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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 13:11:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 13:11:15 -0800
commitf6e858a00af788bab0fd4c0b7f5cd788000edc18 (patch)
treef9403ca3671be9821dbf83e726e61dbe75fbca6b /mm/hugetlb.c
parent193c0d682525987db59ac3a24531a77e4947aa95 (diff)
parent98870901cce098bbe94d90d2c41d8d1fa8d94392 (diff)
Merge branch 'akpm' (Andrew's patch-bomb)
Merge misc VM changes from Andrew Morton: "The rest of most-of-MM. The other MM bits await a slab merge. This patch includes the addition of a huge zero_page. Not a performance boost but it an save large amounts of physical memory in some situations. Also a bunch of Fujitsu engineers are working on memory hotplug. Which, as it turns out, was badly broken. About half of their patches are included here; the remainder are 3.8 material." However, this merge disables CONFIG_MOVABLE_NODE, which was totally broken. We don't add new features with "default y", nor do we add Kconfig questions that are incomprehensible to most people without any help text. Does the feature even make sense without compaction or memory hotplug? * akpm: (54 commits) mm/bootmem.c: remove unused wrapper function reserve_bootmem_generic() mm/memory.c: remove unused code from do_wp_page() asm-generic, mm: pgtable: consolidate zero page helpers mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage hwpoison, hugetlbfs: fix RSS-counter warning hwpoison, hugetlbfs: fix "bad pmd" warning in unmapping hwpoisoned hugepage mm: protect against concurrent vma expansion memcg: do not check for mm in __mem_cgroup_count_vm_event tmpfs: support SEEK_DATA and SEEK_HOLE (reprise) mm: provide more accurate estimation of pages occupied by memmap fs/buffer.c: remove redundant initialization in alloc_page_buffers() fs/buffer.c: do not inline exported function writeback: fix a typo in comment mm: introduce new field "managed_pages" to struct zone mm, oom: remove statically defined arch functions of same name mm, oom: remove redundant sleep in pagefault oom handler mm, oom: cleanup pagefault oom handler memory_hotplug: allow online/offline memory to result movable node numa: add CONFIG_MOVABLE_NODE for movable-dedicated node mm, memcg: avoid unnecessary function call when memcg is disabled ...
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c36
1 files changed, 22 insertions, 14 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 34f372ad89d..88e7293b96b 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -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;
@@ -1844,7 +1844,7 @@ static void hugetlb_register_all_nodes(void)
{
int nid;
- for_each_node_state(nid, N_HIGH_MEMORY) {
+ for_each_node_state(nid, N_MEMORY) {
struct node *node = node_devices[nid];
if (node->dev.id == nid)
hugetlb_register_node(node);
@@ -1939,8 +1939,8 @@ 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);
/*
@@ -2035,11 +2035,11 @@ 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 +2386,10 @@ 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);
/*
@@ -3170,7 +3172,13 @@ 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]--;