[dpdk-users] rte_pktmbuf_free does not reset headroom

[Stephen Hemminger]

On Wed, 15 Jan 2020 16:40:47 +0000
"Girard, Guillaume" <guillaume.girard at intel.com> wrote:

> Hi,
> 
> From my experiments prepending data to an mbuf, rte_pktmbuf_free() does not reset the headroom. Is that intended?
> 
> Thanks,
> Guillaume
> 
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Free doesn't need to do anything to the mbuf. After free the state of
the mbuf is indeterminate (ie. it can be what ever rte_mbuf code wants).

The headroom is reset in rte_pktmbuf_reset() which is called by
rte_pktmbuf_alloc().