linux-kernel - Re: [PATCH 2/7] mm: shrinker: Add a .to

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Message-ID: <ZWW6bInvMA2x3mHC@tiehlicka>
Date:   Tue, 28 Nov 2023 11:01:16 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Kent Overstreet <kent.overstreet@...ux.dev>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Qi Zheng <zhengqi.arch@...edance.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>
Subject: Re: [PATCH 2/7] mm: shrinker: Add a .to_text() method for shrinkers

On Wed 22-11-23 18:25:07, Kent Overstreet wrote:
[...]
> +void shrinkers_to_text(struct seq_buf *out)
> +{
> +	struct shrinker *shrinker;
> +	struct shrinker_by_mem {
> +		struct shrinker	*shrinker;
> +		unsigned long	mem;
> +	} shrinkers_by_mem[10];
> +	int i, nr = 0;
> +
> +	if (!mutex_trylock(&shrinker_mutex)) {
> +		seq_buf_puts(out, "(couldn't take shrinker lock)");
> +		return;
> +	}
> +
> +	list_for_each_entry(shrinker, &shrinker_list, list) {
> +		struct shrink_control sc = { .gfp_mask = GFP_KERNEL, };

This seems to be global reclaim specific. What about memcg reclaim?
-- 
Michal Hocko
SUSE Labs