[dpdk-dev] [RFC v3 3/6] lib/mempool: allow page size aligned mempool

[Qi Zhang <qi.z.zhang@intel.com>]

Allow create a mempool with page size aligned base address.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 lib/librte_mempool/rte_mempool.c | 3 +++
 lib/librte_mempool/rte_mempool.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 03e6b5f73..61f7764c5 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -508,6 +508,9 @@ rte_mempool_populate_default(struct rte_mempool *mp)
 		if (try_contig)
 			flags |= RTE_MEMZONE_IOVA_CONTIG;
 
+		if (mp->flags & MEMPOOL_F_PAGE_ALIGN)
+			align = getpagesize();
+
 		mz = rte_memzone_reserve_aligned(mz_name, mem_size,
 				mp->socket_id, flags, align);
 
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 7c9cd9a2f..75553b36f 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -264,6 +264,7 @@ struct rte_mempool {
 #define MEMPOOL_F_POOL_CREATED   0x0010 /**< Internal: pool is created. */
 #define MEMPOOL_F_NO_IOVA_CONTIG 0x0020 /**< Don't need IOVA contiguous objs. */
 #define MEMPOOL_F_NO_PHYS_CONTIG MEMPOOL_F_NO_IOVA_CONTIG /* deprecated */
+#define MEMPOOL_F_PAGE_ALIGN     0x0040 /**< Chunk's base address is page aligned */
 
 /**
  * @internal When debug is enabled, store some statistics.
-- 
2.13.6