rte_iova_t iova;
unsigned mz_id, n;
int ret;
- bool no_contig, try_contig, no_pageshift;
+ bool no_contig, try_contig, no_pageshift, external;
ret = mempool_ops_alloc_once(mp);
if (ret != 0)
return ret;
+ /* check if we can retrieve a valid socket ID */
+ ret = rte_malloc_heap_socket_is_external(mp->socket_id);
+ if (ret < 0)
+ return -EINVAL;
+ external = ret;
+
/* mempool must not be populated */
if (mp->nb_mem_chunks != 0)
return -EEXIST;
* in one contiguous chunk as well (otherwise we might end up wasting a
* 1G page on a 10MB memzone). If we fail to get enough contiguous
* memory, then we'll go and reserve space page-by-page.
+ *
+ * We also have to take into account the fact that memory that we're
+ * going to allocate from can belong to an externally allocated memory
+ * area, in which case the assumption of IOVA as VA mode being
+ * synonymous with IOVA contiguousness will not hold. We should also try
+ * to go for contiguous memory even if we're in no-huge mode, because
+ * external memory may in fact be IOVA-contiguous.
*/
- no_pageshift = no_contig || rte_eal_iova_mode() == RTE_IOVA_VA;
- try_contig = !no_contig && !no_pageshift && rte_eal_has_hugepages();
+ external = rte_malloc_heap_socket_is_external(mp->socket_id) == 1;
+ no_pageshift = no_contig ||
+ (!external && rte_eal_iova_mode() == RTE_IOVA_VA);
+ try_contig = !no_contig && !no_pageshift &&
+ (rte_eal_has_hugepages() || external);
if (no_pageshift) {
pg_sz = 0;