summaryrefslogtreecommitdiffstats
path: root/mm/hugetlb.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c63
1 files changed, 34 insertions, 29 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 59a0059b39e2..4f3ea0b1e57c 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1,6 +1,6 @@
/*
* Generic hugetlb support.
- * (C) William Irwin, April 2004
+ * (C) Nadia Yvette Chambers, April 2004
*/
#include <linux/list.h>
#include <linux/init.h>
@@ -1057,7 +1057,7 @@ static void return_unused_surplus_pages(struct hstate *h,
* on-line nodes with memory and will handle the hstate accounting.
*/
while (nr_pages--) {
- if (!free_pool_huge_page(h, &node_states[N_HIGH_MEMORY], 1))
+ if (!free_pool_huge_page(h, &node_states[N_MEMORY], 1))
break;
}
}
@@ -1180,14 +1180,14 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
int __weak alloc_bootmem_huge_page(struct hstate *h)
{
struct huge_bootmem_page *m;
- int nr_nodes = nodes_weight(node_states[N_HIGH_MEMORY]);
+ int nr_nodes = nodes_weight(node_states[N_MEMORY]);
while (nr_nodes) {
void *addr;
addr = __alloc_bootmem_node_nopanic(
NODE_DATA(hstate_next_node_to_alloc(h,
- &node_states[N_HIGH_MEMORY])),
+ &node_states[N_MEMORY])),
huge_page_size(h), huge_page_size(h), 0);
if (addr) {
@@ -1259,7 +1259,7 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
if (!alloc_bootmem_huge_page(h))
break;
} else if (!alloc_fresh_huge_page(h,
- &node_states[N_HIGH_MEMORY]))
+ &node_states[N_MEMORY]))
break;
}
h->max_huge_pages = i;
@@ -1527,7 +1527,7 @@ static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
if (!(obey_mempolicy &&
init_nodemask_of_mempolicy(nodes_allowed))) {
NODEMASK_FREE(nodes_allowed);
- nodes_allowed = &node_states[N_HIGH_MEMORY];
+ nodes_allowed = &node_states[N_MEMORY];
}
} else if (nodes_allowed) {
/*
@@ -1537,11 +1537,11 @@ static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
count += h->nr_huge_pages - h->nr_huge_pages_node[nid];
init_nodemask_of_node(nodes_allowed, nid);
} else
- nodes_allowed = &node_states[N_HIGH_MEMORY];
+ nodes_allowed = &node_states[N_MEMORY];
h->max_huge_pages = set_max_huge_pages(h, count, nodes_allowed);
- if (nodes_allowed != &node_states[N_HIGH_MEMORY])
+ if (nodes_allowed != &node_states[N_MEMORY])
NODEMASK_FREE(nodes_allowed);
return len;
@@ -1800,7 +1800,7 @@ static void hugetlb_unregister_all_nodes(void)
* remove hstate attributes from any nodes that have them.
*/
for (nid = 0; nid < nr_node_ids; nid++)
- hugetlb_unregister_node(&node_devices[nid]);
+ hugetlb_unregister_node(node_devices[nid]);
}
/*
@@ -1844,8 +1844,8 @@ static void hugetlb_register_all_nodes(void)
{
int nid;
- for_each_node_state(nid, N_HIGH_MEMORY) {
- struct node *node = &node_devices[nid];
+ for_each_node_state(nid, N_MEMORY) {
+ struct node *node = node_devices[nid];
if (node->dev.id == nid)
hugetlb_register_node(node);
}
@@ -1906,14 +1906,12 @@ static int __init hugetlb_init(void)
default_hstate.max_huge_pages = default_hstate_max_huge_pages;
hugetlb_init_hstates();
-
gather_bootmem_prealloc();
-
report_hugepages();
hugetlb_sysfs_init();
-
hugetlb_register_all_nodes();
+ hugetlb_cgroup_file_init();
return 0;
}
@@ -1939,17 +1937,10 @@ void __init hugetlb_add_hstate(unsigned order)
for (i = 0; i < MAX_NUMNODES; ++i)
INIT_LIST_HEAD(&h->hugepage_freelists[i]);
INIT_LIST_HEAD(&h->hugepage_activelist);
- h->next_nid_to_alloc = first_node(node_states[N_HIGH_MEMORY]);
- h->next_nid_to_free = first_node(node_states[N_HIGH_MEMORY]);
+ h->next_nid_to_alloc = first_node(node_states[N_MEMORY]);
+ h->next_nid_to_free = first_node(node_states[N_MEMORY]);
snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB",
huge_page_size(h)/1024);
- /*
- * Add cgroup control files only if the huge page consists
- * of more than two normal pages. This is because we use
- * page[2].lru.next for storing cgoup details.
