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Date: Wed, 1 Jul 2015 12:11:49 +0100
From: Bruce Richardson <bruce.richardson@intel.com>
To: Gopakumar Choorakkot Edakkunni <gopakumar.c.e@gmail.com>
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Subject: Re: [dpdk-dev] dpdk-2.0.0: crash in
 ixgbe_recv_scattered_pkts_vec->_recv_raw_pkts_vec->desc_to_olflags_v
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On Tue, Jun 30, 2015 at 05:50:14PM -0700, Gopakumar Choorakkot Edakkunni wrote:
> So update on this. Summary is that its purely my fault, apologies for
> prematurely suspecting the wrong areas. Details below
> 
> 1. So my AWS box had an eth0 interface without DPDK, I enabled dpdk
> AND created a KNI interface also AND named the KNI interface to be
> eth0
> 
> 2. So Ubuntu started its dhcpclient on that interface, but my app
> doesnt really do anything do read the dhcp (renews) from the KNI and
> send it out the physical port and vice versa .. The kni was just
> sitting there not doing much of Rx/Tx
> 
> 3. Now my l2fwd-equivalent code started working fine, after a few
> minutes, the dhcp client on ubuntu gave up attempting dhcp renew (eth0
> already had an IP) and attempted to take off the IP from eth0
> 
> 4. At this point the standard KNI examples in dpdk which has callbacks
> registered, ended up being invoked - and the examples have a
> port_stop() and a port_start() in them - and exactly at this point my
> app crashed
> 
> So my bad! I just no-oped the callbacks for now and changed AWS eht0
> from dhcp to static IP and this are fine now ! My system has been up
> for long with no issues.
> 
> Thanks again Thomas and Bruce for the quick response and suggestions
>
No problem. Thanks for letting us know that this was resolved.

Regards,
/Bruce