mem: check for memfd support in segment fd API

[dpdk.git] / doc / guides / rel_notes / release_19_02.rst

diff --git a/doc/guides/rel_notes/release_19_02.rst b/doc/guides/rel_notes/release_19_02.rst
index a94fa86..010cac1 100644 (file)
--- a/doc/guides/rel_notes/release_19_02.rst
+++ b/doc/guides/rel_notes/release_19_02.rst
@@ -54,6 +54,32 @@ New Features
      Also, make sure to start the actual text at the margin.
      =========================================================
 
+* **Added support to free hugepages exactly as originally allocated.**
+
+  Some applications using memory event callbacks (especially for managing
+  RDMA memory regions) require that memory be freed back to the system
+  exactly as it was originally allocated. These applications typically
+  also require that a malloc allocation not span across two separate
+  hugepage allocations.  A new ``--match-allocations`` EAL init flag has
+  been added to fulfill both of these requirements.
+
+* **Added API to register external memory in DPDK.**
+
+  A new ``rte_extmem_register``/``rte_extmem_unregister`` API was added to allow
+  chunks of external memory to be registered with DPDK without adding them to
+  the malloc heap.
+
+* **Updated the enic driver.**
+
+  * Added support for ``RTE_ETH_DEV_CLOSE_REMOVE`` flag.
+  * Added the handler to get firmware version string.
+  * Added support for multicast filtering.
+
+* **Added a compression performance test tool.**
+
+  Added a new performance test tool to test the compressdev PMD. The tool tests
+  compression ratio and compression throughput.
+
 
 Removed Items
 -------------
@@ -83,6 +109,17 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =========================================================
 
+* eal: Segment fd API on Linux now sets error code to ``ENOTSUP`` in more cases
+  where segment fd API is not expected to be supported:
+
+  - On attempt to get segment fd for an externally allocated memory segment
+  - In cases where memfd support would have been required to provide segment
+    fd's (such as in-memory or no-huge mode)
+
+* pdump: The ``rte_pdump_set_socket_dir()``, the parameter ``path`` of
+  ``rte_pdump_init()`` and enum ``rte_pdump_socktype`` were deprecated
+  since 18.05 and are removed in this release.
+
 
 ABI Changes
 -----------
@@ -153,7 +190,7 @@ The libraries prepended with a plus sign were incremented in this version.
      librte_metrics.so.1
      librte_net.so.1
      librte_pci.so.1
-     librte_pdump.so.2
+   + librte_pdump.so.3
      librte_pipeline.so.3
      librte_pmd_bnxt.so.2
      librte_pmd_bond.so.2