linux-kernel - RE: [PATCH v2 6/6] ACPI: RISCV: Enable ACPI based NUMA

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Date: Mon, 1 Apr 2024 16:57:30 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: Haibo Xu <xiaobo55x@...il.com>, Sunil V L <sunilvl@...tanamicro.com>
CC: "Xu, Haibo1" <haibo1.xu@...el.com>, "ajones@...tanamicro.com"
	<ajones@...tanamicro.com>, Paul Walmsley <paul.walmsley@...ive.com>, "Palmer
 Dabbelt" <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, "Rafael J.
 Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, "Moore, Robert"
	<robert.moore@...el.com>, Conor Dooley <conor.dooley@...rochip.com>, Guo Ren
	<guoren@...nel.org>, Alexandre Ghiti <alexghiti@...osinc.com>, Greentime Hu
	<greentime.hu@...ive.com>, Charlie Jenkins <charlie@...osinc.com>, "Sami
 Tolvanen" <samitolvanen@...gle.com>, Zong Li <zong.li@...ive.com>, "Jisheng
 Zhang" <jszhang@...nel.org>, Baoquan He <bhe@...hat.com>,
	Clément Léger <cleger@...osinc.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Chen Jiahao <chenjiahao16@...wei.com>, "Arnd
 Bergmann" <arnd@...db.de>, James Morse <james.morse@....com>, "Russell King
 (Oracle)" <rmk+kernel@...linux.org.uk>, Evan Green <evan@...osinc.com>,
	Samuel Holland <samuel.holland@...ive.com>, Marc Zyngier <maz@...nel.org>,
	Anup Patel <apatel@...tanamicro.com>, Ard Biesheuvel <ardb@...nel.org>,
	Yuntao Wang <ytcoode@...il.com>, "Schofield, Alison"
	<alison.schofield@...el.com>, Dave Hansen <dave.hansen@...ux.intel.com>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"acpica-devel@...ts.linux.dev" <acpica-devel@...ts.linux.dev>
Subject: RE: [PATCH v2 6/6] ACPI: RISCV: Enable ACPI based NUMA

>> If the firmware didn't provide the SRAT/SLIT on ACPI based systems, then
>> there will be a message "Failed to initialise from firmware" from
>> arch_acpi_numa_init(). This is not specific to RISC-V. But I am
>> wondering why should it be pr_info instead of pr_debug.
>>
>
> My understanding is maybe it just wants to expose explicit logs to
> avoid any potential bugs from FW or Kernel.

There are lots of ACPI enabled systems that aren't NUMA (single
socket servers, desktops, laptops). Making this "pr_info()" would just
add noise to the boot on all of those.

-Tony