| Hi linux-mm I find one odd variable “new” in slub, it was used before init. Maybe the value in new was undefined. And I can not understand how it work. Could you explain this code for me? Thanks. Best regards. static void __slab_free(struct kmem_cache *s, struct page *page, void *head, void *tail, int cnt, unsigned long addr) { void *prior; int was_frozen; struct page new; unsigned long counters; struct kmem_cache_node *n = NULL; unsigned long flags; stat(s, FREE_SLOWPATH); if (kmem_cache_debug(s) && !free_debug_processing(s, page, head, tail, cnt, addr)) return; do { if (unlikely(n)) { spin_unlock_irqrestore(&n->list_lock, flags); n = NULL; } prior = page->freelist; counters = page->counters; set_freepointer(s, tail, prior); new.counters = counters; was_frozen = new.frozen; new.inuse -= cnt; if ((!new.inuse || !prior) && !was_frozen) { |
