linux-kernel - Re: [net-next v3 1/2] igc: Link IRQs to NAPI instances

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Message-ID: <878quhgxel.fsf@intel.com>
Date: Mon, 21 Oct 2024 10:48:18 -0700
From: Vinicius Costa Gomes <vinicius.gomes@...el.com>
To: Joe Damato <jdamato@...tly.com>, netdev@...r.kernel.org
Cc: kurt@...utronix.de, Joe Damato <jdamato@...tly.com>, Tony Nguyen
 <anthony.l.nguyen@...el.com>, Przemek Kitszel
 <przemyslaw.kitszel@...el.com>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, "moderated list:INTEL ETHERNET DRIVERS"
 <intel-wired-lan@...ts.osuosl.org>, open list
 <linux-kernel@...r.kernel.org>
Subject: Re: [net-next v3 1/2] igc: Link IRQs to NAPI instances

Joe Damato <jdamato@...tly.com> writes:

> Link IRQs to NAPI instances via netdev-genl API so that users can query
> this information with netlink.
>
> Compare the output of /proc/interrupts (noting that IRQ 144 is the
> "other" IRQ which does not appear to have a NAPI instance):
>
> $ cat /proc/interrupts | grep enp86s0 | cut --delimiter=":" -f1
>  128
>  129
>  130
>  131
>  132
>
> The output from netlink shows the mapping of NAPI IDs to IRQs (again
> noting that 144 is absent as it is the "other" IRQ):
>
> $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
>                          --dump napi-get --json='{"ifindex": 2}'
>
> [{'defer-hard-irqs': 0,
>   'gro-flush-timeout': 0,
>   'id': 8196,
>   'ifindex': 2,
>   'irq': 132},
>  {'defer-hard-irqs': 0,
>   'gro-flush-timeout': 0,
>   'id': 8195,
>   'ifindex': 2,
>   'irq': 131},
>  {'defer-hard-irqs': 0,
>   'gro-flush-timeout': 0,
>   'id': 8194,
>   'ifindex': 2,
>   'irq': 130},
>  {'defer-hard-irqs': 0,
>   'gro-flush-timeout': 0,
>   'id': 8193,
>   'ifindex': 2,
>   'irq': 129}]
>
> Signed-off-by: Joe Damato <jdamato@...tly.com>
> ---

Acked-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>

Cheers,
-- 
Vinicius