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From: Stephen Hemminger <stephen@networkplumber.org>
To: dev@dpdk.org
Cc: Stephen Hemminger <stephen@networkplumber.org>,
	Bruce Richardson <bruce.richardson@intel.com>
Subject: [dpdk-dev] [PATCH v2] doc: add deprecation notice about changes to ethernet structures
Date: Fri, 19 Jul 2019 09:56:31 -0700
Message-ID: <20190719165631.9235-1-stephen@networkplumber.org> (raw)
In-Reply-To: <20190709150257.GB497@bricha3-MOBL.ger.corp.intel.com>

Tell users about upcoming changes to rte_ether_addr and

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
v2 - reword and fix spelling

 doc/guides/rel_notes/deprecation.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index a7796f49b9fe..307f831cee60 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -82,3 +82,13 @@ Deprecation Notices
   to set new power environment if power environment was already initialized.
   In this case the function will return -1 unless the environment is unset first
   (using ``rte_power_unset_env``). Other function usage scenarios will not change.
+* net: the Ethernet address and header definitions will change
+  attributes. The Ethernet address struct will no longer be marked as
+  packed since the packed attribute is meaningless on a byte
+  array. The Ethernet header will be marked as aligned on a 2-byte
+  boundary and will no longer have the packed attribute. This allows
+  for efficient access on CPU architectures where unaligned access is
+  expensive. These changes should not impact normal usage because drivers
+  naturally align the Ethernet header on receive and all known
+  encapsulations preserve the alignment of the header.

  parent reply	other threads:[~2019-07-19 16:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-09 14:58 [dpdk-dev] [PATCH] doc: deprecation notice for change of ether struct alignment Bruce Richardson
2019-07-09 14:59 ` Stephen Hemminger
2019-07-09 15:02   ` Bruce Richardson
2019-07-18 22:09     ` [dpdk-dev] [PATCH] doc: add deprecation notice about changes to ethernet structures Stephen Hemminger
2019-07-19 10:57       ` Bruce Richardson
2019-07-19 16:56     ` Stephen Hemminger [this message]
2019-07-23 11:28       ` [dpdk-dev] [PATCH v2] " Andrew Rybchenko
2019-07-31 10:46         ` Ferruh Yigit
2019-08-06 11:26           ` Thomas Monjalon
2019-08-10 20:22             ` Thomas Monjalon

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