linux-kernel - Re: [PATCH v3 3/6] rust: gpuvm: add GpuVm::obtain()

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Message-ID: <CAH5fLggFzHSB-iassPmwkP74h6qN6V6hYaCfjT0_JEvGoDecBQ@mail.gmail.com>
Date: Mon, 26 Jan 2026 16:07:30 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Boris Brezillon <boris.brezillon@...labora.com>
Cc: Danilo Krummrich <dakr@...nel.org>, Daniel Almeida <daniel.almeida@...labora.com>, 
	Janne Grunau <j@...nau.net>, Matthew Brost <matthew.brost@...el.com>, 
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>, 
	Lyude Paul <lyude@...hat.com>, Asahi Lina <lina+kernel@...hilina.net>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v3 3/6] rust: gpuvm: add GpuVm::obtain()

On Mon, Jan 26, 2026 at 4:00 PM Boris Brezillon
<boris.brezillon@...labora.com> wrote:
>
> On Wed, 21 Jan 2026 11:31:19 +0000
> Alice Ryhl <aliceryhl@...gle.com> wrote:
>
> > +/// A [`GpuVmBo`] object in the GEM list.
> > +///
> > +/// # Invariants
> > +///
> > +/// Points at a `drm_gpuvm_bo` that contains a valid `T::VmBoData` and is present in the gem list.
> > +pub struct GpuVmBoResident<T: DriverGpuVm>(NonNull<GpuVmBo<T>>);
>
> I find the name a bit confusing: BO residency is often used to refer to
> memory backing the buffer object, and in this case, you can end up with
> a GpuVmBoResident being returned for a BO that has been evicted (one
> that's no longer resident).

Good point. I meant it as "present in list" but I guess there are
other things a gpuvm may be present in.

Any naming suggestions?

Alice