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Date: Thu, 6 Jun 2024 11:04:30 -0700
From: "Paul E. McKenney" <paulmck@kernel.org>
To: Jan Beulich <jbeulich@suse.com>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>,
	open list <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>, lkft-triage@lists.linaro.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Rapoport <rppt@kernel.org>,
	Dan Carpenter <dan.carpenter@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: x86: WARNING: at mm/memblock.c:1339 memblock_set_node - Usage of
 MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead
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On Thu, Jun 06, 2024 at 07:19:40AM -0700, Paul E. McKenney wrote:
> On Thu, Jun 06, 2024 at 08:13:17AM +0200, Jan Beulich wrote:
> > On 05.06.2024 22:48, Paul E. McKenney wrote:
> > > On Wed, Jun 05, 2024 at 09:46:37PM +0200, Jan Beulich wrote:
> > >> On 05.06.2024 21:07, Paul E. McKenney wrote:
> > >>> On Mon, Jun 03, 2024 at 07:19:21PM +0530, Naresh Kamboju wrote:
> > >>>> The following kernel warnings are noticed on x86 devices while booting
> > >>>> the Linux next-20240603 tag and looks like it is expected to warn users to
> > >>>> use NUMA_NO_NODE instead.
> > >>>>
> > >>>> Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead
> > >>>>
> > >>>> The following config is enabled
> > >>>> CONFIG_NUMA=y
> > >>>
> > >>> I am seeing this as well.  Is the following commit premature?
> > >>>
> > >>> e0eec24e2e19 ("memblock: make memblock_set_node() also warn about use of MAX_NUMNODES")
> > >>>
> > >>> Maybe old ACPI tables and device trees need to catch up?
> > >>>
> > >>> Left to myself, I would simply remove the WARN_ON_ONCE() from the above
> > >>> commit, but I would guess that there is a better way.
> > >>
> > >> Well, the warning is issued precisely to make clear that call
> > >> sites need to change. A patch to do so for the two instances
> > >> on x86 that I'm aware of is already pending maintainer approval.
> > > 
> > > Could you please point me at that patch so that I can stop repeatedly
> > > reproducing those two particular issues?
> > 
> > https://lore.kernel.org/lkml/abadb736-a239-49e4-ab42-ace7acdd4278@suse.com/
> 
> Thank you, Jan!
> 
> A quick initial test shows that this clears things up.  I have started
> a longer test to check for additional issues.  But in the meantime
> for the issues I was already seeing in the initial test:
> 
> Tested-by: Paul E. McKenney <paulmck@kernel.org>

And the longer test ran without errors as well, so again, thank you!

Any chance of getting this into -next sooner rather than later?

							Thanx, Paul