diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/backing-dev.c | 21 | ||||
| -rw-r--r-- | mm/fremap.c | 11 | ||||
| -rw-r--r-- | mm/huge_memory.c | 4 | ||||
| -rw-r--r-- | mm/hugetlb.c | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 8 | ||||
| -rw-r--r-- | mm/memory.c | 50 | ||||
| -rw-r--r-- | mm/mempolicy.c | 6 | ||||
| -rw-r--r-- | mm/mmap.c | 6 | ||||
| -rw-r--r-- | mm/mremap.c | 21 | ||||
| -rw-r--r-- | mm/page-writeback.c | 4 | ||||
| -rw-r--r-- | mm/rmap.c | 17 | ||||
| -rw-r--r-- | mm/shmem.c | 11 | ||||
| -rw-r--r-- | mm/slab.c | 61 | ||||
| -rw-r--r-- | mm/slab.h | 5 | ||||
| -rw-r--r-- | mm/slab_common.c | 18 | ||||
| -rw-r--r-- | mm/slob.c | 4 | ||||
| -rw-r--r-- | mm/slub.c | 39 | ||||
| -rw-r--r-- | mm/swap.c | 29 | ||||
| -rw-r--r-- | mm/swapfile.c | 19 | ||||
| -rw-r--r-- | mm/vmpressure.c | 28 | ||||
| -rw-r--r-- | mm/vmstat.c | 6 | ||||
| -rw-r--r-- | mm/zbud.c | 2 |
22 files changed, 224 insertions, 148 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index d014ee5..37d9edc 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -180,7 +180,8 @@ static ssize_t name##_show(struct device *dev, \ struct backing_dev_info *bdi = dev_get_drvdata(dev); \ \ return snprintf(page, PAGE_SIZE-1, "%lld\n", (long long)expr); \ -} +} \ +static DEVICE_ATTR_RW(name); BDI_SHOW(read_ahead_kb, K(bdi->ra_pages)) @@ -231,16 +232,16 @@ static ssize_t stable_pages_required_show(struct device *dev, return snprintf(page, PAGE_SIZE-1, "%d\n", bdi_cap_stable_pages_required(bdi) ? 1 : 0); } +static DEVICE_ATTR_RO(stable_pages_required); -#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store) - -static struct device_attribute bdi_dev_attrs[] = { - __ATTR_RW(read_ahead_kb), - __ATTR_RW(min_ratio), - __ATTR_RW(max_ratio), - __ATTR_RO(stable_pages_required), - __ATTR_NULL, +static struct attribute *bdi_dev_attrs[] = { + &dev_attr_read_ahead_kb.attr, + &dev_attr_min_ratio.attr, + &dev_attr_max_ratio.attr, + &dev_attr_stable_pages_required.attr, + NULL, }; +ATTRIBUTE_GROUPS(bdi_dev); static __init int bdi_class_init(void) { @@ -248,7 +249,7 @@ static __init int bdi_class_init(void) if (IS_ERR(bdi_class)) return PTR_ERR(bdi_class); - bdi_class->dev_attrs = bdi_dev_attrs; + bdi_class->dev_groups = bdi_dev_groups; bdi_debug_init(); return 0; } diff --git a/mm/fremap.c b/mm/fremap.c index 87da359..5bff081 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -57,17 +57,22 @@ static int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, unsigned long pgoff, pgprot_t prot) { int err = -ENOMEM; - pte_t *pte; + pte_t *pte, ptfile; spinlock_t *ptl; pte = get_locked_pte(mm, addr, &ptl); if (!pte) goto out; - if (!pte_none(*pte)) + ptfile = pgoff_to_pte(pgoff); + + if (!pte_none(*pte)) { + if (pte_present(*pte) && pte_soft_dirty(*pte)) + pte_file_mksoft_dirty(ptfile); zap_pte(mm, vma, addr, pte); + } - set_pte_at(mm, addr, pte, pgoff_to_pte(pgoff)); + set_pte_at(mm, addr, pte, ptfile); /* * We don't need to run update_mmu_cache() here because the "file pte" * being installed by install_file_pte() is not a real pte - it's a diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 243e710..a92012a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1620,7 +1620,9 @@ static void __split_huge_page_refcount(struct page *page, ((1L << PG_referenced) | (1L << PG_swapbacked) | (1L << PG_mlocked) | - (1L << PG_uptodate))); + (1L << PG_uptodate) | + (1L << PG_active) | + (1L << PG_unevictable))); page_tail->flags |= (1L << PG_dirty); /* clear PageTail before overwriting first_page */ diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 83aff0a..b60f330 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2490,7 +2490,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start, mm = vma->vm_mm; - tlb_gather_mmu(&tlb, mm, 0); + tlb_gather_mmu(&tlb, mm, start, end); __unmap_hugepage_range(&tlb, vma, start, end, ref_page); tlb_finish_mmu(&tlb, start, end); } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b89d4cb..3b83957 