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[87.12.139.105]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43cf21e9e24sm18330997f8f.10.2026.03.30.07.46.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Mar 2026 07:46:40 -0700 (PDT) Date: Mon, 30 Mar 2026 16:46:24 +0200 From: Stefano Garzarella To: Petr Vorel Cc: virtualization@lists.linux.dev, netdev@vger.kernel.org, Valentin Lefebvre , Yu Watanabe , Andrei Borzenkov , Luca Boccassi , Luca Boccassi Subject: Re: [RFC] loading vmw_vsock_virtio_transport by systemd breaks vsock_loopback autoloading Message-ID: References: <20260320110224.GA140154@pevik> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20260320110224.GA140154@pevik> On Fri, Mar 20, 2026 at 12:02:24PM +0100, Petr Vorel wrote: >Hi all, > >there is a systemd bug [1] which causes vsock_loopback not to be autoloaded due >previous loading vmw_vsock_virtio_transport in an early phase of boot. >vmw_vsock_virtio_transport requires vmw_vsock_virtio_transport_common and vsock, >vsock_loopback requires vsock. > >Reproducer: [2]. >Proposed fix in systemd: [3] > >While I think the bug should be fixed in systemd with proposed fix [3] we'd like >to know opinion of the kernel vsock developers in case there is a way to improve >vsock modules autoloading. The original idea of vsock_loopback was to be used just for testing/debugging, so maybe even the autoloading when no other transport was loaded wasn't a great idea, but at the time we thought it might be useful for testing. In general, therefore, if you want to use the loopback, it's always best to load vsock_loopback. What use case is being affected by the fact that vsock_loopback isn't loaded automatically? Thanks, Stefano