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Date: Thu, 05 Mar 2026 00:59:52 +0100
Message-Id: <DGUEN4UNMUT0.3GQ73H7YWHQNL@kernel.org>
Subject: Re: [PATCH v3] gpu: nova-core: fix stack overflow in GSP memory
 allocation
Cc: <tim.kovalenko@proton.me>, "Alexandre Courbot" <acourbot@nvidia.com>,
 "Alice Ryhl" <aliceryhl@google.com>, "David Airlie" <airlied@gmail.com>,
 "Simona Vetter" <simona@ffwll.ch>, "Miguel Ojeda" <ojeda@kernel.org>,
 "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>, <nouveau@lists.freedesktop.org>,
 <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
 <rust-for-linux@vger.kernel.org>
To: "Tim Kovalenko via B4 Relay"
 <devnull+tim.kovalenko.proton.me@kernel.org>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260217-drm-rust-next-v3-1-9e7e95c597dc@proton.me>
In-Reply-To: <20260217-drm-rust-next-v3-1-9e7e95c597dc@proton.me>

On Wed Feb 18, 2026 at 5:01 AM CET, Tim Kovalenko via B4 Relay wrote:
> From: Tim Kovalenko <tim.kovalenko@proton.me>
>
> The `Cmdq::new` function was allocating a `PteArray` struct on the stack
> and was causing a stack overflow with 8216 bytes.
>
> Modify the `PteArray` to calculate and write the Page Table Entries
> directly into the coherent DMA buffer one-by-one. This reduces the stack
> usage quite a lot.
>
> Signed-off-by: Tim Kovalenko <tim.kovalenko@proton.me>

Can you please rebase your patch on top of [1] and use index projection?

[1] https://lore.kernel.org/rust-for-linux/20260302164239.284084-1-gary@ker=
nel.org/

Thanks,
Danilo