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Date: Mon, 13 Apr 2026 11:02:22 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Cc: Andrew Lunn <andrew@lunn.ch>, Alexandre Torgue
 <alexandre.torgue@foss.st.com>, Andrew Lunn <andrew+netdev@lunn.ch>, "David
 S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
 linux-arm-kernel@lists.infradead.org,
 linux-stm32@st-md-mailman.stormreply.com, netdev@vger.kernel.org, Paolo
 Abeni <pabeni@redhat.com>, Sam Edwards <cfsworks@gmail.com>
Subject: Re: [PATCH net-next] net: stmmac: enable RPS and RBU interrupts
Message-ID: <20260413110222.49fc3759@kernel.org>
In-Reply-To: <E1wBBaR-0000000GZHR-1dbM@rmk-PC.armlinux.org.uk>
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On Fri, 10 Apr 2026 14:07:51 +0100 Russell King (Oracle) wrote:
> Since we are seeing receive buffer exhaustion on several platforms,
> let's enable the interrupts so the statistics we publish via ethtool -S
> actually work to aid diagnosis. I've been in two minds about whether
> to send this patch, but given the problems with stmmac at the moment,
> I think it should be merged.

Sorry for a under-research response but wasn't there are person trying
to fix the OOM starvation issue? Who was supposed to add a timer?
Is your problem also OOM related or do you suspect something else?

Firing interrupts when Rx fill ring runs dry (which IIUC this patches
dies?) is not a good idea.