On Wednesday, September 28, 2016 1:19 AM Tim Chen wrote
[...]
> +
> +static int alloc_swap_slot_cache(int cpu)
> +{
> + struct swap_slots_cache *cache;
> +
> + cache = &per_cpu(swp_slots, cpu);
> + mutex_init(&cache->alloc_lock);
> + spin_lock_init(&cache->free_lock);
> + cache->nr = 0;
> + cache->cur = 0;
> + cache->n_ret = 0;
> + cache->slots = vzalloc(sizeof(swp_entry_t) * SWAP_SLOTS_CACHE_SIZE);
> + if (!cache->slots) {
> + swap_slot_cache_enabled = false;
> + return -ENOMEM;
> + }
> + cache->slots_ret = vzalloc(sizeof(swp_entry_t) * SWAP_SLOTS_CACHE_SIZE);
> + if (!cache->slots_ret) {
> + vfree(cache->slots);
> + swap_slot_cache_enabled = false;
> + return -ENOMEM;
> + }
> + return 0;
> +}
> +
[...]
> +
> +static void free_slot_cache(int cpu)
> +{
> + struct swap_slots_cache *cache;
> +
> + mutex_lock(&swap_slots_cache_mutex);
> + drain_slots_cache_cpu(cpu, SLOTS_CACHE | SLOTS_CACHE_RET);
> + cache = &per_cpu(swp_slots, cpu);
> + cache->nr = 0;
> + cache->cur = 0;
> + cache->n_ret = 0;
> + vfree(cache->slots);
Also free cache->slots_ret?
Or fold the relevant two allocations into one?
> + mutex_unlock(&swap_slots_cache_mutex);
> +}
>
thanks
Hillf
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