linux-kernel - Re: [PATCH v2 1/2] x86/numa: Introduce numa_fill

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Message-ID: <ZIsxz6Swf54a66FN@aschofie-mobl2>
Date:   Thu, 15 Jun 2023 08:44:15 -0700
From:   Alison Schofield <alison.schofield@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     "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>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Mike Rapoport <rppt@...nel.org>, x86@...nel.org,
        linux-cxl@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Derick Marks <derick.w.marks@...el.com>
Subject: Re: [PATCH v2 1/2] x86/numa: Introduce numa_fill_memblks()

On Thu, Jun 15, 2023 at 10:34:07AM +0200, Peter Zijlstra wrote:
> On Tue, Jun 13, 2023 at 09:35:24PM -0700, alison.schofield@...el.com wrote:
> > From: Alison Schofield <alison.schofield@...el.com>
> > 
> > numa_fill_memblks() fills in the gaps in numa_meminfo memblks
> > over an HPA address range.
> 
> What's with the Host part, should that not simply be PA ?

Yes, it should be PA.

The HPA acronym usage is CXL-land language, where we qualify
qualify physical addresses as either HPAs and DPAs (Device),
seeping in needlessly.