linux-kernel - Re: [PATCH 1/2] x86/numa: Introduce numa_fill

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Message-ID: <8dc725c8-613a-b51b-6cc1-80d2275ca130@intel.com>
Date:   Thu, 18 May 2023 17:08:16 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     alison.schofield@...el.com,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Dave Jiang <dave.jiang@...el.com>
Cc:     x86@...nel.org, linux-cxl@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] x86/numa: Introduce numa_fill_memblks()

On 5/18/23 17:04, alison.schofield@...el.com wrote:
> The initial use case is the ACPI driver that needs to extend
> SRAT defined proximity domains to an entire CXL CFMWS Window[1].

Dumb question time: Why didn't the SRAT just cover this sucker in the
first place?  Are we fixing up a BIOS bug or is there a legitimate
reason that the SRAT didn't cover it up front?