linux-kernel - Re: [PATCH v3 4/7] device-dax/kmem: Set node state as N_DEMOTION

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Message-ID: <CAAPL-u83O5W8B-G9xqZFWGuJNNc5nNkQ6iTVtJ-Gn01o4uFoPA@mail.gmail.com>
Date:   Fri, 22 Apr 2022 13:34:31 -0700
From:   Wei Xu <weixugc@...gle.com>
To:     Jagdish Gediya <jvgediya@...ux.ibm.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, baolin.wang@...ux.alibaba.com,
        dave.hansen@...ux.intel.com, ying.huang@...el.com,
        aneesh.kumar@...ux.ibm.com, shy828301@...il.com,
        gthelen@...gle.com, dan.j.williams@...el.com
Subject: Re: [PATCH v3 4/7] device-dax/kmem: Set node state as N_DEMOTION_TARGETS

On Fri, Apr 22, 2022 at 12:55 PM Jagdish Gediya <jvgediya@...ux.ibm.com> wrote:
>
> Set dax-device node as N_DEMOTION_TARGETS so that it
> can be used as demotion target.
>
> In future, support should be added to distinguish the
> dax-devices which are not preferred as demotion target
> e.g. HBM, for such devices, node shouldn't be set to
> N_DEMOTION_TARGETS.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
> Signed-off-by: Jagdish Gediya <jvgediya@...ux.ibm.com>
> ---

Acked-by: Wei Xu <weixugc@...gle.com>

>  drivers/dax/kmem.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
> index a37622060fff..f42ab9d04bdf 100644
> --- a/drivers/dax/kmem.c
> +++ b/drivers/dax/kmem.c
> @@ -147,6 +147,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
>
>         dev_set_drvdata(dev, data);
>
> +       node_set_state(numa_node, N_DEMOTION_TARGETS);
> +
>         return 0;
>
>  err_request_mem:
> --
> 2.35.1
>