linux-kernel - Re: [PATCH v2 2/4] workingset: refactor LRU refault to expose refault recency check

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Date:   Tue, 6 Dec 2022 15:22:55 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Nhat Pham <nphamcs@...il.com>
Cc:     akpm@...ux-foundation.org, hannes@...xchg.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, bfoster@...hat.com,
        kernel-team@...a.com
Subject: Re: [PATCH v2 2/4] workingset: refactor LRU refault to expose
 refault recency check

On Mon, Dec 05, 2022 at 09:51:38AM -0800, Nhat Pham wrote:
> +static bool lru_gen_test_recent(void *shadow, bool file, int *memcgid,
> +	struct pglist_data **pgdat, unsigned long *token, bool *workingset)

This line needs more than one tab indent.  I tend to use two tabs,
others try to line up the parameters with the opening '('.  But
one tab is too visually similar to the body of the function.

>  	rcu_read_lock();
> 
>  	memcg = folio_memcg_rcu(folio);
> +
> +	if (!lru_gen_test_recent(shadow, type, &memcg_id, &pgdat, &token,
> +		&workingset))

Similarly here.  &workingset looks like it's part of the body of the if,
not part of the function call.

> +		goto unlock;
> +
>  	if (memcg_id != mem_cgroup_id(memcg))
>  		goto unlock;
>