From owner-freebsd-scsi@freebsd.org Mon Jun 26 13:27:12 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 02E82D87071; Mon, 26 Jun 2017 13:27:12 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wr0-x22c.google.com (mail-wr0-x22c.google.com [IPv6:2a00:1450:400c:c0c::22c]) (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 936FF79506; Mon, 26 Jun 2017 13:27:11 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wr0-x22c.google.com with SMTP id 77so144753916wrb.1; Mon, 26 Jun 2017 06:27:11 -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=L/8RwOIW8TnkqeTb/juk5I5r3hOn5WAsY5Ym+odT6Qw=; b=VzOnwldmkuC6wbBYbuQ3krqYJtm3fkOtvj56d0D/jgR6+rRnCKZFd8PnAbh7DJ3SA4 6CpPImnK5xeVdLTpC4xeT4VCgCVfKUYzp/jNbSr1FwxvEiQ6+KmsBaSQHCY/oPmNBgE0 Brt7806mZqXV65FANpOOKX0rJM6QF2dhvP+87Rm8BGhT7rf31foYXk16mRqJbujjU0wP 5/qQK3k8TsLgyIlF3gzlon+UEbrONpV2WZ9tZcNzIUlx1mkwXXtneyN8TZ07SIi/2kx6 6f+2YVTFUtCwtDfb79Zu589mUozBRfUEyofIZd8KKSfRRmEwXBTf8cZxNyTzYVlE6MJu rmPQ== 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=L/8RwOIW8TnkqeTb/juk5I5r3hOn5WAsY5Ym+odT6Qw=; b=CNqi09MtqItPkLTZQQTG2onfRxwIHyqy/8x0uQo+l+ecMkKQaG/7r08UVxyEHyf82l 2/4CYdO28aIrmLpFoLDE6E7WnsrRuW1fH6YjuWIUP5bOcAlCkb1alA804QW37MQaEyf0 UI4DODgzpNXjnlr2D6IjjPTqB1CmXkPFNTCJTg+NU9J9t0tBNpBmoFDNFPIPL+Ikxwgl PglWu+BU1ZHzRg4bQNU3i6bfsYGZfuugRmKJgseAPe0Xns+0tgIKXzfY1D5CSOmzUOSn Ho+wyIoyJcpg1ILDpkqeU7aXsNVwv08XEPmvi7K+OCflEfwg0GE0Hg7UD2i94fp/Zff2 yMCg== X-Gm-Message-State: AKS2vOzh+XBHdpzPG4y7NrY9GHlZkZRHdlUO0v48mkZKSAKtYX5BqG3L vc74UpnCsiHLgQ== X-Received: by 10.223.176.61 with SMTP id f58mr13231360wra.74.1498483629840; Mon, 26 Jun 2017 06:27:09 -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 p34sm10079679wrc.66.2017.06.26.06.27.08 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 26 Jun 2017 06:27:09 -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: <64abec26-e310-d66d-93ae-3536914ddd84@yandex.ru> Date: Mon, 26 Jun 2017 15:27:07 +0200 Cc: Ryan Stone , FreeBSD Net , "freebsd-scsi@freebsd.org" Content-Transfer-Encoding: quoted-printable Message-Id: <86D76532-92F4-479C-A714-126D007AD91F@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> <64abec26-e310-d66d-93ae-3536914ddd84@yandex.ru> To: "Andrey V. Elsukov" X-Mailer: Apple Mail (2.3124) 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: Mon, 26 Jun 2017 13:27:12 -0000 > On 26 Jun 2017, at 15:13, Andrey V. Elsukov wrote: >=20 > I think it is not mlxen specific problem, we have the same symptoms = with > ixgbe(4) driver too. To avoid the problem we have patches that are > disable using of 9k mbufs, and instead only use 4k mbufs. Interesting feedback Andrey, thank you ! The problem may be then "general". So you still use large MTU (>=3D9000) but only allocating 4k mbufs, as a = workaround ?=