mem: do not check for invalid socket ID

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 <anatoly.burakov@intel.com>

diff --git a/doc/guides/rel_notes/release_18_11.rst b/doc/guides/rel_notes/release_18_11.rst
index 3e533c4..59c7d8c 100644 (file)
--- a/doc/guides/rel_notes/release_18_11.rst
+++ b/doc/guides/rel_notes/release_18_11.rst
@@ -123,6 +123,13 @@ API Changes
   for any 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.
 
 * mbuf: The ``__rte_mbuf_raw_free()`` and ``__rte_pktmbuf_prefree_seg()``
   functions were deprecated since 17.05 and are replaced by

diff --git a/lib/librte_eal/common/eal_common_memzone.c b/lib/librte_eal/common/eal_common_memzone.c
index 7300fe0..b7081af 100644 (file)
--- 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 a9cfa42..09b0606 100644 (file)
--- a/lib/librte_eal/common/malloc_heap.c
+++ b/lib/librte_eal/common/malloc_heap.c
@@ -651,7 +651,7 @@ 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 73d6df3..9ba1472 100644 (file)
--- 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;
-
        return malloc_heap_alloc(type, size, socket_arg, 0,
                        align == 0 ? 1 : align, 0, false);
 }