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[87.16.204.231]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4549130549bsm41002672f8f.18.2026.05.13.03.54.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 May 2026 03:54:19 -0700 (PDT) From: Stefano Garzarella To: netdev@vger.kernel.org Cc: Xuan Zhuo , "Michael S. Tsirkin" , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , linux-kernel@vger.kernel.org, Simon Horman , Paolo Abeni , Jakub Kicinski , Stefano Garzarella , Jason Wang , kvm@vger.kernel.org, Stefan Hajnoczi , virtualization@lists.linux.dev, Eric Dumazet , "David S. Miller" Subject: [PATCH net v3 0/2] vsock/virtio: fix skb overhead accounting to preserve full buf_alloc Date: Wed, 13 May 2026 12:54:15 +0200 Message-ID: <20260513105417.56761-1-sgarzare@redhat.com> X-Mailer: git-send-email 2.54.0 Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The code is exactly the same as in v2, but split into two patches as Michael suggested in v2: - Patch 1 resets the connection when we can no longer queue packets, this prevents silent data loss, and both peers are notified. - Patch 2 increases the total budget to `buf_alloc * 2` for payload plus skb overhead similar to how SO_RCVBUF is doubled to reserve space for sk_buff metadata. This preserves the full buf_alloc for payload under normal operation, while still bounding the skb queue growth. v3: - Split in 2 patches [MST] v2: https://lore.kernel.org/netdev/20260512080737.36787-1-sgarzare@redhat.com/ - Close the connection when we can no longer queue new packets instead of losing data. - No longer announce the reduced buf_alloc to avoid violating the spec. [MST] v1: https://lore.kernel.org/netdev/20260508092330.69690-1-sgarzare@redhat.com/ Stefano Garzarella (2): vsock/virtio: reset connection on receiving queue overflow vsock/virtio: fix skb overhead accounting to preserve full buf_alloc net/vmw_vsock/virtio_transport_common.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) -- 2.54.0