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Date: Tue, 21 Nov 2023 15:48:41 -0800
From: Jakub Kicinski <>
To: Souradeep Chakrabarti <>
Subject: Re: [PATCH V2 net-next] net: mana: Assigning IRQ affinity on HT

On Tue, 21 Nov 2023 05:54:37 -0800 Souradeep Chakrabarti wrote:
> Existing MANA design assigns IRQ to every CPUs, including sibling hyper-threads
> in a core. This causes multiple IRQs to work on same CPU and may reduce the network
> performance with RSS.
> Improve the performance by adhering the configuration for RSS, which assigns IRQ
> on HT cores.

Drivers should not have to carry 120 LoC for something as basic as
spreading IRQs. Please take a look at include/linux/topology.h and
if there's nothing that fits your needs there - add it. That way
other drivers can reuse it.

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