Re: [PATCH] mm/vmscan: add sysctl knobs for protecting the working set

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On Tue, Nov 30, 2021 at 08:16:52PM +0900, Alexey Avramov wrote:
> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index 083be6af2..65fc38756 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -3132,6 +3132,27 @@ static struct ctl_table vm_table[] = {
>  	},
>  #endif
>  	{
> +		.procname	= "anon_min_kbytes",
> +		.data		= &sysctl_anon_min_kbytes,
> +		.maxlen		= sizeof(unsigned long),
> +		.mode		= 0644,
> +		.proc_handler	= proc_doulongvec_minmax,
> +	},
> +	{
> +		.procname	= "clean_low_kbytes",
> +		.data		= &sysctl_clean_low_kbytes,
> +		.maxlen		= sizeof(unsigned long),
> +		.mode		= 0644,
> +		.proc_handler	= proc_doulongvec_minmax,
> +	},
> +	{
> +		.procname	= "clean_min_kbytes",
> +		.data		= &sysctl_clean_min_kbytes,
> +		.maxlen		= sizeof(unsigned long),
> +		.mode		= 0644,
> +		.proc_handler	= proc_doulongvec_minmax,
> +	},
> +	{
>  		.procname	= "user_reserve_kbytes",
>  		.data		= &sysctl_user_reserve_kbytes,
>  		.maxlen		= sizeof(sysctl_user_reserve_kbytes),

Please don't clutter this file anymore than what we have with random
sysctls, as otherwise it becomes a pain to deal with merge conficts.
You can use register_sysctl_init("vm", whatever_your_local_table_name)
within the file you are adding your sysctl.

 Luis




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