[PATCH 0/1] [n:linux-aws] aws: Backport CMA pool per numa functionality for 22.04 and 20.04

[Philip Cox]

BugLink: https://bugs.launchpad.net/bugs/2069352


SRU Justification:

[Impact]

We discovered a network packets per second (PPS) performance issue in one of our upcoming EC2 instance platform on Graviton.The issue is addressed by setting a value for the numa_cma parameter. While this parameter is supported in 24.04, the parameter is not available in 22.04 or 20.04 today, which could impact customers running 22.04 or 20.04 on the new EC2 platform.

[Fix]

We are requesting that the following changes be backported to 24.04 to fix a performance issue with NUMA node overrides for AWS EC2 ENA adapaters: https://github.com/torvalds/linux/commit/2dc8b1e7177d4f49f492ce648440caf2de0c366



[Test Plan]
aws tested

[Where problems could occur]
The patch changes how the driver uses shared memory NUMA node id advertised by the underlying device.

If any newly written code assumes the old behaviour, errors could arise.

[Other info]
sf# 00385923


--

Shay Agroskin (1):
  net: ena: Fix redundant device NUMA node override

 drivers/net/ethernet/amazon/ena/ena_com.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

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2.34.1