- */
- if (order >= HUGETLB_CGROUP_MIN_ORDER)
- hugetlb_cgroup_file_init(hugetlb_max_hstate - 1);
parsed_hstate = h;
}
@@ -2035,11 +2026,11 @@ static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
if (!(obey_mempolicy &&
init_nodemask_of_mempolicy(nodes_allowed))) {
NODEMASK_FREE(nodes_allowed);
- nodes_allowed = &node_states[N_HIGH_MEMORY];
+ nodes_allowed = &node_states[N_MEMORY];
}
h->max_huge_pages = set_max_huge_pages(h, tmp, nodes_allowed);
- if (nodes_allowed != &node_states[N_HIGH_MEMORY])
+ if (nodes_allowed != &node_states[N_MEMORY])
NODEMASK_FREE(nodes_allowed);
}
out:
@@ -2386,8 +2377,10 @@ again:
/*
* HWPoisoned hugepage is already unmapped and dropped reference
*/
- if (unlikely(is_hugetlb_entry_hwpoisoned(pte)))
+ if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) {
+ pte_clear(mm, address, ptep);
continue;
+ }
page = pte_page(pte);
/*
@@ -3014,7 +3007,7 @@ same_page:
return i ? i : -EFAULT;
}
-void hugetlb_change_protection(struct vm_area_struct *vma,
+unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
unsigned long address, unsigned long end, pgprot_t newprot)
{
struct mm_struct *mm = vma->vm_mm;
@@ -3022,6 +3015,7 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
pte_t *ptep;
pte_t pte;
struct hstate *h = hstate_vma(vma);
+ unsigned long pages = 0;
BUG_ON(address >= end);
flush_cache_range(vma, address, end);
@@ -3032,12 +3026,15 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
ptep = huge_pte_offset(mm, address);
if (!ptep)
continue;
- if (huge_pmd_unshare(mm, &address, ptep))
+ if (huge_pmd_unshare(mm, &address, ptep)) {
+ pages++;
continue;
+ }
if (!huge_pte_none(huge_ptep_get(ptep))) {
pte = huge_ptep_get_and_clear(mm, address, ptep);
pte = pte_mkhuge(pte_modify(pte, newprot));
set_huge_pte_at(mm, address, ptep, pte);
+ pages++;
}
}
spin_unlock(&mm->page_table_lock);
@@ -3049,6 +3046,8 @@ void 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;
}
int hugetlb_reserve_pages(struct inode *inode,
@@ -3170,7 +3169,13 @@ int dequeue_hwpoisoned_huge_page(struct page *hpage)
spin_lock(&hugetlb_lock);
if (is_hugepage_on_freelist(hpage)) {
- list_del(&hpage->lru);
+ /*
+ * Hwpoisoned hugepage isn't linked to activelist or freelist,
+ * but dangling hpage->lru can trigger list-debug warnings
+ * (this happens when we call unpoison_memory() on it),
+ * so let it point to itself with list_del_init().
+ */
+ list_del_init(&hpage->lru);
set_page_refcounted(hpage);
h->free_huge_pages--;
h->free_huge_pages_node[nid]--;
OpenPOWER on IntegriCloud