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2503,7 +2503,7 @@ static void mem_cgroup_drain_pcp_counter(struct mem_cgroup *memcg, int cpu) spin_unlock(&memcg->pcp_counter_lock); } -static int __cpuinit memcg_cpu_hotplug_callback(struct notifier_block *nb, +static int memcg_cpu_hotplug_callback(struct notifier_block *nb, unsigned long action, void *hcpu) { @@ -3176,11 +3176,11 @@ int memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s, if (!s->memcg_params) return -ENOMEM; - INIT_WORK(&s->memcg_params->destroy, - kmem_cache_destroy_work_func); if (memcg) { s->memcg_params->memcg = memcg; s->memcg_params->root_cache = root_cache; + INIT_WORK(&s->memcg_params->destroy, + kmem_cache_destroy_work_func); } else s->memcg_params->is_root_cache = true; @@ -6304,6 +6304,7 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css) mem_cgroup_invalidate_reclaim_iterators(memcg); mem_cgroup_reparent_charges(memcg); mem_cgroup_destroy_all_caches(memcg); + vmpressure_cleanup(&memcg->vmpressure); } static void mem_cgroup_css_free(struct cgroup_subsys_state *css) @@ -6937,7 +6938,6 @@ struct cgroup_subsys mem_cgroup_subsys = { #ifdef CONFIG_MEMCG_SWAP static int __init enable_swap_account(char *s) { - /* consider enabled if no parameter or 1 is given */ if (!strcmp(s, "1")) really_do_swap_account = 1; else if (!strcmp(s, "0")) diff --git a/mm/memory.c b/mm/memory.c index 1ce2e2a..b3c6bf9 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -209,14 +209,15 @@ static int tlb_next_batch(struct mmu_gather *tlb) * tear-down from @mm. The @fullmm argument is used when @mm is without * users and we're going to destroy the full address space (exit/execve). */ -void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, bool fullmm) +void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long start, unsigned long end) { tlb->mm = mm; - tlb->fullmm = fullmm; + /* Is it from 0 to ~0? */ + tlb->fullmm = !(start | (end+1)); tlb->need_flush_all = 0; - tlb->start = -1UL; - tlb->end = 0; + tlb->start = start; + tlb->end = end; tlb->need_flush = 0; tlb->local.next = NULL; tlb->local.nr = 0; @@ -256,8 +257,6 @@ void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long e { struct mmu_gather_batch *batch, *next; - tlb->start = start; - tlb->end = end; tlb_flush_mmu(tlb); /* keep the page table cache within bounds */ @@ -1099,7 +1098,6 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb, spinlock_t *ptl; pte_t *start_pte; pte_t *pte; - unsigned long range_start = addr; again: init_rss_vec(rss); @@ -1141,9 +1139,12 @@ again: continue; if (unlikely(details) && details->nonlinear_vma && linear_page_index(details->nonlinear_vma, - addr) != page->index) - set_pte_at(mm, addr, pte, - pgoff_to_pte(page->index)); + addr) != page->index) { + pte_t ptfile = pgoff_to_pte(page->index); + if (pte_soft_dirty(ptent)) + pte_file_mksoft_dirty(ptfile); + set_pte_at(mm, addr, pte, ptfile); + } if (PageAnon(page)) rss[MM_ANONPAGES]--; else { @@ -1202,17 +1203,25 @@ again: * and page-free while holding it. */ if (force_flush) { + unsigned long old_end; + force_flush = 0; -#ifdef HAVE_GENERIC_MMU_GATHER - tlb->start = range_start; + /* + * Flush the TLB just for the previous segment, + * then update the range to be the remaining + * TLB range. + */ + old_end = tlb->end; tlb->end = addr; -#endif + tlb_flush_mmu(tlb); - if (addr != end) { - range_start = addr; + + tlb->start = addr; + tlb->end = old_end; + + if (addr != end) goto again; - } } return addr; @@ -1397,7 +1406,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start, unsigned long end = start + size; lru_add_drain(); - tlb_gather_mmu(&tlb, mm, 0); + tlb_gather_mmu(&tlb, mm, start, end); update_hiwater_rss(mm); mmu_notifier_invalidate_range_start(mm, start, end); for ( ; vma && vma->vm_start < end; vma = vma->vm_next) @@ -1423,7 +1432,7 @@ static void zap_page_range_single(struct vm_area_struct *vma, unsigned long addr unsigned long end = address + size; lru_add_drain(); - tlb_gather_mmu(&tlb, mm, 0); + tlb_gather_mmu(&tlb, mm, address, end); update_hiwater_rss(mm); mmu_notifier_invalidate_range_start(mm, address, end); unmap_single_vma(&tlb, vma, address, end, details); @@ -3115,6 +3124,8 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, exclusive = 1; } flush_icache_page(vma, page); + if (pte_swp_soft_dirty(orig_pte)) + pte = pte_mksoft_dirty(pte); set_pte_at(mm, address, page_table, pte); if (page == swapcache) do_page_add_anon_rmap(page, vma, address, exclusive); @@ -3408,6 +3419,8 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, entry = mk_pte(page, vma->vm_page_prot); if (flags & FAULT_FLAG_WRITE) entry = maybe_mkwrite(pte_mkdirty(entry), vma); + else if (pte_file(orig_pte) && pte_file_soft_dirty(orig_pte)) + pte_mksoft_dirty(entry); if (anon) { inc_mm_counter_fast(mm, MM_ANONPAGES); page_add_new_anon_rmap(page, vma, address); @@ -4066,6 +4079,7 @@ int generic_access_phys(struct vm_area_struct *vma, unsigned long addr, return len; } +EXPORT_SYMBOL_GPL(generic_access_phys); #endif /* diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 7431001..4baf12e 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -732,7 +732,10 @@ static int mbind_range(struct mm_struct *mm, unsigned long start, if (prev) { vma = prev; next = vma->vm_next; - continue; + if (mpol_equal(vma_policy(vma), new_pol)) + continue; + /* vma_merge() joined vma && vma->next, case 8 */ + goto replace; } if (vma->vm_start != vmstart) { err = split_vma(vma->vm_mm, vma, vmstart, 1); @@ -744,6 +747,7 @@ static int mbind_range(struct mm_struct *mm, unsigned long start, if (err) goto out; } + replace: err = vma_replace_policy(vma, new_pol); if (err) goto out; @@ -865,7 +865,7 @@ again: remove_next = 1 + (end > next->vm_end); if (next->anon_vma) anon_vma_merge(vma, next); mm->map_count--; - vma_set_policy(vma, vma_policy(next)); + mpol_put(vma_policy(next)); kmem_cache_free(vm_area_cachep, next); /* * In mprotect's case 6 (see comments on vma_merge), @@ -2336,7 +2336,7 @@ static void unmap_region(struct mm_struct *mm, struct mmu_gather tlb; lru_add_drain(); - tlb_gather_mmu(&tlb, mm, 0); + tlb_gather_mmu(&tlb, mm, start, end); update_hiwater_rss(mm); unmap_vmas(&tlb, vma, start, end); free_pgtables(&tlb, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS, @@ -2709,7 +2709,7 @@ void exit_mmap(struct mm_struct *mm) lru_add_drain(); flush_cache_mm(mm); - tlb_gather_mmu(&tlb, mm, 1); + tlb_gather_mmu(&tlb, mm, 0, -1); /* update_hiwater_rss(mm) here? but nobody should be looking */ /* Use -1 here to ensure all VMAs in the mm are unmapped */ unmap_vmas(&tlb, vma, 0, -1); diff --git a/mm/mremap.c b/mm/mremap.c index 457d34e..0843feb 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -15,6 +15,7 @@ #include <linux/swap.h> #include <linux/capability.h> #include <linux/fs.h> +#include <linux/swapops.h> #include <linux/highmem.h> #include <linux/security.h> #include <linux/syscalls.h> @@ -69,6 +70,23 @@ static pmd_t *alloc_new_pmd(struct mm_struct *mm, struct vm_area_struct *vma, return pmd; } +static pte_t move_soft_dirty_pte(pte_t pte) +{ + /* + * Set soft dirty bit so we can notice + * in userspace the ptes were moved. + */ +#ifdef CONFIG_MEM_SOFT_DIRTY + if (pte_present(pte)) + pte = pte_mksoft_dirty(pte); + else if (is_swap_pte(pte)) + pte = pte_swp_mksoft_dirty(pte); + else if (pte_file(pte)) + pte = pte_file_mksoft_dirty(pte); +#endif + return pte; +} + static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, unsigned long old_addr, unsigned long old_end, struct vm_area_struct *new_vma, pmd_t *new_pmd, @@ -126,7 +144,8 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, continue; pte = ptep_get_and_clear(mm, old_addr, old_pte); pte = move_pte(pte, new_vma->vm_page_prot, old_addr, new_addr); - set_pte_at(mm, new_addr, new_pte, pte_mksoft_dirty(pte)); + pte = move_soft_dirty_pte(pte); + set_pte_at(mm, new_addr, new_pte, pte); } arch_leave_lazy_mmu_mode(); diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 4514ad7..3f0c895 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1619,7 +1619,7 @@ void writeback_set_ratelimit(void) ratelimit_pages = 16; } -static int __cpuinit +static int ratelimit_handler(struct notifier_block *self, unsigned long action, void *hcpu) { @@ -1634,7 +1634,7 @@ ratelimit_handler(struct notifier_block *self, unsigned long action, } } -static struct notifier_block __cpuinitdata ratelimit_nb = { +static struct notifier_block ratelimit_nb = { .notifier_call = ratelimit_handler, .next = NULL, }; @@ -873,9 +873,6 @@ int page_referenced(struct page *page, vm_flags); if (we_locked) unlock_page(page); - - if (page_test_and_clear_young(page_to_pfn(page))) - referenced++; } out: return referenced; @@ -1236,6 +1233,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, swp_entry_to_pte(make_hwpoison_entry(page))); } else if (PageAnon(page)) { swp_entry_t entry = { .val = page_private(page) }; + pte_t swp_pte; if (PageSwapCache(page)) { /* @@ -1264,7 +1262,10 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, BUG_ON(TTU_ACTION(flags) != TTU_MIGRATION); entry = make_migration_entry(page, pte_write(pteval)); } - set_pte_at(mm, address, pte, swp_entry_to_pte(entry)); + swp_pte = swp_entry_to_pte(entry); + if (pte_soft_dirty(pteval)) + swp_pte = pte_swp_mksoft_dirty(swp_pte); + set_pte_at(mm, address, pte, swp_pte); BUG_ON(pte_file(*pte)); } else if (IS_ENABLED(CONFIG_MIGRATION) && (TTU_ACTION(flags) == TTU_MIGRATION)) { @@ -1401,8 +1402,12 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount, pteval = ptep_clear_flush(vma, address, pte); /* If nonlinear, store the file page offset in the pte. */ - if (page->index != linear_page_index(vma, address)) - set_pte_at(mm, address, pte, pgoff_to_pte(page->index)); + if (page->index != linear_page_index(vma, address)) { + pte_t ptfile = pgoff_to_pte(page->index); + if (pte_soft_dirty(pteval)) + pte_file_mksoft_dirty(ptfile); + set_pte_at(mm, address, pte, ptfile); + } /* Move the dirty bit to the physical page now the pte is gone. */ if (pte_dirty(pteval)) @@ -1798,7 +1798,8 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence) } } - offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE); + if (offset >= 0) + offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE); mutex_unlock(&inode->i_mutex); return offset; } @@ -2908,14 +2909,8 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range); /* common code */ -static char *shmem_dname(struct dentry *dentry, char *buffer, int buflen) -{ - return dynamic_dname(dentry, buffer, buflen, "/%s (deleted)", - dentry->d_name.name); -} - static struct dentry_operations anon_ops = { - .d_dname = shmem_dname + .d_dname = simple_dname }; /** @@ -565,7 +565,7 @@ static void init_node_lock_keys(int q) if (slab_state < UP) return; - for (i = 1; i < PAGE_SHIFT + MAX_ORDER; i++) { + for (i = 1; i <= KMALLOC_SHIFT_HIGH; i++) { struct kmem_cache_node *n; struct kmem_cache *cache = kmalloc_caches[i]; @@ -787,7 +787,7 @@ static void next_reap_node(void) * the CPUs getting into lockstep and contending for the global cache chain * lock. */ -static void __cpuinit start_cpu_timer(int cpu) +static void start_cpu_timer(int cpu) { struct delayed_work *reap_work = &per_cpu(slab_reap_work, cpu); @@ -1180,7 +1180,13 @@ static int init_cache_node_node(int node) return 0; } -static void __cpuinit cpuup_canceled(long cpu) +static inline int slabs_tofree(struct kmem_cache *cachep, + struct kmem_cache_node *n) +{ + return (n->free_objects + cachep->num - 1) / cachep->num; +} + +static void cpuup_canceled(long cpu) { struct kmem_cache *cachep; struct kmem_cache_node *n = NULL; @@ -1241,11 +1247,11 @@ free_array_cache: n = cachep->node[node]; if (!n) continue; - drain_freelist(cachep, n, n->free_objects); + drain_freelist(cachep, n, slabs_tofree(cachep, n)); } } -static