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Date: Mon, 17 Aug 2026 13:18:05 +0200
Message-Id: <DKR6EB8OWPXG.2QYAY81UG1RF3@kernel.org>
Subject: Re: [PATCH v5 5/5] gpu: nova-core: add ChannelIdPool
Cc: "Eliot Courtney" <ecourtney@nvidia.com>, "Yury Norov"
 <ynorov@nvidia.com>, "Alice Ryhl" <aliceryhl@google.com>, "Burak Emir"
 <burak.emir@gmail.com>, "Yury Norov" <yury.norov@gmail.com>, "Miguel Ojeda"
 <ojeda@kernel.org>, "Boqun Feng" <boqun@kernel.org>,
 =?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>, "Daniel Almeida"
 <daniel.almeida@collabora.com>, "Tamir Duberstein" <tamird@kernel.org>,
 "Alexandre Courbot" <acourbot@nvidia.com>, =?utf-8?q?Onur_=C3=96zkan?=
 <work@onurozkan.dev>, "David Airlie" <airlied@gmail.com>, "Simona Vetter"
 <simona@ffwll.ch>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "John
 Hubbard" <jhubbard@nvidia.com>, "Alistair Popple" <apopple@nvidia.com>,
 "Timur Tabi" <ttabi@nvidia.com>, "Zhi Wang" <zhiw@nvidia.com>,
 <rust-for-linux@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
 <nova-gpu@lists.linux.dev>, <dri-devel@lists.freedesktop.org>, "dri-devel"
 <dri-devel-bounces@lists.freedesktop.org>
To: "Gary Guo" <gary@garyguo.net>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260812-chid-v5-0-6c767770b3f4@nvidia.com>
 <20260812-chid-v5-5-6c767770b3f4@nvidia.com> <anzxKO0X1OrNRD32@yury>
 <DKNN2LHZXRIH.5LUX95CZ8EA7@nvidia.com> <an4NvQBt3389jP6E@yury>
 <DKO414SNC0B2.248FUBGJGSPLU@kernel.org> <an4xDp29VX8Am0uR@yury>
 <DKOAY7J1IFTP.DMKSXK625EW5@nvidia.com>
 <DKOECWHEEAK1.3N3JXH9MH7Q58@nvidia.com> <an7bG2bEd28AbNRr@yury>
 <an8r4VECQ8iFP8ze@yury> <DKR0ZNGYW9IT.37N7TEN97GG3N@nvidia.com>
 <DKR5W5DGAWAJ.38LHLLNPO9R4W@garyguo.net>
In-Reply-To: <DKR5W5DGAWAJ.38LHLLNPO9R4W@garyguo.net>

On Mon Aug 17, 2026 at 12:54 PM CEST, Gary Guo wrote:
> IMO we can just support zero-sized allocation by always succeeding, simil=
ar to
> how ZST allocation is handled in memory allocation.

Probably, but in contrast to ZST allocations it wouldn't be very useful, so=
 we'd
silently succeed on something that never was a reasonable argument in the f=
irst
palce.