linux-kernel - Re: [PATCH v4 6/7] ACPI/NUMA: Add log messages for memory ranges found in CEDT

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Date: Wed, 24 Apr 2024 10:54:22 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: Robert Richter <rrichter@....com>, "Rafael J. Wysocki" <rafael@...nel.org>
CC: Dave Hansen <dave.hansen@...ux.intel.com>, Dan Williams
	<dan.j.williams@...el.com>, Alison Schofield <alison.schofield@...el.com>,
	<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-cxl@...r.kernel.org>, Robert Richter <rrichter@....com>, Len Brown
	<lenb@...nel.org>
Subject: Re: [PATCH v4 6/7] ACPI/NUMA: Add log messages for memory ranges
 found in CEDT

Robert Richter wrote:
> Adding a pr_info() when successfully adding a CFMWS memory range.
> 
> Suggested-by: Alison Schofield <alison.schofield@...el.com>
> Signed-off-by: Robert Richter <rrichter@....com>
> ---
>  drivers/acpi/numa/srat.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
> index e3f26e71637a..c62e4636e472 100644
> --- a/drivers/acpi/numa/srat.c
> +++ b/drivers/acpi/numa/srat.c
> @@ -338,8 +338,11 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
>  	 * found for any portion of the window to cover the entire
>  	 * window.
>  	 */
> -	if (!numa_fill_memblks(start, end))
> +	if (!numa_fill_memblks(start, end)) {
> +		pr_info("CEDT: memblk extended [mem %#010Lx-%#010Lx]\n",
> +			(unsigned long long) start, (unsigned long long) end - 1);

This looks like pr_debug() material to me.

>  		return 0;
> +	}
>  
>  	/* No SRAT description. Create a new node. */
>  	node = acpi_map_pxm_to_node(*fake_pxm);
> @@ -354,8 +357,13 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
>  		pr_warn("ACPI NUMA: Failed to add memblk for CFMWS node %d [mem %#llx-%#llx]\n",
>  			node, start, end);
>  	}
> +
>  	node_set(node, numa_nodes_parsed);
>  
> +	pr_info("CEDT: Node %u PXM %u [mem %#010Lx-%#010Lx]\n",
> +		node, *fake_pxm,
> +		(unsigned long long) start, (unsigned long long) end - 1);
> +

This makes sense to mirror the SRAT pr_info().