diff options
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/mm/slub.c b/mm/slub.c index 7d2a996c307..d99acbf14e0 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -368,7 +368,7 @@ static inline bool __cmpxchg_double_slab(struct kmem_cache *s, struct page *page VM_BUG_ON(!irqs_disabled()); #ifdef CONFIG_CMPXCHG_DOUBLE if (s->flags & __CMPXCHG_DOUBLE) { - if (cmpxchg_double(&page->freelist, + if (cmpxchg_double(&page->freelist, &page->counters, freelist_old, counters_old, freelist_new, counters_new)) return 1; @@ -402,7 +402,7 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page, { #ifdef CONFIG_CMPXCHG_DOUBLE if (s->flags & __CMPXCHG_DOUBLE) { - if (cmpxchg_double(&page->freelist, + if (cmpxchg_double(&page->freelist, &page->counters, freelist_old, counters_old, freelist_new, counters_new)) return 1; @@ -1862,7 +1862,7 @@ static void unfreeze_partials(struct kmem_cache *s) { struct kmem_cache_node *n = NULL; struct kmem_cache_cpu *c = this_cpu_ptr(s->cpu_slab); - struct page *page; + struct page *page, *discard_page = NULL; while ((page = c->partial)) { enum slab_modes { M_PARTIAL, M_FREE }; @@ -1904,7 +1904,8 @@ static void unfreeze_partials(struct kmem_cache *s) if (l == M_PARTIAL) remove_partial(n, page); else - add_partial(n, page, 1); + add_partial(n, page, + DEACTIVATE_TO_TAIL); l = m; } @@ -1915,14 +1916,22 @@ static void unfreeze_partials(struct kmem_cache *s) "unfreezing slab")); if (m == M_FREE) { - stat(s, DEACTIVATE_EMPTY); - discard_slab(s, page); - stat(s, FREE_SLAB); + page->next = discard_page; + discard_page = page; } } if (n) spin_unlock(&n->list_lock); + + while (discard_page) { + page = discard_page; + discard_page = discard_page->next; + + stat(s, DEACTIVATE_EMPTY); + discard_slab(s, page); + stat(s, FREE_SLAB); + } } /* @@ -2295,7 +2304,7 @@ redo: * Since this is without lock semantics the protection is only against * code executing on this cpu *not* from access by other cpus. */ - if (unlikely(!irqsafe_cpu_cmpxchg_double( + if (unlikely(!this_cpu_cmpxchg_double( s->cpu_slab->freelist, s->cpu_slab->tid, object, tid, get_freepointer_safe(s, object), next_tid(tid)))) { @@ -2525,7 +2534,7 @@ redo: if (likely(page == c->page)) { set_freepointer(s, object, c->freelist); - if (unlikely(!irqsafe_cpu_cmpxchg_double( + if (unlikely(!this_cpu_cmpxchg_double( s->cpu_slab->freelist, s->cpu_slab->tid, c->freelist, tid, object, next_tid(tid)))) { @@ -3645,6 +3654,9 @@ void __init kmem_cache_init(void) struct kmem_cache *temp_kmem_cache_node; unsigned long kmalloc_size; + if (debug_guardpage_minorder()) + slub_max_order = 0; + kmem_size = offsetof(struct kmem_cache, node) + nr_node_ids * sizeof(struct kmem_cache_node *); @@ -4435,30 +4447,31 @@ static ssize_t show_slab_objects(struct kmem_cache *s, for_each_possible_cpu(cpu) { struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, cpu); + int node = ACCESS_ONCE(c->node); struct page *page; - if (!c || c->node < 0) + if (node < 0) continue; - - if (c->page) { - if (flags & SO_TOTAL) - x = c->page->objects; + page = ACCESS_ONCE(c->page); + if (page) { + if (flags & SO_TOTAL) + x = page->objects; else if (flags & SO_OBJECTS) - x = c->page->inuse; + x = page->inuse; else x = 1; total += x; - nodes[c->node] += x; + nodes[node] += x; } page = c->partial; if (page) { x = page->pobjects; - total += x; - nodes[c->node] += x; + total += x; + nodes[node] += x; } - per_cpu[c->node]++; + per_cpu[node]++; } } |