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From: Karthikraj palanichamy <karthikraj.palanichamy@veryxtech.com>
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Date: Thu, 9 Feb 2017 12:08:54 +0530
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Subject: [dpdk-dev] Problem in configuring buffer size of a memory pool
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Hi developers,

For /`rte_pktmbuf_pool_create()`, /I normally provide 
RTE_MBUF_DEFAULT_BUF_SIZE as the data room size.

I needed to change this dynamically based on the frame size to be 
transmitted.
To transmit 80 bytes frames, I configured (80 +/RTE_PKTMBUF_HEADROOM/). 
There was no problem and transmission was successful.

Then I will do `rte_mempool_free()` and create mem pool again whenever 
needed.

So, my code flow is /create mempool -> transmit pkts -> free mempool/

When I do this for 3 to 5 times, I get segmentation fault in the 
transmission API of the PMD. - 'eth_igb_xmit_pkts' for igb PMD and  
'ixgbe_xmit_pkts_vec()' for ixgbe PMD.

Thanks in advance for your help.

Regards
Karthik

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