From: Stefano Garzarella <sgarzare@xxxxxxxxxx> Date: Fri, 31 May 2019 15:39:51 +0200 > @@ -434,7 +434,9 @@ void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val) > if (val > vvs->buf_size_max) > vvs->buf_size_max = val; > vvs->buf_size = val; > + spin_lock_bh(&vvs->rx_lock); > vvs->buf_alloc = val; > + spin_unlock_bh(&vvs->rx_lock); This locking doesn't do anything other than to strongly order the buf_size store to occur before the buf_alloc one. If you need a memory barrier, use one.
