[dpdk-dev] [RFC v2 3/7] 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 | 2 ++
 lib/librte_mempool/rte_mempool.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 54f7f4ba4..f8d4814ad 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -567,6 +567,8 @@ rte_mempool_populate_default(struct rte_mempool *mp)
 		pg_shift = 0; /* not needed, zone is physically contiguous */
 		pg_sz = 0;
 		align = RTE_CACHE_LINE_SIZE;
+		if (mp->flags & MEMPOOL_F_PAGE_ALIGN)
+			align = getpagesize();
 	} else {
 		pg_sz = getpagesize();
 		pg_shift = rte_bsf32(pg_sz);
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 8b1b7f7ed..774ab0f66 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -245,6 +245,7 @@ struct rte_mempool {
 #define MEMPOOL_F_SC_GET         0x0008 /**< Default get is "single-consumer".*/
 #define MEMPOOL_F_POOL_CREATED   0x0010 /**< Internal: pool is created. */
 #define MEMPOOL_F_NO_PHYS_CONTIG 0x0020 /**< Don't need physically contiguous objs. */
+#define MEMPOOL_F_PAGE_ALIGN     0x0040 /**< Base address is page aligned. */
 /**
  * This capability flag is advertised by a mempool handler, if the whole
  * memory area containing the objects must be physically contiguous.
-- 
2.13.6