linux-kernel - Re: [PATCH v2 01/11] cgroup/cpuset-v1: Add deprecation messages to sched_load_balance and memory_pressure

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Message-ID: <1959b178-5c3d-4564-beb3-f411cb9efe77@redhat.com>
Date: Tue, 11 Mar 2025 10:02:14 -0400
From: Waiman Long <llong@...hat.com>
To: Michal Koutný <mkoutny@...e.com>,
 cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v2 01/11] cgroup/cpuset-v1: Add deprecation messages to
 sched_load_balance and memory_pressure_enabled

On 3/11/25 8:36 AM, Michal Koutný wrote:
> These two v1 feature have analogues in cgroup v2.
>
> Signed-off-by: Michal Koutný <mkoutny@...e.com>
> ---
>   kernel/cgroup/cpuset-v1.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/kernel/cgroup/cpuset-v1.c b/kernel/cgroup/cpuset-v1.c
> index 25c1d7b77e2f2..9d47b20c03c4b 100644
> --- a/kernel/cgroup/cpuset-v1.c
> +++ b/kernel/cgroup/cpuset-v1.c
> @@ -430,12 +430,14 @@ static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
>   		retval = cpuset_update_flag(CS_MEM_HARDWALL, cs, val);
>   		break;
>   	case FILE_SCHED_LOAD_BALANCE:
> +		pr_info_once("cpuset.%s is deprecated, use cpuset.cpus.partition instead\n", cft->name);
>   		retval = cpuset_update_flag(CS_SCHED_LOAD_BALANCE, cs, val);
>   		break;
>   	case FILE_MEMORY_MIGRATE:
>   		retval = cpuset_update_flag(CS_MEMORY_MIGRATE, cs, val);
>   		break;
>   	case FILE_MEMORY_PRESSURE_ENABLED:
> +		pr_info_once("cpuset.%s is deprecated, use memory.pressure with CONFIG_PSI instead\n", cft->name);
>   		cpuset_memory_pressure_enabled = !!val;
>   		break;
>   	case FILE_SPREAD_PAGE:
Acked-by: Waiman Long <longman@...hat.com>