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Miller" , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , "Russell King (Oracle)" , Nazim Amirul , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20261102080938.2955-1-magnusleatti@kernelriot.com> <805aeb73d9e32b237bcb30c8fd44ffed@tipi-net.de> Content-Language: en-US From: Maxime Chevallier In-Reply-To: <805aeb73d9e32b237bcb30c8fd44ffed@tipi-net.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 Hi, On 11/2/26 09:29, Nicolai Buchwitz wrote: > Hi Magnus > > On 2.11.2026 09:09, Magnus Leatti wrote: > >> [...] > >> Russell, d3265c19b35d ("net: stmmac: xgmac2: disable RBUE in default RX >> interrupt mask") describes a similar storm on xgmac2. Should dwmac4 do >> the same? I have only tested the glue change. > > AFAIU RBU is the cause. Dropping it in dwmac4, as Russel did in  d3265c19b35d, > would cover all multi-MSI users. As I commented, the other solution is to properly ack it. I'm not convinced about the RBU interrupt's usefulness TBH, even when ack'd it makes a bad situation even worse, but it does have the nice effect of making this visible by incrementing the associated counter. Anyway, this issue should be covered by this : https://lore.kernel.org/all/20261030102251.208929-1-maxime.chevallier@bootlin.com/ Maxime