/* Movability of hugepages depends on migration support. */
static inline gfp_t htlb_alloc_mask(struct hstate *h)
{
- if (hugepages_treat_as_movable || hugepage_migration_support(h))
+ if (hugepages_treat_as_movable || hugepage_migration_supported(h))
return GFP_HIGHUSER_MOVABLE;
else
return GFP_HIGHUSER;
return NULL;
}
+/*
+ * common helper functions for hstate_next_node_to_{alloc|free}.
+ * We may have allocated or freed a huge page based on a different
+ * nodes_allowed previously, so h->next_node_to_{alloc|free} might
+ * be outside of *nodes_allowed. Ensure that we use an allowed
+ * node for alloc or free.
+ */
+static int next_node_allowed(int nid, nodemask_t *nodes_allowed)
+{
+ nid = next_node(nid, *nodes_allowed);
+ if (nid == MAX_NUMNODES)
+ nid = first_node(*nodes_allowed);
+ VM_BUG_ON(nid >= MAX_NUMNODES);
+
+ return nid;
+}
+
+static int get_valid_node_allowed(int nid, nodemask_t *nodes_allowed)
+{
+ if (!node_isset(nid, *nodes_allowed))
+ nid = next_node_allowed(nid, nodes_allowed);
+ return nid;
+}
+
+/*
+ * returns the previously saved node ["this node"] from which to
+ * allocate a persistent huge page for the pool and advance the
+ * next node from which to allocate, handling wrap at end of node
+ * mask.
+ */
+static int hstate_next_node_to_alloc(struct hstate *h,
+ nodemask_t *nodes_allowed)
+{
+ int nid;
+
+ VM_BUG_ON(!nodes_allowed);
+
+ nid = get_valid_node_allowed(h->next_nid_to_alloc, nodes_allowed);
+ h->next_nid_to_alloc = next_node_allowed(nid, nodes_allowed);
+
+ return nid;
+}
+
+/*
+ * helper for free_pool_huge_page() - return the previously saved
+ * node ["this node"] from which to free a huge page. Advance the
+ * next node id whether or not we find a free huge page to free so
+ * that the next attempt to free addresses the next node.
+ */
+static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed)
+{
+ int nid;
+
+ VM_BUG_ON(!nodes_allowed);
+
+ nid = get_valid_node_allowed(h->next_nid_to_free, nodes_allowed);
+ h->next_nid_to_free = next_node_allowed(nid, nodes_allowed);
+
+ return nid;
+}
+
+#define for_each_node_mask_to_alloc(hs, nr_nodes, node, mask) \
+ for (nr_nodes = nodes_weight(*mask); \
+ nr_nodes > 0 && \
+ ((node = hstate_next_node_to_alloc(hs, mask)) || 1); \
+ nr_nodes--)
+
+#define for_each_node_mask_to_free(hs, nr_nodes, node, mask) \
+ for (nr_nodes = nodes_weight(*mask); \
+ nr_nodes > 0 && \
+ ((node = hstate_next_node_to_free(hs, mask)) || 1); \
+ nr_nodes--)
+
+#if defined(CONFIG_CMA) && defined(CONFIG_X86_64)
+static void destroy_compound_gigantic_page(struct page *page,
+ unsigned long order)
+{
+ int i;
+ int nr_pages = 1 << order;
+ struct page *p = page + 1;
+
+ for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) {
+ __ClearPageTail(p);
+ set_page_refcounted(p);
+ p->first_page = NULL;
+ }
+
+ set_compound_order(page, 0);
+ __ClearPageHead(page);
+}
+
+static void free_gigantic_page(struct page *page, unsigned order)
+{
+ free_contig_range(page_to_pfn(page), 1 << order);
+}
+
+static int __alloc_gigantic_page(unsigned long start_pfn,
+ unsigned long nr_pages)
+{
+ unsigned long end_pfn = start_pfn + nr_pages;
+ return alloc_contig_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
+}
+
+static bool pfn_range_valid_gigantic(unsigned long start_pfn,
+ unsigned long nr_pages)
+{
+ unsigned long i, end_pfn = start_pfn + nr_pages;
+ struct page *page;
+
+ for (i = start_pfn; i < end_pfn; i++) {
+ if (!pfn_valid(i))
+ return false;
+
+ page = pfn_to_page(i);
+
+ if (PageReserved(page))
+ return false;
+
+ if (page_count(page) > 0)
+ return false;
+
+ if (PageHuge(page))
+ return false;
+ }
+
+ return true;
+}
+
+static bool zone_spans_last_pfn(const struct zone *zone,
+ unsigned long start_pfn, unsigned long nr_pages)
+{
+ unsigned long last_pfn = start_pfn + nr_pages - 1;
+ return zone_spans_pfn(zone, last_pfn);
+}
+
+static struct page *alloc_gigantic_page(int nid, unsigned order)
+{
+ unsigned long nr_pages = 1 << order;
+ unsigned long ret, pfn, flags;
+ struct zone *z;
+
+ z = NODE_DATA(nid)->node_zones;
+ for (; z - NODE_DATA(nid)->node_zones < MAX_NR_ZONES; z++) {
+ spin_lock_irqsave(&z->lock, flags);
+
+ pfn = ALIGN(z->zone_start_pfn, nr_pages);
+ while (zone_spans_last_pfn(z, pfn, nr_pages)) {
+ if (pfn_range_valid_gigantic(pfn, nr_pages)) {
+ /*
+ * We release the zone lock here because
+ * alloc_contig_range() will also lock the zone
+ * at some point. If there's an allocation
+ * spinning on this lock, it may win the race
+ * and cause alloc_contig_range() to fail...
