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doc: updating to 1.8 release note

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Added instructions for updating from DPDK 1.7.0 to 1.8.0

Signed-off-by: Siobhan Butler <siobhan.a.butler@intel.com>
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
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Siobhan Butler 2014-12-18 15:48:47 +00:00 committed by Thomas Monjalon
parent 7547be1efc
commit 5ef25d82fd
1 changed files with 13 additions and 0 deletions
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doc/guides/rel_notes/updating_apps.rst
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@ -7,6 +7,19 @@ may require some code updates to benefit from performance and user experience en
DPDK 1.7 to DPDK 1.8
--------------------
Note that in DPDK 1.8, the structure of the rte_mbuf has changed considerably from all previous versions.
It is recommended that users familiarize themselves with the new structure defined in the file rte_mbuf.h in the release package.
The follow are some common changes that need to be made to code using mbufs, following an update to DPDK 1.8:
* Any references to fields in the pkt or ctrl sub-structures of the mbuf, need to be replaced with references to the field
directly from the rte_mbuf, i.e. buf->pkt.data_len should be replace by buf->data_len.
* Any direct references to the data field of the mbuf (original buf->pkt.data) should now be replace by the macro rte_pktmbuf_mtod
to get a computed data address inside the mbuf buffer area.
* Any references to the in_port mbuf field should be replace by references to the port field.
NOTE: The above list is not exhaustive, but only includes the most commonly required changes to code using mbufs.
Intel® DPDK 1.6 to DPDK 1.7
---------------------------