diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 101 | ||||
| -rw-r--r-- | mm/mprotect.c | 47 |
2 files changed, 4 insertions, 144 deletions
diff --git a/mm/memory.c b/mm/memory.c index eba846bcf124..9898eeb9a21c 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3606,103 +3606,6 @@ out: return 0; } -/* NUMA hinting page fault entry point for regular pmds */ -#ifdef CONFIG_NUMA_BALANCING -static int do_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long addr, pmd_t *pmdp) -{ - pmd_t pmd; - pte_t *pte, *orig_pte; - unsigned long _addr = addr & PMD_MASK; - unsigned long offset; - spinlock_t *ptl; - bool numa = false; - int last_cpupid; - - spin_lock(&mm->page_table_lock); - pmd = *pmdp; - if (pmd_numa(pmd)) { - set_pmd_at(mm, _addr, pmdp, pmd_mknonnuma(pmd)); - numa = true; - } - spin_unlock(&mm->page_table_lock); - - if (!numa) - return 0; - - /* we're in a page fault so some vma must be in the range */ - BUG_ON(!vma); - BUG_ON(vma->vm_start >= _addr + PMD_SIZE); - offset = max(_addr, vma->vm_start) & ~PMD_MASK; - VM_BUG_ON(offset >= PMD_SIZE); - orig_pte = pte = pte_offset_map_lock(mm, pmdp, _addr, &ptl); - pte += offset >> PAGE_SHIFT; - for (addr = _addr + offset; addr < _addr + PMD_SIZE; pte++, addr += PAGE_SIZE) { - pte_t pteval = *pte; - struct page *page; - int page_nid = -1; - int target_nid; - bool migrated = false; - int flags = 0; - - if (!pte_present(pteval)) - continue; - if (!pte_numa(pteval)) - continue; - if (addr >= vma->vm_end) { - vma = find_vma(mm, addr); - /* there's a pte present so there must be a vma */ - BUG_ON(!vma); - BUG_ON(addr < vma->vm_start); - } - if (pte_numa(pteval)) { - pteval = pte_mknonnuma(pteval); - set_pte_at(mm, addr, pte, pteval); - } - page = vm_normal_page(vma, addr, pteval); - if (unlikely(!page)) - continue; - - /* - * Avoid grouping on DSO/COW pages in specific and RO pages - * in general, RO pages shouldn't hurt as much anyway since - * they can be in shared cache state. - */ - if (!pte_write(pteval)) - flags |= TNF_NO_GROUP; - - last_cpupid = page_cpupid_last(page); - page_nid = page_to_nid(page); - target_nid = numa_migrate_prep(page, vma, addr, page_nid); - pte_unmap_unlock(pte, ptl); - if (target_nid != -1) { - migrated = migrate_misplaced_page(page, vma, target_nid); - if (migrated) { - page_nid = target_nid; - flags |= TNF_MIGRATED; - } - } else { - put_page(page); - } - - if (page_nid != -1) - task_numa_fault(last_cpupid, page_nid, 1, flags); - - pte = pte_offset_map_lock(mm, pmdp, addr, &ptl); - } - pte_unmap_unlock(orig_pte, ptl); - - return 0; -} -#else -static int do_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long addr, pmd_t *pmdp) -{ - BUG(); - return 0; -} -#endif /* CONFIG_NUMA_BALANCING */ - /* * These routines also need to handle stuff like marking pages dirty * and/or accessed for architectures that don't do it in hardware (most @@ -3841,8 +3744,8 @@ retry: } } - if (pmd_numa(*pmd)) - return do_pmd_numa_page(mm, vma, address, pmd); + /* THP should already have been handled */ + BUG_ON(pmd_numa(*pmd)); /* * Use __pte_alloc instead of pte_alloc_map, because we can't diff --git a/mm/mprotect.c b/mm/mprotect.c index 9a74855f1241..a0302ac0be98 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -37,15 +37,12 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, pgprot_t newprot, - int dirty_accountable, int prot_numa, bool *ret_all_same_cpupid) + int dirty_accountable, int prot_numa) { struct mm_struct *mm = vma->vm_mm; pte_t *pte, oldpte; spinlock_t *ptl; unsigned long pages = 0; - bool all_same_cpupid = true; - int last_cpu = -1; - int last_pid = -1; pte = pte_offset_map_lock(mm, pmd, addr, &ptl); arch_enter_lazy_mmu_mode(); @@ -64,19 +61,6 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, page = vm_normal_page(vma, addr, oldpte); if (page) { - int cpupid = page_cpupid_last(page); - int this_cpu = cpupid_to_cpu(cpupid); - int this_pid = cpupid_to_pid(cpupid); - - if (last_cpu == -1) - last_cpu = this_cpu; - if (last_pid == -1) - last_pid = this_pid; - if (last_cpu != this_cpu || - last_pid != this_pid) { - all_same_cpupid = false; - } - if (!pte_numa(oldpte)) { ptent = pte_mknuma(ptent); updated = true; @@ -115,26 +99,9 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, arch_leave_lazy_mmu_mode(); pte_unmap_unlock(pte - 1, ptl); - *ret_all_same_cpupid = all_same_cpupid; return pages; } -#ifdef CONFIG_NUMA_BALANCING -static inline void change_pmd_protnuma(struct mm_struct *mm, unsigned long addr, - pmd_t *pmd) -{ - spin_lock(&mm->page_table_lock); - set_pmd_at(mm, addr & PMD_MASK, pmd, pmd_mknuma(*pmd)); - spin_unlock(&mm->page_table_lock); -} -#else -static inline void change_pmd_protnuma(struct mm_struct *mm, unsigned long addr, - pmd_t *pmd) -{ - BUG(); -} -#endif /* CONFIG_NUMA_BALANCING */ - static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pud_t *pud, unsigned long addr, unsigned long end, pgprot_t newprot, int dirty_accountable, int prot_numa) @@ -142,7 +109,6 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pmd_t *pmd; unsigned long next; unsigned long pages = 0; - bool all_same_cpupid; pmd = pmd_offset(pud, addr); do { @@ -168,17 +134,8 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, if (pmd_none_or_clear_bad(pmd)) continue; this_pages = change_pte_range(vma, pmd, addr, next, newprot, - dirty_accountable, prot_numa, &all_same_cpupid); + dirty_accountable, prot_numa); pages += this_pages; - - /* - * If we are changing protections for NUMA hinting faults then - * set pmd_numa if the examined pages were all on the same - * node. This allows a regular PMD to be handled as one fault - * and effectively batches the taking of the PTL - */ - if (prot_numa && this_pages && all_same_cpupid) - change_pmd_protnuma(vma->vm_mm, addr, pmd); } while (pmd++, addr = next, addr != end); return pages; |