+ */
+ spin_unlock_irqrestore(&z->lock, flags);
+ ret = __alloc_gigantic_page(pfn, nr_pages);
+ if (!ret)
+ return pfn_to_page(pfn);
+ spin_lock_irqsave(&z->lock, flags);
+ }
+ pfn += nr_pages;
+ }
+
+ spin_unlock_irqrestore(&z->lock, flags);
+ }
+
+ return NULL;
+}
+
+static void prep_new_huge_page(struct hstate *h, struct page *page, int nid);
+static void prep_compound_gigantic_page(struct page *page, unsigned long order);
+
+static struct page *alloc_fresh_gigantic_page_node(struct hstate *h, int nid)
+{
+ struct page *page;
+
+ page = alloc_gigantic_page(nid, huge_page_order(h));
+ if (page) {
+ prep_compound_gigantic_page(page, huge_page_order(h));
+ prep_new_huge_page(h, page, nid);
+ }
+
+ return page;
+}
+
+static int alloc_fresh_gigantic_page(struct hstate *h,
+ nodemask_t *nodes_allowed)
+{
+ struct page *page = NULL;
+ int nr_nodes, node;
+
+ for_each_node_mask_to_alloc(h, nr_nodes, node, nodes_allowed) {
+ page = alloc_fresh_gigantic_page_node(h, node);
+ if (page)
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline bool gigantic_page_supported(void) { return true; }
+#else
+static inline bool gigantic_page_supported(void) { return false; }
+static inline void free_gigantic_page(struct page *page, unsigned order) { }
+static inline void destroy_compound_gigantic_page(struct page *page,
+ unsigned long order) { }
+static inline int alloc_fresh_gigantic_page(struct hstate *h,
+ nodemask_t *nodes_allowed) { return 0; }
+#endif
+
static void update_and_free_page(struct hstate *h, struct page *page)
{
int i;
- VM_BUG_ON(h->order >= MAX_ORDER);
+ if (hstate_is_gigantic(h) && !gigantic_page_supported())
+ return;
h->nr_huge_pages--;
h->nr_huge_pages_node[page_to_nid(page)]--;
for (i = 0; i < pages_per_huge_page(h); i++) {
page[i].flags &= ~(1 << PG_locked | 1 << PG_error |
1 << PG_referenced | 1 << PG_dirty |
- 1 << PG_active | 1 << PG_reserved |
- 1 << PG_private | 1 << PG_writeback);
+ 1 << PG_active | 1 << PG_private |
+ 1 << PG_writeback);
}
VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page);
set_compound_page_dtor(page, NULL);
set_page_refcounted(page);
- arch_release_hugepage(page);
- __free_pages(page, huge_page_order(h));
+ if (hstate_is_gigantic(h)) {
+ destroy_compound_gigantic_page(page, huge_page_order(h));
+ free_gigantic_page(page, huge_page_order(h));
+ } else {
+ arch_release_hugepage(page);
+ __free_pages(page, huge_page_order(h));
+ }
}
struct hstate *size_to_hstate(unsigned long size)
if (restore_reserve)
h->resv_huge_pages++;
- if (h->surplus_huge_pages_node[nid] && huge_page_order(h) < MAX_ORDER) {
+ if (h->surplus_huge_pages_node[nid]) {
/* remove the page from active list */
list_del(&page->lru);
update_and_free_page(h, page);
put_page(page); /* free it into the hugepage allocator */
}
-static void __init prep_compound_gigantic_page(struct page *page,
- unsigned long order)
+static void prep_compound_gigantic_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
{
struct page *page;
- if (h->order >= MAX_ORDER)
- return NULL;
-
page = alloc_pages_exact_node(nid,
htlb_alloc_mask(h)|__GFP_COMP|__GFP_THISNODE|
__GFP_REPEAT|__GFP_NOWARN,
return page;
}
-/*
- * common helper functions for hstate_next_node_to_{alloc|free}.
