DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH] doc: add mlx5 limitation of RSS hash result
@ 2018-08-14 16:57 Yongseok Koh
  2018-08-16 20:46 ` Yongseok Koh
  0 siblings, 1 reply; 2+ messages in thread
From: Yongseok Koh @ 2018-08-14 16:57 UTC (permalink / raw)
  To: shahafs; +Cc: dev, Yongseok Koh

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
---
 doc/guides/nics/mlx5.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 52e1213cf5..cbcc233d03 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -136,6 +136,12 @@ Limitations
   enabled (``rxq_cqe_comp_en``) at the same time, RSS hash result is not fully
   supported. Some Rx packets may not have PKT_RX_RSS_HASH.
 
+- In general, PKT_RX_RSS_HASH shall be set in a received mbuf if RSS is enabled
+  and the packet is subject to hash cacalculation. However, in case of
+  vectorized Rx (``rx_vec_en``), PKT_RX_RSS_HASH will always be set as long as
+  RSS is enabled. Zero hash result (mbuf->hash.rss) means the packet isn't
+  subject to the configured RSS hash type and the flag should be disregarded.
+
 Statistics
 ----------
 
-- 
2.11.0

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2018-08-16 20:46 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-08-14 16:57 [dpdk-dev] [PATCH] doc: add mlx5 limitation of RSS hash result Yongseok Koh
2018-08-16 20:46 ` Yongseok Koh

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).