X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=mm%2Fslub.c;h=c3eb3d3ca83565b925e197f2ad44ac2c313345b8;hb=022a0e218704fe48eb15b7d0d0072cfaec5f2a82;hp=51df8272cfaf166dd9658b6e41c184fef1108b1c;hpb=9bf12df31f282e845b3dfaac1e5d5376a041da22;p=karo-tx-linux.git diff --git a/mm/slub.c b/mm/slub.c index 51df8272cfaf..c3eb3d3ca835 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -373,7 +373,8 @@ static inline bool __cmpxchg_double_slab(struct kmem_cache *s, struct page *page #endif { slab_lock(page); - if (page->freelist == freelist_old && page->counters == counters_old) { + if (page->freelist == freelist_old && + page->counters == counters_old) { page->freelist = freelist_new; page->counters = counters_new; slab_unlock(page); @@ -411,7 +412,8 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page, local_irq_save(flags); slab_lock(page); - if (page->freelist == freelist_old && page->counters == counters_old) { + if (page->freelist == freelist_old && + page->counters == counters_old) { page->freelist = freelist_new; page->counters = counters_new; slab_unlock(page); @@ -553,8 +555,9 @@ static void print_tracking(struct kmem_cache *s, void *object) static void print_page_info(struct page *page) { - printk(KERN_ERR "INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=0x%04lx\n", - page, page->objects, page->inuse, page->freelist, page->flags); + printk(KERN_ERR + "INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=0x%04lx\n", + page, page->objects, page->inuse, page->freelist, page->flags); } @@ -629,7 +632,8 @@ static void object_err(struct kmem_cache *s, struct page *page, print_trailer(s, page, object); } -static void slab_err(struct kmem_cache *s, struct page *page, const char *fmt, ...) +static void slab_err(struct kmem_cache *s, struct page *page, + const char *fmt, ...) { va_list args; char buf[100]; @@ -788,7 +792,8 @@ static int check_object(struct kmem_cache *s, struct page *page, } else { if ((s->flags & SLAB_POISON) && s->object_size < s->inuse) { check_bytes_and_report(s, page, p, "Alignment padding", - endobject, POISON_INUSE, s->inuse - s->object_size); + endobject, POISON_INUSE, + s->inuse - s->object_size); } } @@ -873,7 +878,6 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search) object_err(s, page, object, "Freechain corrupt"); set_freepointer(s, object, NULL); - break; } else { slab_err(s, page, "Freepointer corrupt"); page->freelist = NULL; @@ -918,7 +922,8 @@ static void trace(struct kmem_cache *s, struct page *page, void *object, page->freelist); if (!alloc) - print_section("Object ", (void *)object, s->object_size); + print_section("Object ", (void *)object, + s->object_size); dump_stack(); } @@ -937,7 +942,8 @@ static inline int slab_pre_alloc_hook(struct kmem_cache *s, gfp_t flags) return should_failslab(s->object_size, flags, s->flags); } -static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags, void *object) +static inline void slab_post_alloc_hook(struct kmem_cache *s, + gfp_t flags, void *object) { flags &= gfp_allowed_mask; kmemcheck_slab_alloc(s, flags, object, slab_ksize(s)); @@ -1039,7 +1045,8 @@ static void setup_object_debug(struct kmem_cache *s, struct page *page, init_tracking(s, object); } -static noinline int alloc_debug_processing(struct kmem_cache *s, struct page *page, +static noinline int alloc_debug_processing(struct kmem_cache *s, + struct page *page, void *object, unsigned long addr) { if (!check_slab(s, page)) @@ -1743,7 +1750,8 @@ static void init_kmem_cache_cpus(struct kmem_cache *s) /* * Remove the cpu slab */ -static void deactivate_slab(struct kmem_cache *s, struct page *page, void *freelist) +static void deactivate_slab(struct kmem_cache *s, struct page *page, + void *freelist) { enum slab_modes { M_NONE, M_PARTIAL, M_FULL, M_FREE }; struct kmem_cache_node *n = get_node(s, page_to_nid(page)); @@ -1999,7 +2007,8 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) page->pobjects = pobjects; page->next = oldpage; - } while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) != oldpage); + } while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) + != oldpage); #endif } @@ -2169,8 +2178,8 @@ static inline bool pfmemalloc_match(struct page *page, gfp_t gfpflags) } /* - * Check the page->freelist of a page and either transfer the freelist to the per cpu freelist - * or deactivate the page. + * Check the page->freelist of a page and either transfer the freelist to the + * per cpu freelist or deactivate the page. * * The page is still frozen if the return value is not NULL. * @@ -2314,7 +2323,8 @@ new_slab: goto load_freelist; /* Only entered in the debug case */ - if (kmem_cache_debug(s) && !alloc_debug_processing(s, page, freelist, addr)) + if (kmem_cache_debug(s) && + !alloc_debug_processing(s, page, freelist, addr)) goto new_slab; /* Slab failed checks. Next slab needed */ deactivate_slab(s, page, get_freepointer(s, freelist)); @@ -2372,7 +2382,7 @@ redo: object = c->freelist; page = c->page; - if (unlikely(!object || !page || !node_match(page, node))) + if (unlikely(!object || !node_match(page, node))) object = __slab_alloc(s, gfpflags, node, addr, c); else { @@ -2382,13 +2392,15 @@ redo: * The cmpxchg will only match if there was no additional * operation and if we are on the right processor. * - * The cmpxchg does the following atomically (without lock semantics!) + * The cmpxchg does the following atomically (without lock + * semantics!) * 1. Relocate first pointer to the current per cpu area. * 2. Verify that tid and freelist have not been changed * 3. If they were not changed replace tid and freelist * - * Since this is without lock semantics the protection is only against - * code executing on this cpu *not* from access by other cpus. + * Since this is without lock semantics the protection is only + * against code executing on this cpu *not* from access by + * other cpus. */ if (unlikely(!this_cpu_cmpxchg_double( s->cpu_slab->freelist, s->cpu_slab->tid, @@ -2420,7 +2432,8 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) { void *ret = slab_alloc(s, gfpflags, _RET_IP_); - trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size, s->size, gfpflags); + trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size, + s->size, gfpflags); return ret; } @@ -2434,14 +2447,6 @@ void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size) return ret; } EXPORT_SYMBOL(kmem_cache_alloc_trace); - -void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order) -{ - void *ret = kmalloc_order(size, flags, order); - trace_kmalloc(_RET_IP_, ret, size, PAGE_SIZE << order, flags); - return ret; -} -EXPORT_SYMBOL(kmalloc_order_trace); #endif #ifdef CONFIG_NUMA @@ -2512,8 +2517,10 @@ static void __slab_free(struct kmem_cache *s, struct page *page, if (kmem_cache_has_cpu_partial(s) && !prior) /* - * Slab was on no list before and will be partially empty - * We can defer the list move and instead freeze it. + * Slab was on no list before and will be + * partially empty + * We can defer the list move and instead + * freeze it. */ new.frozen = 1; @@ -3071,8 +3078,8 @@ static int kmem_cache_open(struct kmem_cache *s, unsigned long flags) * A) The number of objects from per cpu partial slabs dumped to the * per node list when we reach the limit. * B) The