int __cpuinit cpuup_prepare(long cpu) +static int cpuup_prepare(long cpu) { struct kmem_cache *cachep; struct kmem_cache_node *n = NULL; @@ -1328,7 +1334,7 @@ bad: return -ENOMEM; } -static int __cpuinit cpuup_callback(struct notifier_block *nfb, +static int cpuup_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { long cpu = (long)hcpu; @@ -1384,7 +1390,7 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb, return notifier_from_errno(err); } -static struct notifier_block __cpuinitdata cpucache_notifier = { +static struct notifier_block cpucache_notifier = { &cpuup_callback, NULL, 0 }; @@ -1408,7 +1414,7 @@ static int __meminit drain_cache_node_node(int node) if (!n) continue; - drain_freelist(cachep, n, n->free_objects); + drain_freelist(cachep, n, slabs_tofree(cachep, n)); if (!list_empty(&n->slabs_full) || !list_empty(&n->slabs_partial)) { @@ -2532,7 +2538,7 @@ static int __cache_shrink(struct kmem_cache *cachep) if (!n) continue; - drain_freelist(cachep, n, n->free_objects); + drain_freelist(cachep, n, slabs_tofree(cachep, n)); ret += !list_empty(&n->slabs_full) || !list_empty(&n->slabs_partial); @@ -3338,18 +3344,6 @@ done: return obj; } -/** - * kmem_cache_alloc_node - Allocate an object on the specified node - * @cachep: The cache to allocate from. - * @flags: See kmalloc(). - * @nodeid: node number of the target node. - * @caller: return address of caller, used for debug information - * - * Identical to kmem_cache_alloc but it will allocate memory on the given - * node, which can improve the performance for cpu bound structures. - * - * Fallback to other node is possible if __GFP_THISNODE is not set. - */ static __always_inline void * slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, unsigned long caller) @@ -3643,6 +3637,17 @@ EXPORT_SYMBOL(kmem_cache_alloc_trace); #endif #ifdef CONFIG_NUMA +/** + * kmem_cache_alloc_node - Allocate an object on the specified node + * @cachep: The cache to allocate from. + * @flags: See kmalloc(). + * @nodeid: node number of the target node. + * + * Identical to kmem_cache_alloc but it will allocate memory on the given + * node, which can improve the performance for cpu bound structures. + * + * Fallback to other node is possible if __GFP_THISNODE is not set. + */ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) { void *ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP_); @@ -4431,20 +4436,10 @@ static int leaks_show(struct seq_file *m, void *p) return 0; } -static void *s_next(struct seq_file *m, void *p, loff_t *pos) -{ - return seq_list_next(p, &slab_caches, pos); -} - -static void s_stop(struct seq_file *m, void *p) -{ - mutex_unlock(&slab_mutex); -} - static const struct seq_operations slabstats_op = { .start = leaks_start, - .next = s_next, - .stop = s_stop, + .next = slab_next, + .stop = slab_stop, .show = leaks_show, }; @@ -162,6 +162,8 @@ static inline const char *cache_name(struct kmem_cache *s) static inline struct kmem_cache *cache_from_memcg(struct kmem_cache *s, int idx) { + if (!s->memcg_params) + return NULL; return s->memcg_params->memcg_caches[idx]; } @@ -271,3 +273,6 @@ struct kmem_cache_node { #endif }; + +void *slab_next(struct seq_file *m, void *p, loff_t *pos); +void slab_stop(struct seq_file *m, void *p); diff --git a/mm/slab_common.c b/mm/slab_common.c index 2d41450..538bade 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -497,6 +497,13 @@ void __init create_kmalloc_caches(unsigned long flags) #ifdef CONFIG_SLABINFO + +#ifdef CONFIG_SLAB +#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR) +#else +#define SLABINFO_RIGHTS S_IRUSR +#endif + void print_slabinfo_header(struct seq_file *m) { /* @@ -531,12 +538,12 @@ static void *s_start(struct seq_file *m, loff_t *pos) return seq_list_start(&slab_caches, *pos); } -static void *s_next(struct seq_file *m, void *p, loff_t *pos) +void *slab_next(struct seq_file *m, void *p, loff_t *pos) { return