page = alloc_pages_exact_node(nid,
@@ -876,7 +877,7 @@ static struct page *alloc_buddy_huge_page(struct hstate *h, int nid)
struct page *page;
unsigned int r_nid;
- if (h->order >= MAX_ORDER)
+ if (huge_page_order(h) >= MAX_ORDER)
return NULL;
/*
@@ -1071,7 +1072,7 @@ static void return_unused_surplus_pages(struct hstate *h,
h->resv_huge_pages -= unused_resv_pages;
/* Cannot return gigantic pages currently */
- if (h->order >= MAX_ORDER)
+ if (huge_page_order(h) >= MAX_ORDER)
return;
nr_pages = min(unused_resv_pages, h->surplus_huge_pages);
@@ -1265,7 +1266,7 @@ static void __init gather_bootmem_prealloc(void)
#endif
__ClearPageReserved(page);
WARN_ON(page_count(page) != 1);
- prep_compound_huge_page(page, h->order);
+ prep_compound_huge_page(page, huge_page_order(h));
prep_new_huge_page(h, page, page_to_nid(page));
/*
* If we had gigantic hugepages allocated at boot time, we need
@@ -1273,8 +1274,8 @@ static void __init gather_bootmem_prealloc(void)
* fix confusing memory reports from free(1) and another
* side-effects, like CommitLimit going negative.
*/
- if (h->order > (MAX_ORDER - 1))
- totalram_pages += 1 << h->order;
+ if (huge_page_order(h) > (MAX_ORDER - 1))
+ totalram_pages += 1 << huge_page_order(h);
}
}
@@ -1283,7 +1284,7 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
unsigned long i;
for (i = 0; i < h->max_huge_pages; ++i) {
- if (h->order >= MAX_ORDER) {
+ if (huge_page_order(h) >= MAX_ORDER) {
if (!alloc_bootmem_huge_page(h))
break;
} else if (!alloc_fresh_huge_page(h,
@@ -1299,7 +1300,7 @@ static void __init hugetlb_init_hstates(void)
for_each_hstate(h) {
/* oversize hugepages were init'ed in early boot */
- if (h->order < MAX_ORDER)
+ if (huge_page_order(h) < MAX_ORDER)
hugetlb_hstate_alloc_pages(h);
}
}
@@ -1333,7 +1334,7 @@ static void try_to_free_low(struct hstate *h, unsigned long count,
{
int i;
- if (h->order >= MAX_ORDER)
+ if (huge_page_order(h) >= MAX_ORDER)
return;
for_each_node_mask(i, *nodes_allowed) {
@@ -1416,8 +1417,8 @@ static unsigned long set_max_huge_pages(struct hstate *h, unsigned long count,
{
unsigned long min_count, ret;
- if (h->order >= MAX_ORDER && (!hugetlb_shrink_gigantic_pool ||
- count > persistent_huge_pages(h)))
+ if (huge_page_order(h) >= MAX_ORDER && (!hugetlb_shrink_gigantic_pool
+ || count > persistent_huge_pages(h)))
return h->max_huge_pages;
/*
@@ -1543,7 +1544,7 @@ static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
goto out;
h = kobj_to_hstate(kobj, &nid);
- if (h->order >= MAX_ORDER && !hugetlb_shrink_gigantic_pool) {
+ if (huge_page_order(h) >= MAX_ORDER && !hugetlb_shrink_gigantic_pool) {
err = -EINVAL;
goto out;
}
@@ -1626,7 +1627,7 @@ static ssize_t nr_overcommit_hugepages_store(struct kobject *kobj,
unsigned long input;
struct hstate *h = kobj_to_hstate(kobj, NULL);
- if (h->order >= MAX_ORDER)
+ if (huge_page_order(h) >= MAX_ORDER)
return -EINVAL;
err = strict_strtoul(buf, 10, &input);
@@ -2037,7 +2038,8 @@ static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
tmp = h->max_huge_pages;
- if (write && h->order >= MAX_ORDER && !hugetlb_shrink_gigantic_pool)
+ if (write && huge_page_order(h) >= MAX_ORDER &&
+ !hugetlb_shrink_gigantic_pool)
return -EINVAL;
table->data = &tmp;
@@ -2102,7 +2104,7 @@ int hugetlb_overcommit_handler(struct ctl_table *table, int write,
tmp = h->nr_overcommit_huge_pages;
- if (write && h->order >= MAX_ORDER)
+ if (write && huge_page_order(h) >= MAX_ORDER)
return -EINVAL;
table->data = &tmp;
@@ -3093,7 +3095,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
flush_tlb_range(vma, start, end);
mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
- return pages << h->order;
+ return pages << huge_page_order(h);
}
int hugetlb_reserve_pages(struct inode *inode,
--
1.7.10.4
--
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