- * We may have allocated or freed a huge page based on a different
- * nodes_allowed previously, so h->next_node_to_{alloc|free} might
- * be outside of *nodes_allowed. Ensure that we use an allowed
- * node for alloc or free.
- */
-static int next_node_allowed(int nid, nodemask_t *nodes_allowed)
-{
- nid = next_node(nid, *nodes_allowed);
- if (nid == MAX_NUMNODES)
- nid = first_node(*nodes_allowed);
- VM_BUG_ON(nid >= MAX_NUMNODES);
-
- return nid;
-}
-
-static int get_valid_node_allowed(int nid, nodemask_t *nodes_allowed)
-{
- if (!node_isset(nid, *nodes_allowed))
- nid = next_node_allowed(nid, nodes_allowed);
- return nid;
-}
-
-/*
- * returns the previously saved node ["this node"] from which to
- * allocate a persistent huge page for the pool and advance the
- * next node from which to allocate, handling wrap at end of node
- * mask.
- */
-static int hstate_next_node_to_alloc(struct hstate *h,
- nodemask_t *nodes_allowed)
-{
- int nid;
-
- VM_BUG_ON(!nodes_allowed);
-
- nid = get_valid_node_allowed(h->next_nid_to_alloc, nodes_allowed);
- h->next_nid_to_alloc = next_node_allowed(nid, nodes_allowed);
-
- return nid;
-}
-
-/*
- * helper for free_pool_huge_page() - return the previously saved
- * node ["this node"] from which to free a huge page. Advance the
- * next node id whether or not we find a free huge page to free so
- * that the next attempt to free addresses the next node.
- */
-static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed)
-{
- int nid;
-
- VM_BUG_ON(!nodes_allowed);
-
- nid = get_valid_node_allowed(h->next_nid_to_free, nodes_allowed);
- h->next_nid_to_free = next_node_allowed(nid, nodes_allowed);
-
- return nid;
-}
-
-#define for_each_node_mask_to_alloc(hs, nr_nodes, node, mask) \
- for (nr_nodes = nodes_weight(*mask); \
- nr_nodes > 0 && \
- ((node = hstate_next_node_to_alloc(hs, mask)) || 1); \
- nr_nodes--)
-
-#define for_each_node_mask_to_free(hs, nr_nodes, node, mask) \
- for (nr_nodes = nodes_weight(*mask); \
- nr_nodes > 0 && \
- ((node = hstate_next_node_to_free(hs, mask)) || 1); \
- nr_nodes--)
-
static int alloc_fresh_huge_page(struct hstate *h, nodemask_t *nodes_allowed)
{
struct page *page;
struct page *page;
unsigned int r_nid;
- if (h->order >= MAX_ORDER)
+ if (hstate_is_gigantic(h))
return NULL;
/*
h->resv_huge_pages -= unused_resv_pages;
/* Cannot return gigantic pages currently */
- if (h->order >= MAX_ORDER)
+ if (hstate_is_gigantic(h))
return;
nr_pages = min(unused_resv_pages, h->surplus_huge_pages);
while (nr_pages--) {
if (!free_pool_huge_page(h, &node_states[N_MEMORY], 1))
break;
+ cond_resched_lock(&hugetlb_lock);
}
}
return ERR_PTR(-ENOSPC);
ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), &h_cg);
- if (ret) {
- if (chg || avoid_reserve)
- hugepage_subpool_put_pages(spool, 1);
- return ERR_PTR(-ENOSPC);
- }
+ if (ret)
+ goto out_subpool_put;
+
spin_lock(&hugetlb_lock);
page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve, chg);
if (!page) {
spin_unlock(&hugetlb_lock);
page = alloc_buddy_huge_page(h, NUMA_NO_NODE);
- if (!page) {
- hugetlb_cgroup_uncharge_cgroup(idx,
- pages_per_huge_page(h),
- h_cg);
- if (chg || avoid_reserve)
- hugepage_subpool_put_pages(spool, 1);
- return ERR_PTR(-ENOSPC);
- }
+ if (!page)
+ goto out_uncharge_cgroup;
+
spin_lock(&hugetlb_lock);
list_move(&page->lru, &h->hugepage_activelist);
/* Fall through */
vma_commit_reservation(h, vma, addr);
return page;
+
+out_uncharge_cgroup:
+ hugetlb_cgroup_uncharge_cgroup(idx, pages_per_huge_page(h), h_cg);
+out_subpool_put:
+ if (chg || avoid_reserve)
+ hugepage_subpool_put_pages(spool, 1);
+ return ERR_PTR(-ENOSPC);
}
/*
* fix confusing memory reports from free(1) and another
* side-effects, like CommitLimit going negative.
