linux-kernel - Re: [PATCH v3 2/3] mm: page_counters: put page_counter_calculate_protection() under CONFIG

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Message-ID: <20240726230911.GE1702603@cmpxchg.org>
Date: Fri, 26 Jul 2024 19:09:11 -0400
From: Johannes Weiner <hannes@...xchg.org>
To: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...nel.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>
Subject: Re: [PATCH v3 2/3] mm: page_counters: put
 page_counter_calculate_protection() under CONFIG_MEMCG

On Fri, Jul 26, 2024 at 08:31:09PM +0000, Roman Gushchin wrote:
> Put page_counter_calculate_protection() under CONFIG_MEMCG.
> 
> The protection functionality (min/low limits) is not supported by any
> other cgroup subsystem, so page_counter_calculate_protection() and
> related static effective_protection() can be compiled out if
> CONFIG_MEMCG is not enabled.
> 
> Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>
> Acked-by: Shakeel Butt <shakeel.butt@...ux.dev>

Acked-by: Johannes Weiner <hannes@...xchg.org>