linux-kernel - Re: [PATCH 1/1] process_madvise.2: Add process

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Message-ID: <20210125131935.GI827@dhcp22.suse.cz>
Date:   Mon, 25 Jan 2021 14:19:35 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     linux-man@...r.kernel.org, akpm@...ux-foundation.org,
        jannh@...gle.com, keescook@...omium.org, jeffv@...gle.com,
        minchan@...nel.org, shakeelb@...gle.com, rientjes@...gle.com,
        edgararriaga@...gle.com, timmurray@...gle.com, linux-mm@...ck.org,
        selinux@...r.kernel.org, linux-security-module@...r.kernel.org,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH 1/1] process_madvise.2: Add process_madvise man page

On Wed 20-01-21 12:23:37, Suren Baghdasaryan wrote:
[...]
>     MADV_COLD (since Linux 5.4.1)
>         Deactivate a given range of pages by moving them from active to
>         inactive LRU list. This is done to accelerate the reclaim of these
>         pages. The advice might be ignored for some pages in the range when it
>         is not applicable.

I do not think we want to talk about active/inactive LRU lists here.
Wouldn't it be sufficient to say
Deactive a given range of pages which will make them a more probable
reclaim target should there be a memory pressure. This is a
non-destructive operation.

Other than that, looks good to me from the content POV.

Thanks!
-- 
Michal Hocko
SUSE Labs