linux-kernel - Re: [PATCH 2/2] mm: memcg: add cache line padding to mem_cgroup_per

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Message-ID: <do4voq2q2ixruqfe4xydinkfvoxvv6mxw5homf75arwqxn2p5t@hqsar2jsm2wg>
Date: Mon, 1 Jul 2024 12:17:16 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>, 
	Michal Hocko <mhocko@...nel.org>, Muchun Song <muchun.song@...ux.dev>
Subject: Re: [PATCH 2/2] mm: memcg: add cache line padding to
 mem_cgroup_per_node

On Mon, Jul 01, 2024 at 06:59:32PM GMT, Roman Gushchin wrote:
> Memcg v1-specific fields serve a buffer function between read-mostly
> and update often parts of the mem_cgroup_per_node structure.
> If CONFIG_MEMCG_V1 is not set and these fields are not present,
> an explicit cacheline padding is needed.
> 
> Suggested-by: Shakeel Butt <shakeel.butt@...ux.dev>
> Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>

Acked-by: Shakeel Butt <shakeel.butt@...ux.dev>