linux-kernel - [PATCH v4 0/9] vsock/virtio: SKB allocation improvements

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Message-Id: <20250717090116.11987-1-will@kernel.org>
Date: Thu, 17 Jul 2025 10:01:07 +0100
From: Will Deacon <will@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Will Deacon <will@...nel.org>,
	Keir Fraser <keirf@...gle.com>,
	Steven Moreland <smoreland@...gle.com>,
	Frederick Mayle <fmayle@...gle.com>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Stefano Garzarella <sgarzare@...hat.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	netdev@...r.kernel.org,
	virtualization@...ts.linux.dev
Subject: [PATCH v4 0/9] vsock/virtio: SKB allocation improvements

Hi all,

Here is version four of the patches I previously posted here:

  v1: https://lore.kernel.org/r/20250625131543.5155-1-will@kernel.org
  v2: https://lore.kernel.org/r/20250701164507.14883-1-will@kernel.org
  v3: https://lore.kernel.org/r/20250714152103.6949-1-will@kernel.org

There are only two minor changes since v3:

  * Use unlikely() in payload length check on the virtio rx path

  * Add R-b tags from Stefano

Cheers,

Will

Cc: Keir Fraser <keirf@...gle.com>
Cc: Steven Moreland <smoreland@...gle.com>
Cc: Frederick Mayle <fmayle@...gle.com>
Cc: Stefan Hajnoczi <stefanha@...hat.com>
Cc: Stefano Garzarella <sgarzare@...hat.com>
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: "Eugenio Pérez" <eperezma@...hat.com>
Cc: linux-kernel@...r.kernel.org 
Cc: netdev@...r.kernel.org 
Cc: virtualization@...ts.linux.dev

--->8

Will Deacon (9):
  vhost/vsock: Avoid allocating arbitrarily-sized SKBs
  vsock/virtio: Validate length in packet header before skb_put()
  vsock/virtio: Move length check to callers of
    virtio_vsock_skb_rx_put()
  vsock/virtio: Resize receive buffers so that each SKB fits in a 4K
    page
  vsock/virtio: Rename virtio_vsock_alloc_skb()
  vsock/virtio: Move SKB allocation lower-bound check to callers
  vhost/vsock: Allocate nonlinear SKBs for handling large receive
    buffers
  vsock/virtio: Rename virtio_vsock_skb_rx_put()
  vsock/virtio: Allocate nonlinear SKBs for handling large transmit
    buffers

 drivers/vhost/vsock.c                   | 15 ++++----
 include/linux/virtio_vsock.h            | 46 +++++++++++++++++++------
 net/vmw_vsock/virtio_transport.c        | 20 ++++++++---
 net/vmw_vsock/virtio_transport_common.c |  3 +-
 4 files changed, 60 insertions(+), 24 deletions(-)

-- 
2.50.0.727.gbf7dc18ff4-goog