netdev - Re: [PATCH net-next] igc: Avoid transmit queue timeout for XDP

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Date:   Thu, 13 Apr 2023 09:39:41 -0700
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     Kurt Kanzenbach <kurt@...utronix.de>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Vinicius Costa Gomes <vinicius.gomes@...el.com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] igc: Avoid transmit queue timeout for XDP



On 4/13/2023 9:03 AM, Jakub Kicinski wrote:
> On Wed, 12 Apr 2023 15:30:38 -0700 Jacob Keller wrote:
>> Is most driver's XDP implementation broken? There's also
>> netif_trans_update but this is called out as a legacy only function. Far
>> more drivers call this but I don't see either call or a direct update to
>> trans_start in many XDP implementations...
>>
>> Am I missing something or are a bunch of other XDP implementations also
>> wrong?
> 
> Only drivers which use the same Tx queues for the stack and XDP need
> this.

Ok that explains it. igc has few enough queues they need to be shared,
but other devices have more queues and can use dedicated queues.

Then this looks good to me!

Thanks,
Jake