netdev - Re: STMMAC driver CPU stall warning

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Date: Wed, 26 Jun 2024 12:37:59 +0100
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Jose Abreu <Jose.Abreu@...opsys.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>, netdev <netdev@...r.kernel.org>
Subject: Re: STMMAC driver CPU stall warning

Hi Jose,

On Wed, Jun 26, 2024 at 11:54 AM Jose Abreu <Jose.Abreu@...opsys.com> wrote:
>
> From: Lad, Prabhakar <prabhakar.csengg@...il.com>
> Date: Tue, Jun 25, 2024 at 16:15:15
>
> > Hi Jose,
> >
> > On Tue, Jun 25, 2024 at 1:11 PM Jose Abreu <Jose.Abreu@...opsys.com> wrote:
> > >
> > > From: Lad, Prabhakar <prabhakar.csengg@...il.com>
> > > Date: Tue, Jun 25, 2024 at 10:30:41
> > >
> > > >     mtl_tx_setup0: tx-queues-config {
> > > >         snps,tx-queues-to-use = <4>;
> > > >         snps,tx-sched-sp;
> > > >
> > > >         queue0 {
> > > >             snps,dcb-algorithm;
> > > >             snps,priority = <0x1>;
> > > >         };
> > > >
> > > >         queue1 {
> > > >             snps,dcb-algorithm;
> > > >             snps,priority = <0x2>;
> > > >         };
> > > >
> > > >         queue2 {
> > > >             snps,dcb-algorithm;
> > > >             snps,priority = <0x4>;
> > > >         };
> > > >
> > > >         queue3 {
> > > >             snps,dcb-algorithm;
> > > >             snps,priority = <0x1>;
> > > >         };
> > > >     };
> > >
> > > Can you try this queue3 with priority 0x8?
> > >
> > Thanks for the pointer, but unfortunately that didt help (complete
> > boot log https://urldefense.com/v3/__https://pastebin.com/5Fk0vmwa__;!!A4F2R9G_pg!dXl2MXrv1PQeNlAlV9-E-gEBgEF2xNPOWUC8pCa0WFor9hC-KFRIJl8clk7v1sLgpAeReI0cfH9wNOHrdHqP0mi0sDevxQ$ )
>
> Ok. Then I would suggest you try with just x1 queue and confirm if it still happens.
>
I did confirm, this still happens with the 1x queue.

> If it does, then maybe a bisect will help.
Yes I think that's the only way to resolve this.

Cheers,
Prabhakar