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([2601:646:8f02:5350:ce4:701d:f6e3:3a6b]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13e7275973dsm20107506c88.15.2026.07.30.09.46.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 30 Jul 2026 09:46:27 -0700 (PDT) Message-ID: <81e5156d-1619-4892-ac29-e8bb11acd494@gmail.com> Date: Thu, 30 Jul 2026 09:46:26 -0700 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next V4] selftests: drv-net: Test queue stall upon reconfig To: Jakub Kicinski Cc: netdev@vger.kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, shuah@kernel.org, linux-kselftest@vger.kernel.org, dw@davidwei.uk References: <20260725002156.3027762-1-mohsin.bashr@gmail.com> <20260729191014.2634ab1e@kernel.org> Content-Language: en-US From: Mohsin Bashir In-Reply-To: <20260729191014.2634ab1e@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/29/26 7:10 PM, Jakub Kicinski wrote: > On Fri, 24 Jul 2026 17:21:55 -0700 Mohsin Bashir wrote: >> +# TX ring size the test shrinks to so the ring fills quickly. >> +MIN_TX_RING = 64 > > Testing against bnxt is failing in NIPA, could you check why? > I suspect the rings size may be too small (hence the quote). > There was a recent patch to Intel drivers to require min ring of 128 > so we may need to try a few values ([32, 64, 128, 256]?) before > giving up? Thanks for the pointer. Your suspicion is correct. Broadcom does not allow tx ring size to be < 420 when we have software based udp segmentation. I'll harden the test accordingly.