netdev - Re: [PATCH net 3/3] bnxt_en: Update MRU and RSS table of RSS contexts on queue reset

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Message-ID: <CACKFLikOwZmaucM4y2jMgKZ-s0vRyHBde+wuQRt33ScvfohyDA@mail.gmail.com>
Date: Tue, 20 May 2025 18:38:45 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com, 
	pabeni@...hat.com, andrew+netdev@...n.ch, pavan.chebbi@...adcom.com, 
	andrew.gospodarek@...adcom.com, David Wei <dw@...idwei.uk>
Subject: Re: [PATCH net 3/3] bnxt_en: Update MRU and RSS table of RSS contexts
 on queue reset

On Tue, May 20, 2025 at 6:28 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Mon, 19 May 2025 13:41:30 -0700 Michael Chan wrote:
> > @@ -15987,6 +16005,7 @@ static int bnxt_queue_stop(struct net_device *dev, void *qmem, int idx)
> >
> >               bnxt_set_vnic_mru_p5(bp, vnic, 0);
> >       }
> > +     bnxt_set_rss_ctx_vnic_mru(bp, 0);
> >       /* Make sure NAPI sees that the VNIC is disabled */
> >       synchronize_net();
> >       rxr = &bp->rx_ring[idx];
>
> What does setting MRU to zero do? All traffic will be dropped?
> Traffic will no longer be filtered based on MRU?  Or.. ?

That VNIC with MRU set to zero will not receive any more traffic.
This step was recommended by the FW team when we first started working
with David to implement the queue_mgmt_ops.

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