quarantine

void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache)
{
    unsigned long flags;
    struct qlist_head *q;
    struct qlist_head temp = QLIST_INIT;
 
    /*
     * Note: irq must be disabled until after we move the batch to the
     * global quarantine. Otherwise quarantine_remove_cache() can miss
     * some objects belonging to the cache if they are in our local temp
     * list. quarantine_remove_cache() executes on_each_cpu() at the
     * beginning which ensures that it either sees the objects in per-cpu
     * lists or in the global quarantine.
     */
    local_irq_save(flags);
 
    q = this_cpu_ptr(&cpu_quarantine);
    qlist_put(q, &info->quarantine_link, cache->size);
    if (unlikely(q->bytes > QUARANTINE_PERCPU_SIZE)) {
        qlist_move_all(q, &temp);
 
        raw_spin_lock(&quarantine_lock);
        WRITE_ONCE(quarantine_size, quarantine_size + temp.bytes);
        qlist_move_all(&temp, &global_quarantine[quarantine_tail]);
        if (global_quarantine[quarantine_tail].bytes >=
                READ_ONCE(quarantine_batch_size)) {
            int new_tail;
 
            new_tail = quarantine_tail + 1;
            if (new_tail == QUARANTINE_BATCHES)
                new_tail = 0;
            if (new_tail != quarantine_head)
                quarantine_tail = new_tail;
        }
        raw_spin_unlock(&quarantine_lock);
    }
 
    local_irq_restore(flags);
}
函数源码
