From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next v2 6/8] ixgbe: fix RSS limit for X550 Date: Tue, 29 Dec 2015 19:23:27 -0800 Message-ID: <1451445809-70497-7-git-send-email-jeffrey.t.kirsher@intel.com> References: <1451445809-70497-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Emil Tantilov , netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com, jogreene@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga02.intel.com ([134.134.136.20]:59463 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754050AbbL3DXg (ORCPT ); Tue, 29 Dec 2015 22:23:36 -0500 In-Reply-To: <1451445809-70497-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Emil Tantilov X550 allows for up to 64 RSS queues, but the driver can have max of 63 (-1 MSIX vector for link). On systems with >= 64 CPUs the driver will set the redirection table for all 64 queues which will result in packets being dropped. Signed-off-by: Emil Tantilov Tested-by: Phil Schmitt Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index f4c9a42..4b9156c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -317,7 +317,7 @@ enum ixgbe_ring_f_enum { }; #define IXGBE_MAX_RSS_INDICES 16 -#define IXGBE_MAX_RSS_INDICES_X550 64 +#define IXGBE_MAX_RSS_INDICES_X550 63 #define IXGBE_MAX_VMDQ_INDICES 64 #define IXGBE_MAX_FDIR_INDICES 63 /* based on q_vector limit */ #define IXGBE_MAX_FCOE_INDICES 8 -- 2.5.0