From: Dexuan Cui <decui@xxxxxxxxxxxxx>
Date: Wed, 4 May 2016 09:56:57 -0700
> +#define VMBUS_RINGBUFFER_SIZE_HVSOCK_RECV (5 * PAGE_SIZE)
> +#define VMBUS_RINGBUFFER_SIZE_HVSOCK_SEND (5 * PAGE_SIZE)
> +
> +#define HVSOCK_RCV_BUF_SZ VMBUS_RINGBUFFER_SIZE_HVSOCK_RECV
...
> +struct hvsock_sock {
...
> + /* The 'hdr' and 'buf' in the below 'send' and 'recv' definitions must
> + * be consecutive: see hvsock_send_data() and hvsock_recv_data().
> + */
> + struct {
> + struct vmpipe_proto_header hdr;
> + u8 buf[HVSOCK_SND_BUF_SZ];
> + } send;
> +
> + struct {
> + struct vmpipe_proto_header hdr;
> + u8 buf[HVSOCK_RCV_BUF_SZ];
> +
> + unsigned int data_len;
> + unsigned int data_offset;
> + } recv;
I don't think allocating 5 pages of unswappable memory for every Hyper-V socket
created is reasonable.
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