linux-kernel - Re: [PATCH] of: Make the number of reserved memory regions configurable

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Message-ID: <20251027134842.GA274032-robh@kernel.org>
Date: Mon, 27 Oct 2025 08:48:42 -0500
From: Rob Herring <robh@...nel.org>
To: Maxime Ripard <mripard@...nel.org>
Cc: Saravana Kannan <saravanak@...gle.com>,
	Eric Chanudet <echanude@...hat.com>,
	Radu Rendec <rrendec@...hat.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] of: Make the number of reserved memory regions
 configurable

On Mon, Oct 27, 2025 at 11:02:39AM +0100, Maxime Ripard wrote:
> Hi Rob,
> 
> Thanks for your answer!
> 
> On Fri, Oct 24, 2025 at 07:57:06AM -0500, Rob Herring wrote:
> > On Thu, Oct 23, 2025 at 10:35 AM Maxime Ripard <mripard@...nel.org> wrote:
> > >
> > > Some platforms register more reserved memory regions than the current
> > > hardcoded limit of 64.
> > 
> > I've already NAKed a kconfig option for this before.
> > 
> > The limit is now 64 dynamic regions, not total. The static regions are
> > unlimited. What platform needs so many regions and to abuse
> > /reserved-memory like this?
> 
> I'm sorry, I totally missed both that you nacked it and that it got
> fixed recently. We're still seeing the issue with 6.12, but it looks like
> 
> https://lore.kernel.org/all/20241008220624.551309-1-quic_obabatun@quicinc.com/
> 
> Is the series you were talking about?

Yes. Plus some fixes on top of that. Every time this code is touched, we 
break someone...

Rob