[dpdk-dev] [PATCH] doc: announce ABI change for ring structure
Olivier Matz
olivier.matz at 6wind.com
Mon Sep 11 15:39:13 CEST 2017
As discussed on the mailing list, the alignment constraint of
the ring structure can be relaxed.
Link: http://dpdk.org/dev/patchwork/patch/25039
Link: http://dpdk.org/dev/patchwork/patch/26103
Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
doc/guides/rel_notes/deprecation.rst | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 3362f3350..5a63c0277 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -120,3 +120,9 @@ Deprecation Notices
The non-"do-sig" versions of the hash tables will be removed
(including the ``signature_offset`` parameter)
and the "do-sig" versions renamed accordingly.
+
+* ring: The alignment constraints on the ring structure will be relaxed
+ to one cache line instead of two, and an empty cache line padding will
+ be added between the producer and consumer structures. The size of the
+ structure and the offset of the fields will remain the same on
+ platforms with 64B cache line, but will change on other platforms.
--
2.11.0
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