From owner-freebsd-net@freebsd.org Sun Jun 25 15:28:35 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 70BE7D93D9E; Sun, 25 Jun 2017 15:28:35 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wr0-x242.google.com (mail-wr0-x242.google.com [IPv6:2a00:1450:400c:c0c::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 138E373842; Sun, 25 Jun 2017 15:28:34 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wr0-x242.google.com with SMTP id 77so24896158wrb.3; Sun, 25 Jun 2017 08:28:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=N1VzSMP7GTIsjlChBfgT/1wq+KUsh8jOhru8CYgipyE=; b=Xm5XC7/G6JyInbRznqfLTEnabQYYxipTSoRcb84BMNBq7y/8GxdBOl9dal9Jr4V5a3 y6/OSkBjUKUQBN6b4BNiUf+Gm4ctsHgJrjgoDup17KXzWinU07A2jj8CET8o/l3Joy6t d6vS5tywKM4bHmofeGikK+gptWyVd1KaoUfVsEhk00ENDUyjFN6sdjadbSV0xo//SzLr FVtrme+iUhXMIZxXYxk1dIgDlHhnYOXAlRy8FK/vtLPf/qQAcWC9570WJybZu9oOx5pp /aNZ0+wq7yNkdoYpiC3+XX+n8BdACk/tqi3KqIdeEf0QmYtTarDYKPFZB34EeKh4o8EU Dyxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=N1VzSMP7GTIsjlChBfgT/1wq+KUsh8jOhru8CYgipyE=; b=LZwlA9tzGAHfF/x3dYFVWlpzoHhTZSzsfuvegKHUJl+r83p0NL3yqDQ4B8PEYYJezW emRh02m4EiblSyJyM2eFUbn8hxLZW3gx6JJISt6hjPhx55YdsW5BIwmCCBOCogu+d9tc +lylFwcnoRBdjmsPeEY1ggvSwI3LygtkT2c1hCNcBWeVSvYjILWq+irhzj8bKb324Nt5 PdBvZVJedInFCAEe0RZe2ijknzTVjlEzWxhFxPb3e//lYADDFzV0LCGoapJ8tr8wqVVN 5IiVv0pd/PyFhvVnT+7hNUq1DHBV+oETr2eakdjCHtUJzDw2g5jgGLONVvLTxcS+EX3j adZQ== X-Gm-Message-State: AKS2vOznj4kNtJM6wvH72KAAxDf4ghUHJJVWKMyPZEecwwQIk7Ev8r1m BTusItBYPGH+K9UDrxo= X-Received: by 10.28.10.194 with SMTP id 185mr10363386wmk.119.1498404513492; Sun, 25 Jun 2017 08:28:33 -0700 (PDT) Received: from ben.home (LFbn-1-7159-4.w90-116.abo.wanadoo.fr. [90.116.90.4]) by smtp.gmail.com with ESMTPSA id o6sm6159918wrc.48.2017.06.25.08.28.32 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 25 Jun 2017 08:28:32 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Subject: Re: mbuf_jumbo_9k & iSCSI failing From: Ben RUBSON In-Reply-To: Date: Sun, 25 Jun 2017 17:28:32 +0200 Cc: FreeBSD Net , "freebsd-scsi@freebsd.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: <486A6DA0-54C8-40DF-8437-F6E382DA01A8@gmail.com> <6a31ef00-5f7a-d36e-d5e6-0414e8b813c7@selasky.org> <613AFD8E-72B2-4E3F-9C70-1D1E43109B8A@gmail.com> <2c9a9c2652a74d8eb4b34f5a32c7ad5c@AM5PR0502MB2916.eurprd05.prod.outlook.com> <52A2608C-A57E-4E75-A952-F4776BA23CA4@gmail.com> <9B507AA6-40FE-4B8D-853F-2A9422A2DF67@gmail.com> To: Ryan Stone X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jun 2017 15:28:35 -0000 > On 25 Jun 2017, at 17:14, Ryan Stone wrote: >=20 > Is this setup using the mlx4_en driver? If so, recent versions of = that driver has a regression when using MTUs greater than the page size = (4096 on i386/amd64). The bug will cause the card to drop packets when = the system is under memory pressure, and in certain causes the card can = get into a state when it is no longer able to receive packets. I am = working on a fix; I can post a patch when it's complete. Thank you very much for your feedback Ryan. Yes, my system is using mlx4_en driver, the one directly from FreeBSD = 11.0 sources tree. Any indicator I could catch to be sure I'm experiencing the issue you = are working on ? Sounds like anyway I may be suffering from it... Of course I would be glad to help testing your patch when it's complete. Thank you again, Ben