Re: [patch 113/131] mm: balance LRU lists based on relative thrashing

[Alex Shi]

在 2020/6/4 上午7:03, Andrew Morton 写道:
>  
> +     /* XXX: Move to lru_cache_add() when it supports new vs putback */

Hi Hannes,

Sorry for a bit lost, would you like to explain a bit more of your idea here?

> +     spin_lock_irq(&page_pgdat(page)->lru_lock);
> +     lru_note_cost(page);
> +     spin_unlock_irq(&page_pgdat(page)->lru_lock);
> +


What could we see here w/o the lru_lock?

Thanks
Alex