On 2020/5/6 下午3:37, Michael S. Tsirkin wrote:
On Wed, May 06, 2020 at 02:16:33PM +0800, Jason Wang wrote:
We should not exclude headroom and tailroom when XDP is set. So this
patch fixes this by initializing the truesize from PAGE_SIZE when XDP
is set.
Cc: Jesper Dangaard Brouer<brouer@xxxxxxxxxx>
Signed-off-by: Jason Wang<jasowang@xxxxxxxxxx>
Seems too aggressive, we do not use up the whole page for the size.
For XDP yes, we do:
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
struct ewma_pkt_len *avg_pkt_len,
unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
if (room)
return PAGE_SIZE - room;
...
Thanks
