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[2603:6000:a401:3a00:223:24ff:fe37:c4d7]) by smtp.gmail.com with ESMTPSA id i17sm1546982qtr.33.2021.03.24.07.22.19 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Mar 2021 07:22:20 -0700 (PDT) Subject: Re: Data corruption via IPoIB in connected mode between Linux and FreeBSD To: freebsd-infiniband@freebsd.org References: <68a1d236-45d9-5343-5ad6-9fee877f5ff1@selasky.org> From: Jason Bacon Message-ID: <64c041f8-4e75-7e61-6689-c37fc72235f4@gmail.com> Date: Wed, 24 Mar 2021 09:21:05 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <68a1d236-45d9-5343-5ad6-9fee877f5ff1@selasky.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Rspamd-Queue-Id: 4F59Rd5x1tz4YBm X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=nLPvQdaG; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of bacon4000@gmail.com designates 2607:f8b0:4864:20::72b as permitted sender) smtp.mailfrom=bacon4000@gmail.com X-Spamd-Result: default: False [-0.23 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::72b:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-infiniband@freebsd.org]; NEURAL_SPAM_MEDIUM(1.00)[1.000]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::72b:from:127.0.2.255]; NEURAL_SPAM_SHORT(0.77)[0.773]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::72b:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-infiniband] X-BeenThere: freebsd-infiniband@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Infiniband on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Mar 2021 14:22:22 -0000 On 3/24/21 2:53 AM, Hans Petter Selasky wrote: > Try setting the MTU to 9000 instead. Using such a large MTU with > FreeBSD doesn't make sense. In my experience a while back, large MTUs caused temporary hangups. 64k was extremely unstable, 32k somewhat unstable, and 16k seemed OK. -- Earth is a beta site.