number of objects in cpu partial slabs to extract from the - * per node list when we run out of per cpu objects. We only fetch 50% - * to keep some capacity around for frees. + * 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_has_cpu_partial(s)) s->cpu_partial = 0; @@ -3099,8 +3106,8 @@ error: if (flags & SLAB_PANIC) panic("Cannot create slab %s size=%lu realsize=%u " "order=%u offset=%u flags=%lx\n", - s->name, (unsigned long)s->size, s->size, oo_order(s->oo), - s->offset, flags); + s->name, (unsigned long)s->size, s->size, + oo_order(s->oo), s->offset, flags); return -EINVAL; } @@ -3316,42 +3323,6 @@ size_t ksize(const void *object) } EXPORT_SYMBOL(ksize); -#ifdef CONFIG_SLUB_DEBUG -bool verify_mem_not_deleted(const void *x) -{ - struct page *page; - void *object = (void *)x; - unsigned long flags; - bool rv; - - if (unlikely(ZERO_OR_NULL_PTR(x))) - return false; - - local_irq_save(flags); - - page = virt_to_head_page(x); - if (unlikely(!PageSlab(page))) { - /* maybe it was from stack? */ - rv = true; - goto out_unlock; - } - - slab_lock(page); - if (on_freelist(page->slab_cache, page, object)) { - object_err(page->slab_cache, page, object, "Object is on free-list"); - rv = false; - } else { - rv = true; - } - slab_unlock(page); - -out_unlock: - local_irq_restore(flags); - return rv; -} -EXPORT_SYMBOL(verify_mem_not_deleted); -#endif - void kfree(const void *x) { struct page *page; @@ -4162,15 +4133,17 @@ static int list_locations(struct kmem_cache *s, char *buf, !cpumask_empty(to_cpumask(l->cpus)) && len < PAGE_SIZE - 60) { len += sprintf(buf + len, " cpus="); - len += cpulist_scnprintf(buf + len, PAGE_SIZE - len - 50, + len += cpulist_scnprintf(buf + len, + PAGE_SIZE - len - 50, to_cpumask(l->cpus)); } if (nr_online_nodes > 1 && !nodes_empty(l->nodes) && len < PAGE_SIZE - 60) { len += sprintf(buf + len, " nodes="); - len += nodelist_scnprintf(buf + len, PAGE_SIZE - len - 50, - l->nodes); + len += nodelist_scnprintf(buf + len, + PAGE_SIZE - len - 50, + l->nodes); } len += sprintf(buf + len, "\n"); @@ -4268,18 +4241,17 @@ static ssize_t show_slab_objects(struct kmem_cache *s, int node; int x; unsigned long *nodes; - unsigned long *per_cpu; - nodes = kzalloc(2 * sizeof(unsigned long) * nr_node_ids, GFP_KERNEL); + nodes = kzalloc(sizeof(unsigned long) * nr_node_ids, GFP_KERNEL); if (!nodes) return -ENOMEM; - per_cpu = nodes + nr_node_ids; if (flags & SO_CPU) { int cpu; for_each_possible_cpu(cpu) { - struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, cpu); + struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, + cpu); int node; struct page *page; @@ -4304,8 +4276,6 @@ static ssize_t show_slab_objects(struct kmem_cache *s, total += x; nodes[node] += x; } - - per_cpu[node]++; } } @@ -4315,12 +4285,11 @@ static ssize_t show_slab_objects(struct kmem_cache *s, for_each_node_state(node, N_NORMAL_MEMORY) { struct kmem_cache_node *n = get_node(s, node); - if (flags & SO_TOTAL) - x = atomic_long_read(&n->total_objects); - else if (flags & SO_OBJECTS) - x = atomic_long_read(&n->total_objects) - - count_partial(n, count_free); - + if (flags & SO_TOTAL) + x = atomic_long_read(&n->total_objects); + else if (flags & SO_OBJECTS) + x = atomic_long_read(&n->total_objects) - + count_partial(n, count_free); else x = atomic_long_read(&n->nr_slabs); total += x; @@ -5136,7 +5105,8 @@ static char *create_unique_id(struct kmem_cache *s) #ifdef CONFIG_MEMCG_KMEM if (!is_root_cache(s)) - p += sprintf(p, "-%08d", memcg_cache_id(s->memcg_params->memcg)); + p += sprintf(p, "-%08d", + memcg_cache_id(s->memcg_params->memcg)); #endif BUG_ON(p > name + ID_STR_LENGTH - 1);