We will be assigning "invalid" socket ID's to external heap, and
malloc will now be able to verify if a supplied socket ID is in
fact a valid one, rendering parameter checks for sockets
obsolete.

This changes the semantics of what we understand by "socket ID",
so document the change in the release notes.

Signed-off-by: Anatoly Burakov <redacted>
---
 doc/guides/rel_notes/release_18_11.rst     | 7 +++++++
 lib/librte_eal/common/eal_common_memzone.c | 8 +++++---
 lib/librte_eal/common/malloc_heap.c        | 2 +-
 lib/librte_eal/common/rte_malloc.c         | 4 ----
 4 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/doc/guides/rel_notes/release_18_11.rst

b/doc/guides/rel_notes/release_18_11.rst
index 5fc71e208..6ee236302 100644

--- a/doc/guides/rel_notes/release_18_11.rst
+++ b/doc/guides/rel_notes/release_18_11.rst

@@ -98,6 +98,13 @@ API Changes
     users of memseg-walk-related functions, as they will now have to skip
     externally allocated segments in most cases if the intent is to only

iterate
     over internal DPDK memory.
+  - ``socket_id`` parameter across the entire DPDK has gained additional
+    meaning, as some socket ID's will now be representing externally
allocated
+    memory. No changes will be required for existing code as backwards
+    compatibility will be kept, and those who do not use this feature
will not
+    see these extra socket ID's. Any new API's must not check socket ID
+    parameters themselves, and must instead leave it to the memory
subsystem to
+    decide whether socket ID is a valid one.

 ABI Changes
 -----------

diff --git a/lib/librte_eal/common/eal_common_memzone.c

b/lib/librte_eal/common/eal_common_memzone.c
index 7300fe05d..b7081afbf 100644

--- a/lib/librte_eal/common/eal_common_memzone.c
+++ b/lib/librte_eal/common/eal_common_memzone.c

@@ -120,13 +120,15 @@ memzone_reserve_aligned_thread_unsafe(const char

*name, size_t len,
                return NULL;
        }

-       if ((socket_id != SOCKET_ID_ANY) &&
-           (socket_id >= RTE_MAX_NUMA_NODES || socket_id < 0)) {
+       if ((socket_id != SOCKET_ID_ANY) && socket_id < 0) {

                rte_errno = EINVAL;
                return NULL;
        }

-       if (!rte_eal_has_hugepages())
+       /* only set socket to SOCKET_ID_ANY if we aren't allocating for an
+        * external heap.
+        */
+       if (!rte_eal_has_hugepages() && socket_id < RTE_MAX_NUMA_NODES)
                socket_id = SOCKET_ID_ANY;

        contig = (flags & RTE_MEMZONE_IOVA_CONTIG) != 0;

diff --git a/lib/librte_eal/common/malloc_heap.c

b/lib/librte_eal/common/malloc_heap.c
index 1d1e35708..73e478076 100644

--- a/lib/librte_eal/common/malloc_heap.c
+++ b/lib/librte_eal/common/malloc_heap.c

@@ -647,7 +647,7 @@ malloc_heap_alloc(const char *type, size_t size, int

socket_arg,
        if (size == 0 || (align && !rte_is_power_of_2(align)))
                return NULL;

-       if (!rte_eal_has_hugepages())
+       if (!rte_eal_has_hugepages() && socket_arg < RTE_MAX_NUMA_NODES)
                socket_arg = SOCKET_ID_ANY;

        if (socket_arg == SOCKET_ID_ANY)

diff --git a/lib/librte_eal/common/rte_malloc.c

b/lib/librte_eal/common/rte_malloc.c
index 73d6df31d..9ba1472c3 100644

--- a/lib/librte_eal/common/rte_malloc.c
+++ b/lib/librte_eal/common/rte_malloc.c

@@ -47,10 +47,6 @@ rte_malloc_socket(const char *type, size_t size,

unsigned int align,
        if (!rte_eal_has_hugepages())
                socket_arg = SOCKET_ID_ANY;

-       /* Check socket parameter */
-       if (socket_arg >= RTE_MAX_NUMA_NODES)
-               return NULL;
-