Errors using span interface on if_bridge(4)

[hiren panchasara]

On Sat, Feb 1, 2014 at 6:29 PM, hiren panchasara
<hiren.panchasara at gmail.com> wrote:
> On Sat, Feb 1, 2014 at 5:16 PM, hiren panchasara
> <hiren.panchasara at gmail.com> wrote:
<skip>

> Trying to find how to narrow down what is causing this checksum errors.

>From ixgbe.c: ixgbe_rx_checksum()

4643         if (status & IXGBE_RXD_STAT_IPCS) {
4644                 if (!(errors & IXGBE_RXD_ERR_IPE)) {
                                 xxx
4645                         /* IP Checksum Good */
4646                         mp->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
4647                         mp->m_pkthdr.csum_flags |= CSUM_IP_VALID;
4648
4649                 } else {
                                 yyy
4650                         mp->m_pkthdr.csum_flags = 0;
4651                 }
4652
4653         }


If I put a device_printf() at xxx, everything slows down and I see
very less packets making through with near-zero checksum errors.
A device_printf() at yyy (and nothing at xxx) never gets called. I was
expecting it to be called as I thought checksum errors would cause
that code-path to be traversed.

cheers,
Hiren