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From:   "Huang, Ying" <ying.huang@intel.com>
To:     Yu Zhao <yuzhao@google.com>
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Subject: Re: [PATCH v9 05/14] mm: multi-gen LRU: groundwork
References: <20220309021230.721028-1-yuzhao@google.com>
        <20220309021230.721028-6-yuzhao@google.com>
Date:   Mon, 14 Mar 2022 16:08:53 +0800
In-Reply-To: <20220309021230.721028-6-yuzhao@google.com> (Yu Zhao's message of
        "Tue, 8 Mar 2022 19:12:22 -0700")
Message-ID: <875yoh552i.fsf@yhuang6-desk2.ccr.corp.intel.com>
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Hi, Yu,

Yu Zhao <yuzhao@google.com> writes:
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 3326ee3903f3..747ab1690bcf 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -892,6 +892,16 @@ config ANON_VMA_NAME
>  	  area from being merged with adjacent virtual memory areas due to the
>  	  difference in their name.
>  
> +# the multi-gen LRU {
> +config LRU_GEN
> +	bool "Multi-Gen LRU"
> +	depends on MMU
> +	# the following options can use up the spare bits in page flags
> +	depends on !MAXSMP && (64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP)

LRU_GEN depends on !MAXSMP.  So, What is the maximum NR_CPUS supported
by LRU_GEN?

> +	help
> +	  A high performance LRU implementation for memory overcommit.
> +# }
> +
>  source "mm/damon/Kconfig"
>  
>  endmenu

Best Regards,
Huang, Ying

[snip]