*/
- if (h->order > (MAX_ORDER - 1))
+ if (hstate_is_gigantic(h))
adjust_managed_page_count(page, 1 << h->order);
}
}
unsigned long i;
for (i = 0; i < h->max_huge_pages; ++i) {
- if (h->order >= MAX_ORDER) {
+ if (hstate_is_gigantic(h)) {
if (!alloc_bootmem_huge_page(h))
break;
} else if (!alloc_fresh_huge_page(h,
for_each_hstate(h) {
/* oversize hugepages were init'ed in early boot */
- if (h->order < MAX_ORDER)
+ if (!hstate_is_gigantic(h))
hugetlb_hstate_alloc_pages(h);
}
}
{
int i;
- if (h->order >= MAX_ORDER)
+ if (hstate_is_gigantic(h))
return;
for_each_node_mask(i, *nodes_allowed) {
{
unsigned long min_count, ret;
- if (h->order >= MAX_ORDER)
+ if (hstate_is_gigantic(h) && !gigantic_page_supported())
return h->max_huge_pages;
/*
* and reducing the surplus.
*/
spin_unlock(&hugetlb_lock);
- ret = alloc_fresh_huge_page(h, nodes_allowed);
+ if (hstate_is_gigantic(h))
+ ret = alloc_fresh_gigantic_page(h, nodes_allowed);
+ else
+ ret = alloc_fresh_huge_page(h, nodes_allowed);
spin_lock(&hugetlb_lock);
if (!ret)
goto out;
goto out;
h = kobj_to_hstate(kobj, &nid);
- if (h->order >= MAX_ORDER) {
+ if (hstate_is_gigantic(h) && !gigantic_page_supported()) {
err = -EINVAL;
goto out;
}
unsigned long input;
struct hstate *h = kobj_to_hstate(kobj, NULL);
- if (h->order >= MAX_ORDER)
+ if (hstate_is_gigantic(h))
return -EINVAL;
err = kstrtoul(buf, 10, &input);
{
int i;
- /* Some platform decide whether they support huge pages at boot
- * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when
- * there is no such support
- */
- if (HPAGE_SHIFT == 0)
+ if (!hugepages_supported())
return 0;
if (!size_to_hstate(default_hstate_size)) {
unsigned long tmp;
int ret;
+ if (!hugepages_supported())
+ return -ENOTSUPP;
+
tmp = h->max_huge_pages;
- if (write && h->order >= MAX_ORDER)
+ if (write && hstate_is_gigantic(h) && !gigantic_page_supported())
return -EINVAL;
table->data = &tmp;
unsigned long tmp;
int ret;
+ if (!hugepages_supported())
+ return -ENOTSUPP;
+
tmp = h->nr_overcommit_huge_pages;
- if (write && h->order >= MAX_ORDER)
+ if (write && hstate_is_gigantic(h))
return -EINVAL;
table->data = &tmp;
void hugetlb_report_meminfo(struct seq_file *m)
{
struct hstate *h = &default_hstate;
+ if (!hugepages_supported())
+ return;
seq_printf(m,
"HugePages_Total: %5lu\n"
"HugePages_Free: %5lu\n"
int hugetlb_report_node_meminfo(int nid, char *buf)
{
struct hstate *h = &default_hstate;
+ if (!hugepages_supported())
+ return 0;
return sprintf(buf,
"Node %d HugePages_Total: %5u\n"
"Node %d HugePages_Free: %5u\n"
struct hstate *h;
int nid;
+ if (!hugepages_supported())
+ return;
+
for_each_node_state(nid, N_MEMORY)
for_each_hstate(h)
pr_info("Node %d hugepages_total=%u hugepages_free=%u hugepages_surp=%u hugepages_size=%lukB\n",
git.openpandora.org / pandora-kernel.git / blobdiff