netdev - [PATCH net-next 0/4] ibmvnic: Improve queue stats and subcrq indirect handling

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Message-Id: <20250630234806.10885-1-mmc@linux.ibm.com>
Date: Mon, 30 Jun 2025 16:48:02 -0700
From: Mingming Cao <mmc@...ux.ibm.com>
To: netdev@...r.kernel.org
Cc: bjking1@...ux.ibm.com, haren@...ux.ibm.com, ricklind@...ux.ibm.com,
        mmc@...ux.ibm.com
Subject: [PATCH net-next 0/4] ibmvnic: Improve queue stats and subcrq indirect handling

This patch series introduces improvements and fixes for
the ibmvnic driver, focusing on statistics handling and CRQ scalability:

1. Dynamically derive NUM_R instead of relying on a static macro.
This allows more flexible configuration of receive queues at runtime.

2. Convert queue-level statistics to use atomic64_t to ensure correctness
under concurrent updates and avoid race conditions.

3. Fix inaccurate System Attention Resource (SAR) statistics reporting
by switching to ndo_get_stats64. This aligns the SAR path with the standard
kernel interface for retrieving network statistics, ensuring accuracy and consistency.

4. Increase the maximum number of indirect entries per sub-CRQ to
 better support high-throughput configurations and future scaling needs.

Mingming Cao (4):
  ibmvnic: Derive NUM_RX_STATS/NUM_TX_STATS dynamically
  ibmvnic: Use atomic64_t for queue stats
  ibmvnic: Use ndo_get_stats64 to fix inaccurate SAR reporting
  ibmvnic: Make max subcrq indirect entries tunable via module param

 drivers/net/ethernet/ibm/ibmvnic.c | 92 ++++++++++++++++++++----------
 drivers/net/ethernet/ibm/ibmvnic.h | 29 ++++++----
 2 files changed, 80 insertions(+), 41 deletions(-)

-- 
2.39.3 (Apple Git-146)