seq_list_next(p, &slab_caches, pos); } -static void s_stop(struct seq_file *m, void *p) +void slab_stop(struct seq_file *m, void *p) { mutex_unlock(&slab_mutex); } @@ -613,8 +620,8 @@ static int s_show(struct seq_file *m, void *p) */ static const struct seq_operations slabinfo_op = { .start = s_start, - .next = s_next, - .stop = s_stop, + .next = slab_next, + .stop = slab_stop, .show = s_show, }; @@ -633,7 +640,8 @@ static const struct file_operations proc_slabinfo_operations = { static int __init slab_proc_init(void) { - proc_create("slabinfo", S_IRUSR, NULL, &proc_slabinfo_operations); + proc_create("slabinfo", SLABINFO_RIGHTS, NULL, + &proc_slabinfo_operations); return 0; } module_init(slab_proc_init); @@ -122,7 +122,7 @@ static inline void clear_slob_page_free(struct page *sp) } #define SLOB_UNIT sizeof(slob_t) -#define SLOB_UNITS(size) (((size) + SLOB_UNIT - 1)/SLOB_UNIT) +#define SLOB_UNITS(size) DIV_ROUND_UP(size, SLOB_UNIT) /* * struct slob_rcu is inserted at the tail of allocated slob blocks, which @@ -554,7 +554,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node) flags, node); } - if (c->ctor) + if (b && c->ctor) c->ctor(b); kmemleak_alloc_recursive(b, c->size, 1, c->flags, flags); @@ -123,6 +123,15 @@ static inline int kmem_cache_debug(struct kmem_cache *s) #endif } +static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s) +{ +#ifdef CONFIG_SLUB_CPU_PARTIAL + return !kmem_cache_debug(s); +#else + return false; +#endif +} + /* * Issues still to be resolved: * @@ -1573,7 +1582,8 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n, put_cpu_partial(s, page, 0); stat(s, CPU_PARTIAL_NODE); } - if (kmem_cache_debug(s) || available > s->cpu_partial / 2) + if (!kmem_cache_has_cpu_partial(s) + || available > s->cpu_partial / 2) break; } @@ -1884,6 +1894,7 @@ redo: static void unfreeze_partials(struct kmem_cache *s, struct kmem_cache_cpu *c) { +#ifdef CONFIG_SLUB_CPU_PARTIAL struct kmem_cache_node *n = NULL, *n2 = NULL; struct page *page, *discard_page = NULL; @@ -1938,6 +1949,7 @@ static void unfreeze_partials(struct kmem_cache *s, discard_slab(s, page); stat(s, FREE_SLAB); } +#endif } /* @@ -1951,6 +1963,7 @@ static void unfreeze_partials(struct kmem_cache *s, */ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) { +#ifdef CONFIG_SLUB_CPU_PARTIAL struct page *oldpage; int pages; int pobjects; @@ -1987,6 +2000,7 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) page->next = oldpage; } while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) != oldpage); +#endif } static inline void flush_slab(struct kmem_cache *s, struct kmem_cache_cpu *c) @@ -2358,7 +2372,7 @@ redo: object = c->freelist; page = c->page; - if (unlikely(!object || !node_match(page, node))) + if (unlikely(!object || !page || !node_match(page, node))) object = __slab_alloc(s, gfpflags, node, addr, c); else { @@ -2495,7 +2509,7 @@ static void __slab_free(struct kmem_cache *s, struct page *page, new.inuse--; if ((!new.inuse || !prior) && !was_frozen) { - if (!kmem_cache_debug(s) && !prior) + if (kmem_cache_has_cpu_partial(s) && !prior) /* * Slab was on no list before and will be partially empty @@ -2550,8 +2564,9 @@ static void __slab_free(struct kmem_cache *s, struct page *page, * Objects left in the slab. If it was not on the partial list before * then add it. */ - if (kmem_cache_debug(s) && unlikely(!prior)) { - remove_full(s, page); + if (!kmem_cache_has_cpu_partial(s) && unlikely(!prior)) { + if (kmem_cache_debug(s)) + remove_full(s, page); add_partial(n, page, DEACTIVATE_TO_TAIL); stat(s, FREE_ADD_PARTIAL); } @@ -3059,7 +3074,7 @@ static int kmem_cache_open(struct kmem_cache *s, unsigned long flags) * per node list when we run out of per cpu objects. We only fetch 50% * to keep some capacity around for frees. */ - if (kmem_cache_debug(s)) + if (!kmem_cache_has_cpu_partial(s)) s->cpu_partial = 0; else if (s->size >= PAGE_SIZE) s->cpu_partial = 2; @@ -3755,7 +3770,7 @@ int __kmem_cache_create(struct kmem_cache *s, unsigned long flags) * Use the cpu notifier to insure that the cpu slabs are flushed when * necessary. */ -static int __cpuinit slab_cpuup_callback(struct notifier_block *nfb, +static int slab_cpuup_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { long cpu = (long)hcpu; @@ -3781,7 +3796,7 @@ static int __cpuinit slab_cpuup_callback(struct notifier_block *nfb, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata slab_notifier = { +static struct notifier_block slab_notifier = { .notifier_call = slab_cpuup_callback }; @@ -4456,7 +4471,7 @@ static ssize_t cpu_partial_store(struct kmem_cache *s, const char *buf, err = strict_strtoul(buf, 10, &objects); if (err) return err; - if (objects && kmem_cache_debug(s)) + if (objects && !kmem_cache_has_cpu_partial(s)) return -EINVAL; s->cpu_partial = objects; @@ -5269,7 +5284,6 @@ __initcall(slab_sysfs_init); #ifdef CONFIG_SLABINFO void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo) { - unsigned long nr_partials = 0; unsigned long nr_slabs = 0; unsigned long nr_objs = 0; unsigned long nr_free = 0; @@ -5281,9 +5295,8 @@ void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo) if (!n) continue; - nr_partials += n->nr_partial; - nr_slabs += atomic_long_read(&n->nr_slabs); - nr_objs += atomic_long_read(&n->total_objects); + nr_slabs += node_nr_slabs(n); + nr_objs += node_nr_objs(n); nr_free += count_partial(n, count_free); } @@ -512,12 +512,7 @@ EXPORT_SYMBOL(__lru_cache_add); */ void lru_cache_add(struct page *page) { - if (PageActive(page)) { - VM_BUG_ON(PageUnevictable(page)); - } else if (PageUnevictable(page)) { - VM_BUG_ON(PageActive(page)); - } - + VM_BUG_ON(PageActive(page) && PageUnevictable(page)); VM_BUG_ON(PageLRU(page)); __lru_cache_add(page); } @@ -539,6 +534,7 @@ void add_page_to_unevictable_list(struct page *page) spin_lock_irq(&zone->lru_lock); lruvec = mem_cgroup_page_lruvec(page, zone); + ClearPageActive(page); SetPageUnevictable(page); SetPageLRU(page); add_page_to_lru_list(page, lruvec, LRU_UNEVICTABLE); @@ -774,8 +770,6 @@ EXPORT_SYMBOL(__pagevec_release); void lru_add_page_tail(struct page *page, struct page *page_tail, struct lruvec *lruvec, struct list_head *list) { - int uninitialized_var(active); - enum lru_list lru; const int file = 0; VM_BUG_ON(!PageHead(page)); @@ -787,20 +781,6 @@ void lru_add_page_tail(struct page *page, struct page *page_tail, if (!list) SetPageLRU(page_tail); - if (page_evictable(page_tail)) { - if (PageActive(page)) { - SetPageActive(page_tail); - active = 1; - lru = LRU_ACTIVE_ANON; - } else { - active = 0; - lru = LRU_INACTIVE_ANON; - } - } else { - SetPageUnevictable(page_tail); - lru = LRU_UNEVICTABLE; - } - if (likely(PageLRU(page))) list_add_tail(&page_tail->lru, &page->lru); else if (list) { @@ -816,13 +796,13 @@ void lru_add_page_tail(struct page *page, struct page *page_tail, * Use the standard add function to put page_tail on the list, * but then correct its position so they all end up in order. */ - add_page_to_lru_list(page_tail, lruvec, lru); + add_page_to_lru_list(page_tail, lruvec, page_lru(page_tail)); list_head = page_tail->lru.prev; list_move_tail(&page_tail->lru, list_head); } if (!PageUnevictable(page)) - update_page_reclaim_stat(lruvec, file, active); + update_page_reclaim_stat(lruvec, file, PageActive(page_tail)); } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ @@ -833,7 +813,6 @@ static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec, int active = PageActive(page); enum lru_list lru = page_lru(page); - VM_BUG_ON(PageUnevictable(page)); VM_BUG_ON(PageLRU(page)); SetPageLRU(page); diff --git a/mm/swapfile.c b/mm/swapfile.c index 36af6ee..6cf2e60 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -866,6 +866,21 @@ unsigned int count_swap_pages(int type, int free) } #endif /* CONFIG_HIBERNATION */ +static inline int maybe_same_pte(pte_t pte, pte_t swp_pte) +{ +#ifdef CONFIG_MEM_SOFT_DIRTY + /* + * When pte keeps soft dirty bit the pte generated + * from swap entry does not has it, still it's same + * pte from logical point of view. + */ + pte_t swp_pte_dirty = pte_swp_mksoft_dirty(swp_pte); + return pte_same(pte, swp_pte) || pte_same(pte, swp_pte_dirty); +#else + return pte_same(pte, swp_pte); +#endif +} + /* * No need to decide whether this PTE shares the swap entry with others, * just let do_wp_page work it out if a write is requested later - to @@ -892,7 +907,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd, } pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); - if (unlikely(!pte_same(*pte, swp_entry_to_pte(entry)))) { + if (unlikely(!maybe_same_pte(*pte, swp_entry_to_pte(entry)))) { mem_cgroup_cancel_charge_swapin(memcg); ret = 0; goto out; @@ -947,7 +962,7 @@ static int unuse_pte_range(struct vm_area_struct *vma, pmd_t *pmd, * swapoff spends a _lot_ of time in this loop! * Test inline before going to call unuse_pte. */ - if (unlikely(pte_same(*pte, swp_pte))) { + if (unlikely(maybe_same_pte(*pte, swp_pte))) { pte_unmap(pte); ret = unuse_pte(vma, pmd, addr, entry, page); if (ret) diff --git a/mm/vmpressure.c b/mm/vmpressure.c index 13489b1..e0f6283 100644 --- a/mm/vmpressure.c +++ b/mm/vmpressure.c @@ -175,12 +175,12 @@ static void vmpressure_work_fn(struct work_struct *work) if (!vmpr->scanned) return; - mutex_lock(&vmpr->sr_lock); + spin_lock(&vmpr->sr_lock); scanned = vmpr->scanned; reclaimed = vmpr->reclaimed; vmpr->scanned = 0; vmpr->reclaimed = 0; - mutex_unlock(&vmpr->sr_lock); + spin_unlock(&vmpr->sr_lock); do { if (vmpressure_event(vmpr, scanned, reclaimed)) @@ -235,13 +235,13 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, if (!scanned) return; - mutex_lock(&vmpr->sr_lock); + spin_lock(&vmpr->sr_lock); vmpr->scanned += scanned; vmpr->reclaimed += reclaimed; scanned = vmpr->scanned; - mutex_unlock(&vmpr->sr_lock); + spin_unlock(&vmpr->sr_lock); - if (scanned < vmpressure_win || work_pending(&vmpr->work)) + if (scanned < vmpressure_win) return; schedule_work(&vmpr->work); } @@ -364,8 +364,24 @@ void vmpressure_unregister_event(struct cgroup_subsys_state *css, */ void vmpressure_init(struct vmpressure *vmpr) { - mutex_init(&vmpr->sr_lock); + spin_lock_init(&vmpr->sr_lock); mutex_init(&vmpr->events_lock); INIT_LIST_HEAD(&vmpr->events); INIT_WORK(&vmpr->work, vmpressure_work_fn); } + +/** + * vmpressure_cleanup() - shuts down vmpressure control structure + * @vmpr: Structure to be cleaned up + * + * This function should be called before the structure in which it is + * embedded is cleaned up. + */ +void vmpressure_cleanup(struct vmpressure *vmpr) +{ + /* + * Make sure there is no pending work before eventfd infrastructure + * goes away. + */ + flush_work(&vmpr->work); +} diff --git a/mm/vmstat.c b/mm/vmstat.c index f42745e..20c2ef4 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1182,7 +1182,7 @@ static void vmstat_update(struct work_struct *w) round_jiffies_relative(sysctl_stat_interval)); } -static void __cpuinit start_cpu_timer(int cpu) +static void start_cpu_timer(int cpu) { struct delayed_work *work = &per_cpu(vmstat_work, cpu); @@ -1194,7 +1194,7 @@ static void __cpuinit start_cpu_timer(int cpu) * Use the cpu notifier to insure that the thresholds are recalculated * when necessary. */ -static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb, +static int vmstat_cpuup_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { @@ -1226,7 +1226,7 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata vmstat_notifier = +static struct notifier_block vmstat_notifier = { &vmstat_cpuup_callback, NULL, 0 }; #endif @@ -257,7 +257,7 @@ int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp, if (size <= 0 || gfp & __GFP_HIGHMEM) return -EINVAL; - if (size > PAGE_SIZE - ZHDR_SIZE_ALIGNED) + if (size > PAGE_SIZE - ZHDR_SIZE_ALIGNED - CHUNK_SIZE) return -ENOSPC; chunks = size_to_chunks(size); spin_lock(&pool->lock); |