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Date: Wed, 11 Feb 2026 00:23:29 +0100
Message-Id: <DGBO3AS8VHIZ.1UNQTIMO8BGAG@kernel.org>
Subject: Re: [PATCH -next v8 2/3] rust: gpu: Add GPU buddy allocator
 bindings
Cc: <linux-kernel@vger.kernel.org>, "Maarten Lankhorst"
 <maarten.lankhorst@linux.intel.com>, "Maxime Ripard" <mripard@kernel.org>,
 "Thomas Zimmermann" <tzimmermann@suse.de>, "David Airlie"
 <airlied@gmail.com>, "Simona Vetter" <simona@ffwll.ch>, "Jonathan Corbet"
 <corbet@lwn.net>, "Alex Deucher" <alexander.deucher@amd.com>,
 =?utf-8?q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>, "Jani Nikula"
 <jani.nikula@linux.intel.com>, "Joonas Lahtinen"
 <joonas.lahtinen@linux.intel.com>, "Vivi Rodrigo" <rodrigo.vivi@intel.com>,
 "Tvrtko Ursulin" <tursulin@ursulin.net>, "Rui Huang" <ray.huang@amd.com>,
 "Matthew Auld" <matthew.auld@intel.com>, "Matthew Brost"
 <matthew.brost@intel.com>, "Lucas De Marchi" <lucas.demarchi@intel.com>,
 =?utf-8?q?Thomas_Hellstr=C3=B6m?= <thomas.hellstrom@linux.intel.com>,
 "Helge Deller" <deller@gmx.de>, "Alice Ryhl" <aliceryhl@google.com>,
 "Miguel Ojeda" <ojeda@kernel.org>, "Alex Gaynor" <alex.gaynor@gmail.com>,
 "Boqun Feng" <boqun.feng@gmail.com>, "Gary Guo" <gary@garyguo.net>,
 =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>, "Benno Lossin"
 <lossin@kernel.org>, "Andreas Hindborg" <a.hindborg@kernel.org>, "Trevor
 Gross" <tmgross@umich.edu>, "John Hubbard" <jhubbard@nvidia.com>, "Alistair
 Popple" <apopple@nvidia.com>, "Timur Tabi" <ttabi@nvidia.com>, "Edwin Peer"
 <epeer@nvidia.com>, "Alexandre Courbot" <acourbot@nvidia.com>, "Andrea
 Righi" <arighi@nvidia.com>, "Andy Ritger" <aritger@nvidia.com>, "Zhi Wang"
 <zhiw@nvidia.com>, "Balbir Singh" <balbirs@nvidia.com>, "Philipp Stanner"
 <phasta@kernel.org>, "Elle Rhumsaa" <elle@weathered-steel.dev>, "Daniel
 Almeida" <daniel.almeida@collabora.com>, <joel@joelfernandes.org>,
 <nouveau@lists.freedesktop.org>, <dri-devel@lists.freedesktop.org>,
 <rust-for-linux@vger.kernel.org>, <linux-doc@vger.kernel.org>,
 <amd-gfx@lists.freedesktop.org>, <intel-gfx@lists.freedesktop.org>,
 <intel-xe@lists.freedesktop.org>, <linux-fbdev@vger.kernel.org>
To: "Joel Fernandes" <joelagnelf@nvidia.com>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260209214246.2783990-1-joelagnelf@nvidia.com>
 <20260209214246.2783990-3-joelagnelf@nvidia.com>
 <DGB9G697GSWO.3VBFGU5MKFPMR@kernel.org>
 <1770754015.1979311.8126@nvidia.com> <DGBL94I0E5UB.4LNH3JODOKPV@kernel.org>
 <a7140f1d-b4de-412d-88a5-90e76d2200e3@nvidia.com>
In-Reply-To: <a7140f1d-b4de-412d-88a5-90e76d2200e3@nvidia.com>

On Tue Feb 10, 2026 at 11:06 PM CET, Joel Fernandes wrote:
> I wasn't implying to give reason to go for more allocations, it is about =
a
> reference to the same allocation that may be required to be shared from m=
ultiple
> objects for whatever reason. But again, currently we don't have a use cas=
e for that.

Sure, I just mentioned it since returning an Arc instead of an impl PinInit
removes the option for drivers to embed additional driver specific data int=
o the
same allocation, i.e. it might set the wrong incentive.