linux-kernel - Re: [PATCH 0/9] cxl: explicit DAX driver selection and hotplug

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Message-ID: <aXzrqYOmgo15NZ7s@gourry-fedora-PF4VCD3F>
Date: Fri, 30 Jan 2026 12:34:33 -0500
From: Gregory Price <gourry@...rry.net>
To: linux-mm@...ck.org
Cc: linux-cxl@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, kernel-team@...a.com, dave@...olabs.net,
	jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, vishal.l.verma@...el.com,
	ira.weiny@...el.com, dan.j.williams@...el.com, willy@...radead.org,
	jack@...e.cz, terry.bowman@....com, john@...alactic.com
Subject: Re: [PATCH 0/9] cxl: explicit DAX driver selection and hotplug

On Thu, Jan 29, 2026 at 04:04:33PM -0500, Gregory Price wrote:
> Currently, CXL regions that create DAX devices have no mechanism to
> control select the hotplug online policy for kmem regions at region
> creation time. Users must either rely on a build-time default or
> manually configure each memory block after hotplug occurs.
> 

Looks like build regression on configs without hotplug

MMOP_ defines and mhp_get_default_online_type() undefined

Will let this version sit for a bit before spinning a v2

~Gregory