From owner-freebsd-scsi@freebsd.org Sun Jun 25 15:14:08 2017 Return-Path: Delivered-To: freebsd-scsi@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 8C784D938F3; Sun, 25 Jun 2017 15:14:08 +0000 (UTC) (envelope-from rysto32@gmail.com) Received: from mail-it0-x236.google.com (mail-it0-x236.google.com [IPv6:2607:f8b0:4001:c0b::236]) (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 46486730B7; Sun, 25 Jun 2017 15:14:08 +0000 (UTC) (envelope-from rysto32@gmail.com) Received: by mail-it0-x236.google.com with SMTP id m84so12725525ita.0; Sun, 25 Jun 2017 08:14:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=0Y33zcri/NfWAWZUmPaK9x6nbkgvzR6xwBm4MjKLF5k=; b=XSRnqiUz2Qn0zjXkUE6lGWl8qzumHijXNtl2mphiybXwUuHPnztgRSy8btsxq/0xaP +bgCmVze/74NaiT6d5PCqyaDPPEsILNIrhabOXdKAmsfgtlSbJFw0muugt9P8KIl0b1R F19L15mkg57K0+x0GE2F1aZgGIH/UmztIFICvmz80RR8f6cZoajSizoszLC9Qw4l+w6z fdP9LzVkgTrGo1+25gABG34NymosYB9MtHgcNqq79ZHVT/AwmTX6mSvUZKZFPEwWjSbv LAJnZyxPT0759q6upU8YJ7nZV6YYAk9AEbgtrXG/wZR5a/doIp/y1WxmiU4d+WARue0S oqoQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=0Y33zcri/NfWAWZUmPaK9x6nbkgvzR6xwBm4MjKLF5k=; b=iDnDzpBDIjaGPtaWLSwDMnwRZQGs2tifb4i2gv58peoqD8JAUR6uZe5L4TPuPgpKcC uJPCW7dxb4OccWdHxyOKW4/DyN+I8s/ehAV5K7s1F2yvtIv2JwhXkJKqlSyhVP28noUk DQ+7kD/J3nXZUrL4qE4HYK6DsialF+990eDDkHc5475jtH6YkgYKDMKHWcj7VtC7B0Yc C2hh37x9VxEFyzBQDL0NmIRQR1oDAjS09HUUzYaFJcEvCh5ea/WR0X4B6BlMoThgiU2X t1n9Lg0cNu+MspNF0QoDeNzcbjosLtVwi6RE+5kanmCGxMz1iZW/AOzlOo7hNDK6KD35 HnPg== X-Gm-Message-State: AKS2vOw0NyPb+yHULPnN1jkHORu5LQ8Eb3xKzCxtcsm3wC64T2d5Hv/6 EHUJIwkuwfHy1ENu/Fsi+ajTqZDaLQ== X-Received: by 10.36.254.134 with SMTP id w128mr6216777ith.2.1498403647595; Sun, 25 Jun 2017 08:14:07 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.156.21 with HTTP; Sun, 25 Jun 2017 08:14:07 -0700 (PDT) In-Reply-To: <9B507AA6-40FE-4B8D-853F-2A9422A2DF67@gmail.com> 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> From: Ryan Stone Date: Sun, 25 Jun 2017 11:14:07 -0400 Message-ID: Subject: Re: mbuf_jumbo_9k & iSCSI failing To: Ben RUBSON Cc: FreeBSD Net , "freebsd-scsi@freebsd.org" Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jun 2017 15:14:08 -0000 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.