netdev - Re: [PATCH net v4] dpaa_eth: fix XDP queue index

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Message-ID: <20240418075128.m4v4f3nlrzn3qlfl@skbuf>
Date: Thu, 18 Apr 2024 10:51:28 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Camelia Groza <camelia.groza@....com>,
	David Gouarin <dgouarin@...il.com>, david.gouarin@...lesgroup.com,
	Madalin Bucur <madalin.bucur@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org
Subject: Re: [PATCH net v4] dpaa_eth: fix XDP queue index

On Wed, Apr 17, 2024 at 06:17:34PM -0700, Jakub Kicinski wrote:
> On Thu, 11 Apr 2024 14:34:33 +0300 Vladimir Oltean wrote:
> > On Wed, Apr 10, 2024 at 07:40:55PM -0700, Jakub Kicinski wrote:
> > > On Tue,  9 Apr 2024 11:30:46 +0200 David Gouarin wrote:  
> > > > Make it possible to bind a XDP socket to a queue id.
> > > > The DPAA FQ Id was passed to the XDP program in the
> > > > xdp_rxq_info->queue_index instead of the Ethernet device queue number,
> > > > which made it unusable with bpf_map_redirect.
> > > > Instead of the DPAA FQ Id, initialise the XDP rx queue with the queue number.  
> > > 
> > > Camelia, looks good?  
> > 
> > Please allow me some time to prepare a response, even if this means the
> > patch misses this week's 'net' pull request.
> 
> We're getting close to the 'net' pull request of the following week :)
> The bug has been around for a while so no huge rush, but would be nice
> to get rid of this from patchwork. If you don't have time - would you
> be willing to repost it once you found the time to investigate?

I have been looking into this, but I do not have a definitive response yet.
The dpaa_fq->channel replacement is not the zero-based RX queue number
that David is looking for, either.

We will work this out. Please remove this patch from patchwork for now.