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authorLinus Torvalds2017-11-15 19:42:40 -0800
committerLinus Torvalds2017-11-15 19:42:40 -0800
commit7c225c69f86c934e3be9be63ecde754e286838d7 (patch)
treeff2df419b0c4886b37407235f7d21215e4cf45e4 /arch/sparc
parent6363b3f3ac5be096d08c8c504128befa0c033529 (diff)
parent1b7176aea0a924ac59c6a283129d3e8eb00aa915 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: - a few misc bits - ocfs2 updates - almost all of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (131 commits) memory hotplug: fix comments when adding section mm: make alloc_node_mem_map a void call if we don't have CONFIG_FLAT_NODE_MEM_MAP mm: simplify nodemask printing mm,oom_reaper: remove pointless kthread_run() error check mm/page_ext.c: check if page_ext is not prepared writeback: remove unused function parameter mm: do not rely on preempt_count in print_vma_addr mm, sparse: do not swamp log with huge vmemmap allocation failures mm/hmm: remove redundant variable align_end mm/list_lru.c: mark expected switch fall-through mm/shmem.c: mark expected switch fall-through mm/page_alloc.c: broken deferred calculation mm: don't warn about allocations which stall for too long fs: fuse: account fuse_inode slab memory as reclaimable mm, page_alloc: fix potential false positive in __zone_watermark_ok mm: mlock: remove lru_add_drain_all() mm, sysctl: make NUMA stats configurable shmem: convert shmem_init_inodecache() to void Unify migrate_pages and move_pages access checks mm, pagevec: rename pagevec drained field ...
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/pgtable_64.h30
-rw-r--r--arch/sparc/mm/hugetlbpage.c3
-rw-r--r--arch/sparc/mm/init_64.c38
3 files changed, 49 insertions, 22 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index fd9d9bac7cfa..5a9e96be1665 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -231,6 +231,36 @@ extern unsigned long _PAGE_ALL_SZ_BITS;
extern struct page *mem_map_zero;
#define ZERO_PAGE(vaddr) (mem_map_zero)
+/* This macro must be updated when the size of struct page grows above 80
+ * or reduces below 64.
+ * The idea that compiler optimizes out switch() statement, and only
+ * leaves clrx instructions
+ */
+#define mm_zero_struct_page(pp) do { \
+ unsigned long *_pp = (void *)(pp); \
+ \
+ /* Check that struct page is either 64, 72, or 80 bytes */ \
+ BUILD_BUG_ON(sizeof(struct page) & 7); \
+ BUILD_BUG_ON(sizeof(struct page) < 64); \
+ BUILD_BUG_ON(sizeof(struct page) > 80); \
+ \
+ switch (sizeof(struct page)) { \
+ case 80: \
+ _pp[9] = 0; /* fallthrough */ \
+ case 72: \
+ _pp[8] = 0; /* fallthrough */ \
+ default: \
+ _pp[7] = 0; \
+ _pp[6] = 0; \
+ _pp[5] = 0; \
+ _pp[4] = 0; \
+ _pp[3] = 0; \
+ _pp[2] = 0; \
+ _pp[1] = 0; \
+ _pp[0] = 0; \
+ } \
+} while (0)
+
/* PFNs are real physical page numbers. However, mem_map only begins to record
* per-page information starting at pfn_base. This is to handle systems where
* the first physical page in the machine is at some huge physical address,
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index 5078b7f68890..0112d6942288 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -397,7 +397,7 @@ static void hugetlb_free_pte_range(struct mmu_gather *tlb, pmd_t *pmd,
pmd_clear(pmd);
pte_free_tlb(tlb, token, addr);
- atomic_long_dec(&tlb->mm->nr_ptes);
+ mm_dec_nr_ptes(tlb->mm);
}
static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
@@ -472,6 +472,7 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
pud = pud_offset(pgd, start);
pgd_clear(pgd);
pud_free_tlb(tlb, pud, start);
+ mm_dec_nr_puds(tlb->mm);
}
void hugetlb_free_pgd_range(struct mmu_gather *tlb,
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 61bdc1270d19..55ba62957e64 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2540,10 +2540,17 @@ void __init mem_init(void)
{
high_memory = __va(last_valid_pfn << PAGE_SHIFT);
- register_page_bootmem_info();
free_all_bootmem();
/*
+ * Must be done after boot memory is put on freelist, because here we
+ * might set fields in deferred struct pages that have not yet been
+ * initialized, and free_all_bootmem() initializes all the reserved
+ * deferred pages for us.
+ */
+ register_page_bootmem_info();
+
+ /*
* Set up the zero page, mark it reserved, so that page count
* is not manipulated when freeing the page from user ptes.
*/
@@ -2637,30 +2644,19 @@ int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend,
vstart = vstart & PMD_MASK;
vend = ALIGN(vend, PMD_SIZE);
for (; vstart < vend; vstart += PMD_SIZE) {
- pgd_t *pgd = pgd_offset_k(vstart);
+ pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
unsigned long pte;
pud_t *pud;
pmd_t *pmd;
- if (pgd_none(*pgd)) {
- pud_t *new = vmemmap_alloc_block(PAGE_SIZE, node);
-
- if (!new)
- return -ENOMEM;
- pgd_populate(&init_mm, pgd, new);
- }
-
- pud = pud_offset(pgd, vstart);
- if (pud_none(*pud)) {
- pmd_t *new = vmemmap_alloc_block(PAGE_SIZE, node);
+ if (!pgd)
+ return -ENOMEM;
- if (!new)
- return -ENOMEM;
- pud_populate(&init_mm, pud, new);
- }
+ pud = vmemmap_pud_populate(pgd, vstart, node);
+ if (!pud)
+ return -ENOMEM;
pmd = pmd_offset(pud, vstart);
-
pte = pmd_val(*pmd);
if (!(pte & _PAGE_VALID)) {
void *block = vmemmap_alloc_block(PMD_SIZE, node);
@@ -2927,7 +2923,7 @@ void __flush_tlb_all(void)
pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
- struct page *page = alloc_page(GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO);
+ struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
pte_t *pte = NULL;
if (page)
@@ -2939,11 +2935,11 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
- struct page *page = alloc_page(GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO);
+ struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
- free_hot_cold_page(page, 0);
+ free_unref_page(page);
return NULL;
}
return (pte_t *) page_address(page);