path: root/doc/guides/nics/mlx5.rst
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Diffstat (limited to 'doc/guides/nics/mlx5.rst')
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index f4db921..fa9bf73 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -86,6 +86,11 @@ Limitations
- Forked secondary process not supported.
- All mempools must be initialized before rte_eth_dev_start().
+ - External memory unregistered in EAL memseg list cannot be used for DMA
+ unless such memory has been registered by ``mlx5_mr_update_ext_mp()`` in
+ primary process and remapped to the same virtual address in secondary
+ process. If the external memory is registered by primary process but has
+ different virtual address in secondary process, unexpected error may happen.
- Flow pattern without any specific vlan will match for vlan packets as well: