linux-kernel - Re: [PATCH v2 1/9] mm: Introduce Data Access MONitor (DAMON)

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Message-ID: <95f6d1e3-7052-252e-1c29-f320e84df302@infradead.org>
Date:   Tue, 28 Jan 2020 08:06:38 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     sjpark@...zon.com, akpm@...ux-foundation.org
Cc:     SeongJae Park <sjpark@...zon.de>, sj38.park@...il.com,
        acme@...nel.org, amit@...nel.org, brendan.d.gregg@...il.com,
        corbet@....net, dwmw@...zon.com, mgorman@...e.de,
        rostedt@...dmis.org, kirill@...temov.name,
        brendanhiggins@...gle.com, colin.king@...onical.com,
        minchan@...nel.org, vdavydov.dev@...il.com, vdavydov@...allels.com,
        linux-mm@...ck.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/9] mm: Introduce Data Access MONitor (DAMON)

On 1/28/20 12:57 AM, sjpark@...zon.com wrote:
> diff --git a/mm/Kconfig b/mm/Kconfig
> index ab80933be65f..144fb916aa8b 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -739,4 +739,16 @@ config ARCH_HAS_HUGEPD
>  config MAPPING_DIRTY_HELPERS
>          bool
>  
> +config DAMON
> +	tristate "Data Access Monitor"
> +	depends on MMU
> +	default y

Might be lightweight but still should not default to 'y'.

> +	help
> +	  Provides data access monitoring.
> +
> +	  DAMON is a kernel module that allows users to monitor the actual
> +	  memory access pattern of specific user-space processes.  It aims to
> +	  be 1) accurate enough to be useful for performance-centric domains,
> +	  and 2) sufficiently light-weight so that it can be applied online.
> +
>  endmenu

thanks.
-- 
~Randy