[dpdk-dev] [PATCH v2] doc: update flow non-cached mode notes

[Bing Zhao <bingz@mellanox.com>]

This patch updates the MLX5 PMD and release notes documentations.
Adding the notes of the behavior change that rte flows organization
is switched into non-cached mode for applications.

Signed-off-by: Bing Zhao <bingz@mellanox.com>
---
v2: update the description in release notes.
---
 doc/guides/nics/mlx5.rst               | 10 ++++++++++
 doc/guides/rel_notes/release_20_05.rst |  1 +
 2 files changed, 11 insertions(+)

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index e13c07d..63138c4 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -1287,6 +1287,16 @@ set, and we should allow to specify zero values as rte_flow parameters for the
 META and MARK items and actions. In the same time zero mask has no meaning and
 should be rejected on validation stage.
 
+Notes for rte_flow
+------------------
+Implementation of flows organization is in non-cached mode. When stopping a
+device, all the flows inserted from application will be considered invalid and
+flushed automatically in the background. After restarting of the device, no
+application's flow exists in the system.
+
+The application should re-insert the flows as required after device restarting,
+and must not try to destroy or flush the invalid flows before stopping.
+
 Notes for testpmd
 -----------------
 
diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst
index 4b81893..b951745 100644
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -62,6 +62,7 @@ New Features
 
   * Added support for matching on IPv4 Time To Live and IPv6 Hop Limit.
   * Added support for creating Relaxed Ordering Memory Regions.
+  * Flow rules caching removed from the driver for memory saving.
 
 * **Updated the Intel ice driver.**
 
-- 
1.8.3.1