diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 160 |
1 files changed, 81 insertions, 79 deletions
diff --git a/mm/slub.c b/mm/slub.c index 34dcc09e2ec9..4552319148f6 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1836,8 +1836,8 @@ static void __free_slab(struct kmem_cache *s, struct page *page) __ClearPageSlabPfmemalloc(page); __ClearPageSlab(page); - - page->mapping = NULL; + /* In union with page->mapping where page allocator expects NULL */ + page->slab_cache = NULL; if (current->reclaim_state) current->reclaim_state->reclaimed_slab += pages; unaccount_slab_page(page, order, s); @@ -2245,8 +2245,7 @@ redo: } } else { m = M_FULL; -#ifdef CONFIG_SLUB_DEBUG - if ((s->flags & SLAB_STORE_USER) && !lock) { + if (kmem_cache_debug_flags(s, SLAB_STORE_USER) && !lock) { lock = 1; /* * This also ensures that the scanning of full @@ -2255,7 +2254,6 @@ redo: */ spin_lock(&n->list_lock); } -#endif } if (l != m) { @@ -3433,7 +3431,7 @@ static inline int calculate_order(unsigned int size) */ min_objects = slub_min_objects; if (!min_objects) - min_objects = 4 * (fls(nr_cpu_ids) + 1); + min_objects = 4 * (fls(num_online_cpus()) + 1); max_objects = order_objects(slub_max_order, size); min_objects = min(min_objects, max_objects); @@ -4726,7 +4724,7 @@ static void process_slab(struct loc_track *t, struct kmem_cache *s, } static int list_locations(struct kmem_cache *s, char *buf, - enum track_item alloc) + enum track_item alloc) { int len = 0; unsigned long i; @@ -4736,7 +4734,7 @@ static int list_locations(struct kmem_cache *s, char *buf, if (!alloc_loc_track(&t, PAGE_SIZE / sizeof(struct location), GFP_KERNEL)) { - return sprintf(buf, "Out of memory\n"); + return sysfs_emit(buf, "Out of memory\n"); } /* Push back cpu slabs */ flush_all(s); @@ -4759,50 +4757,45 @@ static int list_locations(struct kmem_cache *s, char *buf, for (i = 0; i < t.count; i++) { struct location *l = &t.loc[i]; - if (len > PAGE_SIZE - KSYM_SYMBOL_LEN - 100) - break; - len += sprintf(buf + len, "%7ld ", l->count); + len += sysfs_emit_at(buf, len, "%7ld ", l->count); if (l->addr) - len += sprintf(buf + len, "%pS", (void *)l->addr); + len += sysfs_emit_at(buf, len, "%pS", (void *)l->addr); else - len += sprintf(buf + len, "<not-available>"); - - if (l->sum_time != l->min_time) { - len += sprintf(buf + len, " age=%ld/%ld/%ld", - l->min_time, - (long)div_u64(l->sum_time, l->count), - l->max_time); - } else - len += sprintf(buf + len, " age=%ld", - l->min_time); + len += sysfs_emit_at(buf, len, "<not-available>"); + + if (l->sum_time != l->min_time) + len += sysfs_emit_at(buf, len, " age=%ld/%ld/%ld", + l->min_time, + (long)div_u64(l->sum_time, + l->count), + l->max_time); + else + len += sysfs_emit_at(buf, len, " age=%ld", l->min_time); if (l->min_pid != l->max_pid) - len += sprintf(buf + len, " pid=%ld-%ld", - l->min_pid, l->max_pid); + len += sysfs_emit_at(buf, len, " pid=%ld-%ld", + l->min_pid, l->max_pid); else - len += sprintf(buf + len, " pid=%ld", - l->min_pid); + len += sysfs_emit_at(buf, len, " pid=%ld", + l->min_pid); if (num_online_cpus() > 1 && - !cpumask_empty(to_cpumask(l->cpus)) && - len < PAGE_SIZE - 60) - len += scnprintf(buf + len, PAGE_SIZE - len - 50, - " cpus=%*pbl", - cpumask_pr_args(to_cpumask(l->cpus))); - - if (nr_online_nodes > 1 && !nodes_empty(l->nodes) && - len < PAGE_SIZE - 60) - len += scnprintf(buf + len, PAGE_SIZE - len - 50, - " nodes=%*pbl", - nodemask_pr_args(&l->nodes)); - - len += sprintf(buf + len, "\n"); + !cpumask_empty(to_cpumask(l->cpus))) + len += sysfs_emit_at(buf, len, " cpus=%*pbl", + cpumask_pr_args(to_cpumask(l->cpus))); + + if (nr_online_nodes > 1 && !nodes_empty(l->nodes)) + len += sysfs_emit_at(buf, len, " nodes=%*pbl", + nodemask_pr_args(&l->nodes)); + + len += sysfs_emit_at(buf, len, "\n"); } free_loc_track(&t); if (!t.count) - len += sprintf(buf, "No data\n"); + len += sysfs_emit_at(buf, len, "No data\n"); + return len; } #endif /* CONFIG_SLUB_DEBUG */ @@ -4899,12 +4892,13 @@ __setup("slub_memcg_sysfs=", setup_slub_memcg_sysfs); #endif static ssize_t show_slab_objects(struct kmem_cache *s, - char *buf, unsigned long flags) + char *buf, unsigned long flags) { unsigned long total = 0; int node; int x; unsigned long *nodes; + int len = 0; nodes = kcalloc(nr_node_ids, sizeof(unsigned long), GFP_KERNEL); if (!nodes) @@ -4993,15 +4987,19 @@ static ssize_t show_slab_objects(struct kmem_cache *s, nodes[node] += x; } } - x = sprintf(buf, "%lu", total); + + len += sysfs_emit_at(buf, len, "%lu", total); #ifdef CONFIG_NUMA - for (node = 0; node < nr_node_ids; node++) + for (node = 0; node < nr_node_ids; node++) { if (nodes[node]) - x += sprintf(buf + x, " N%d=%lu", - node, nodes[node]); + len += sysfs_emit_at(buf, len, " N%d=%lu", + node, nodes[node]); + } #endif + len += sysfs_emit_at(buf, len, "\n"); kfree(nodes); - return x + sprintf(buf + x, "\n"); + + return len; } #define to_slab_attr(n) container_of(n, struct slab_attribute, attr) @@ -5023,37 +5021,37 @@ struct slab_attribute { static ssize_t slab_size_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", s->size); + return sysfs_emit(buf, "%u\n", s->size); } SLAB_ATTR_RO(slab_size); static ssize_t align_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", s->align); + return sysfs_emit(buf, "%u\n", s->align); } SLAB_ATTR_RO(align); static ssize_t object_size_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", s->object_size); + return sysfs_emit(buf, "%u\n", s->object_size); } SLAB_ATTR_RO(object_size); static ssize_t objs_per_slab_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", oo_objects(s->oo)); + return sysfs_emit(buf, "%u\n", oo_objects(s->oo)); } SLAB_ATTR_RO(objs_per_slab); static ssize_t order_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", oo_order(s->oo)); + return sysfs_emit(buf, "%u\n", oo_order(s->oo)); } SLAB_ATTR_RO(order); static ssize_t min_partial_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%lu\n", s->min_partial); + return sysfs_emit(buf, "%lu\n", s->min_partial); } static ssize_t min_partial_store(struct kmem_cache *s, const char *buf, @@ -5073,7 +5071,7 @@ SLAB_ATTR(min_partial); static ssize_t cpu_partial_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", slub_cpu_partial(s)); + return sysfs_emit(buf, "%u\n", slub_cpu_partial(s)); } static ssize_t cpu_partial_store(struct kmem_cache *s, const char *buf, @@ -5098,13 +5096,13 @@ static ssize_t ctor_show(struct kmem_cache *s, char *buf) { if (!s->ctor) return 0; - return sprintf(buf, "%pS\n", s->ctor); + return sysfs_emit(buf, "%pS\n", s->ctor); } SLAB_ATTR_RO(ctor); static ssize_t aliases_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", s->refcount < 0 ? 0 : s->refcount - 1); + return sysfs_emit(buf, "%d\n", s->refcount < 0 ? 0 : s->refcount - 1); } SLAB_ATTR_RO(aliases); @@ -5137,7 +5135,7 @@ static ssize_t slabs_cpu_partial_show(struct kmem_cache *s, char *buf) int objects = 0; int pages = 0; int cpu; - int len; + int len = 0; for_each_online_cpu(cpu) { struct page *page; @@ -5150,52 +5148,53 @@ static ssize_t slabs_cpu_partial_show(struct kmem_cache *s, char *buf) } } - len = sprintf(buf, "%d(%d)", objects, pages); + len += sysfs_emit_at(buf, len, "%d(%d)", objects, pages); #ifdef CONFIG_SMP for_each_online_cpu(cpu) { struct page *page; page = slub_percpu_partial(per_cpu_ptr(s->cpu_slab, cpu)); - - if (page && len < PAGE_SIZE - 20) - len += sprintf(buf + len, " C%d=%d(%d)", cpu, - page->pobjects, page->pages); + if (page) + len += sysfs_emit_at(buf, len, " C%d=%d(%d)", + cpu, page->pobjects, page->pages); } #endif - return len + sprintf(buf + len, "\n"); + len += sysfs_emit_at(buf, len, "\n"); + + return len; } SLAB_ATTR_RO(slabs_cpu_partial); static ssize_t reclaim_account_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_RECLAIM_ACCOUNT)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_RECLAIM_ACCOUNT)); } SLAB_ATTR_RO(reclaim_account); static ssize_t hwcache_align_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_HWCACHE_ALIGN)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_HWCACHE_ALIGN)); } SLAB_ATTR_RO(hwcache_align); #ifdef CONFIG_ZONE_DMA static ssize_t cache_dma_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_CACHE_DMA)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_CACHE_DMA)); } SLAB_ATTR_RO(cache_dma); #endif static ssize_t usersize_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", s->usersize); + return sysfs_emit(buf, "%u\n", s->usersize); } SLAB_ATTR_RO(usersize); static ssize_t destroy_by_rcu_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_TYPESAFE_BY_RCU)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_TYPESAFE_BY_RCU)); } SLAB_ATTR_RO(destroy_by_rcu); @@ -5214,33 +5213,33 @@ SLAB_ATTR_RO(total_objects); static ssize_t sanity_checks_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_CONSISTENCY_CHECKS)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_CONSISTENCY_CHECKS)); } SLAB_ATTR_RO(sanity_checks); static ssize_t trace_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_TRACE)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_TRACE)); } SLAB_ATTR_RO(trace); static ssize_t red_zone_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_RED_ZONE)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_RED_ZONE)); } SLAB_ATTR_RO(red_zone); static ssize_t poison_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_POISON)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_POISON)); } SLAB_ATTR_RO(poison); static ssize_t store_user_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_STORE_USER)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_STORE_USER)); } SLAB_ATTR_RO(store_user); @@ -5284,7 +5283,7 @@ SLAB_ATTR_RO(free_calls); #ifdef CONFIG_FAILSLAB static ssize_t failslab_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%d\n", !!(s->flags & SLAB_FAILSLAB)); + return sysfs_emit(buf, "%d\n", !!(s->flags & SLAB_FAILSLAB)); } SLAB_ATTR_RO(failslab); #endif @@ -5308,7 +5307,7 @@ SLAB_ATTR(shrink); #ifdef CONFIG_NUMA static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf) { - return sprintf(buf, "%u\n", s->remote_node_defrag_ratio / 10); + return sysfs_emit(buf, "%u\n", s->remote_node_defrag_ratio / 10); } static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s, @@ -5335,7 +5334,7 @@ static int show_stat(struct kmem_cache *s, char *buf, enum stat_item si) { unsigned long sum = 0; int cpu; - int len; + int len = 0; int *data = kmalloc_array(nr_cpu_ids, sizeof(int), GFP_KERNEL); if (!data) @@ -5348,16 +5347,19 @@ static int show_stat(struct kmem_cache *s, char *buf, enum stat_item si) sum += x; } - len = sprintf(buf, "%lu", sum); + len += sysfs_emit_at(buf, len, "%lu", sum); #ifdef CONFIG_SMP for_each_online_cpu(cpu) { - if (data[cpu] && len < PAGE_SIZE - 20) - len += sprintf(buf + len, " C%d=%u", cpu, data[cpu]); + if (data[cpu]) + len += sysfs_emit_at(buf, len, " C%d=%u", + cpu, data[cpu]); } #endif kfree(data); - return len + sprintf(buf + len, "\n"); + len += sysfs_emit_at(buf, len, "\n"); + + return len; } static void clear_stat(struct kmem_cache *s, enum stat_item si) |