[dpdk-dev] [PATCH] memalloc: check for contiguousness in external segments

[Anatoly Burakov]

For IOVA as VA mode, we assume that memory is contiguous. However,
for external segments that assumption may not necessarily hold.
Fix the code to not assume that external memory segments are
contiguous even in IOVA as VA mode.

Fixes: 5282bb1c3695 ("mem: allow memseg lists to be marked as external")

Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
---
 lib/librte_eal/common/eal_common_memalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/eal_common_memalloc.c b/lib/librte_eal/common/eal_common_memalloc.c
index 1d41ea112..371271979 100644
--- a/lib/librte_eal/common/eal_common_memalloc.c
+++ b/lib/librte_eal/common/eal_common_memalloc.c
@@ -77,7 +77,7 @@ eal_memalloc_is_contig(const struct rte_memseg_list *msl, void *start,
 	const struct rte_memseg *ms;
 
 	/* for IOVA_VA, it's always contiguous */
-	if (rte_eal_iova_mode() == RTE_IOVA_VA)
+	if (rte_eal_iova_mode() == RTE_IOVA_VA && !msl->external)
 		return true;
 
 	/* for legacy memory, it's always contiguous */
-- 
2.17.1