diff options
Diffstat (limited to 'include/linux/virtio_vsock.h')
| -rw-r--r-- | include/linux/virtio_vsock.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h index 0387d64e2c66..6c00687539cf 100644 --- a/include/linux/virtio_vsock.h +++ b/include/linux/virtio_vsock.h @@ -111,7 +111,12 @@ static inline size_t virtio_vsock_skb_len(struct sk_buff *skb) return (size_t)(skb_end_pointer(skb) - skb->head); } -#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4) +/* Dimension the RX SKB so that the entire thing fits exactly into + * a single 4KiB page. This avoids wasting memory due to alloc_skb() + * rounding up to the next page order and also means that we + * don't leave higher-order pages sitting around in the RX queue. + */ +#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE SKB_WITH_OVERHEAD(1024 * 4) #define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64) @@ -140,6 +145,7 @@ struct virtio_vsock_sock { u32 last_fwd_cnt; u32 rx_bytes; u32 buf_alloc; + u32 buf_used; struct sk_buff_head rx_queue; u32 msg_count; }; |