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Tue, 06 Oct 2026 13:00:18 -0700 (PDT) Received: from localhost ([2a03:2880:2ff:9::]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a89b7727a1sm951252a91.17.2026.10.06.13.00.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2026 13:00:16 -0700 (PDT) Date: Tue, 6 Oct 2026 13:00:15 -0700 From: Joe Damato To: anmory Cc: netdev@vger.kernel.org, michael.chan@broadcom.com, pavan.chebbi@broadcom.com, linux-kernel@vger.kernel.org Subject: Re: [RFC net v4 0/4] bnxt_en: Make RING FREE more robust Message-ID: Mail-Followup-To: Joe Damato , anmory , netdev@vger.kernel.org, michael.chan@broadcom.com, pavan.chebbi@broadcom.com, linux-kernel@vger.kernel.org References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Oct 06, 2026 at 04:43:42PM +0000, anmory wrote: > Hi Joe, > > we appear to be hitting a very similar issue to the one described in > this RFC on two Broadcom BCM57504 systems. > > One detail that may be particularly relevant is the ordering in our > reproductions: on both systems the AMD-Vi IO_PAGE_FAULT occurs before > the NETDEV WATCHDOG / TX timeout. > > We originally encountered the problem after updating from Debian > 6.12.107-1 to 6.12.111-1. > > We subsequently reproduced it deliberately on two separate systems. Can you provide a sample program or explanation on how *exactly* to reproduce this issue? I've hit the same one you are describing (IO_PAGE_FAULT before the NETDEV TX timeout) but have not been able to reliably reproduce it. It happens fairly rarely on my systems, but I am very eager to debug this and fix it. If you have a way to reliably reproduce this, that would make it *much* easier to debug. Thanks, Joe