linux-kernel - Re: [PATCH v5 08/27] cxl/mem: Read dynamic capacity configuration from the device

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Message-ID: <20241031002422.cu53abpaimetzrdx@offworld>
Date: Wed, 30 Oct 2024 17:24:22 -0700
From: Davidlohr Bueso <dave@...olabs.net>
To: ira.weiny@...el.com
Cc: Dave Jiang <dave.jiang@...el.com>, Fan Ni <fan.ni@...sung.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Navneet Singh <navneet.singh@...el.com>,
	Jonathan Corbet <corbet@....net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Alison Schofield <alison.schofield@...el.com>,
	Vishal Verma <vishal.l.verma@...el.com>, linux-cxl@...r.kernel.org,
	linux-doc@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Kees Cook <kees@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v5 08/27] cxl/mem: Read dynamic capacity configuration
 from the device

On Tue, 29 Oct 2024, ira.weiny@...el.com wrote:

>Linux has no use for the trailing fields of the Get Dynamic Capacity
>Configuration Output Payload (Total number of supported extents, number
>of available extents, total number of supported tags, and number of
>available tags).  Avoid defining those fields to use the more useful
>dynamic C array.

More of a general question, if anyone knows: why does the spec define
the fields in that order, and not put the region config structure(s)
at the end, as with all other cmds, afaik.