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virtio-net: remove the warning before XDP linearizing

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Since we use EWMA to estimate the size of rx buffer. When rx buffer
size is underestimated, it's usual to have a packet with more than one
buffers. Consider this is not a bug, remove the warning and correct
the comment before XDP linearizing.

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2016-12-23 22:37:24 +08:00 • committed by David S. Miller
parent d3a51d6cbc
commit 73b62bd085
1 changed files with 1 additions and 7 deletions
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8
drivers/net/virtio_net.c
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@ -552,14 +552,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
struct page *xdp_page; struct page *xdp_page;
u32 act; u32 act;
/* No known backend devices should send packets with /* This happens when rx buffer size is underestimated */
* more than a single buffer when XDP conditions are
* met. However it is not strictly illegal so the case
* is handled as an exception and a warning is thrown.
*/
if (unlikely(num_buf > 1)) { if (unlikely(num_buf > 1)) {
bpf_warn_invalid_xdp_buffer();
/* linearize data for XDP */ /* linearize data for XDP */
xdp_page = xdp_linearize_page(rq, num_buf, xdp_page = xdp_linearize_page(rq, num_buf,
page, offset, &len); page, offset, &len);