linux-kernel - Re: [PATCH v3 03/26] MIPS: sgi-ip27: ensure node_possible

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Message-ID: <20240801184452.00007d30@Huawei.com>
Date: Thu, 1 Aug 2024 18:44:52 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Mike Rapoport <rppt@...nel.org>
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Subject: Re: [PATCH v3 03/26] MIPS: sgi-ip27: ensure node_possible_map only
 contains valid nodes

On Thu,  1 Aug 2024 09:08:03 +0300
Mike Rapoport <rppt@...nel.org> wrote:

> From: "Mike Rapoport (Microsoft)" <rppt@...nel.org>
> 
> For SGI IP27 machines node_possible_map is statically set to
> NODE_MASK_ALL and it is not updated during NUMA initialization.
> 
> Ensure that it only contains nodes present in the system.
> 
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  arch/mips/sgi-ip27/ip27-smp.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/mips/sgi-ip27/ip27-smp.c b/arch/mips/sgi-ip27/ip27-smp.c
> index 5d2652a1d35a..62733e049570 100644
> --- a/arch/mips/sgi-ip27/ip27-smp.c
> +++ b/arch/mips/sgi-ip27/ip27-smp.c
> @@ -70,11 +70,13 @@ void cpu_node_probe(void)
>  	gda_t *gdap = GDA;
>  
>  	nodes_clear(node_online_map);
> +	nodes_clear(node_possible_map);
>  	for (i = 0; i < MAX_NUMNODES; i++) {
>  		nasid_t nasid = gdap->g_nasidtable[i];
>  		if (nasid == INVALID_NASID)
>  			break;
>  		node_set_online(nasid);
> +		node_set(nasid, node_possible_map);
>  		highest = node_scan_cpus(nasid, highest);
>  	}
>