From owner-freebsd-scsi@freebsd.org Mon Jun 26 13:29:51 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 A0137D8725B; Mon, 26 Jun 2017 13:29:51 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) (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 2C1357972D; Mon, 26 Jun 2017 13:29:51 +0000 (UTC) (envelope-from ben.rubson@gmail.com) Received: by mail-wm0-x22d.google.com with SMTP id 62so1366155wmw.1; Mon, 26 Jun 2017 06:29:51 -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=6rcpEB/MMsV7jfh73S50iuteAuxdvGYhwUPWXJNu33k=; b=eJN1C5yk9Fu2CBWogpToPkxhW5Sl48pHpqP6qHNQTN3qfN4TCWk6JEodUiWrxp79sE kL8VPp6TFij8yyZ9JZ833hTb7BW9aKpA98NcggQAsIXKbaZ8D/V+MeZGBiBG7OU47pjU iqXwt+hGXWMGWvsXVB8NPbWjHUN0ntqWnC+D4Xz/HfNam8Ba4Vu8fxg6AcCcANm4GgVz kQwRqOCIchs1GtiC8Ys/PA7RA2ropciPWplOH2Zei7Ch1GgGZH7i26jIpoJCPoabAT30 EWGoH7ADYbL4cJy//b+pjeOeA+YY1QU2yND87m8G9Y2ExrQi3kAfBSJr2I5P5/xxA3Oi Fbjg== 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=6rcpEB/MMsV7jfh73S50iuteAuxdvGYhwUPWXJNu33k=; b=A+eZ0gG+uNWQ77/hSN1MB2mjmjDxZOtdml6NHKN2lY6g9ECyoQ9ghtuU3By9y/PiDU aawnILIJneVcIyIcxlT2YN6vDnHqSQMgjbMScOYZvTFN7XIQR3T+3AFrCAMQpFQvY1aE Wpqnn8tf8CA9yQ4abheGRy7Z6RzPU8SobPSBXocJwQjNZtnWklE7GeMMmTdiiqNAa8S4 zGCYyoWTfx0BXvPtG9fnHtm9NH1HPG4xOxGMMM9LGhPHlK3tDSR+MiYUqnG5lmaQkYsm nlk1SYOEZHqulwZ7yLg8BA37F/HDjcij2JePiXgThul1AUN4UeAG81ZvCoHN24q5YImW LIfA== X-Gm-Message-State: AKS2vOy9aZQHgtnFMdDDDtyT6wXjYFUhw58uDh5TPiAmlqmVIgZjWFp5 fxEQ1uII/ryOPw== X-Received: by 10.28.136.4 with SMTP id k4mr117790wmd.4.1498483789545; Mon, 26 Jun 2017 06:29:49 -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 x71sm109771wmd.32.2017.06.26.06.29.48 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 26 Jun 2017 06:29:49 -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: Mon, 26 Jun 2017 15:29:48 +0200 Cc: Ryan Stone , 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> <64abec26-e310-d66d-93ae-3536914ddd84@yandex.ru> <86D76532-92F4-479C-A714-126D007AD91F@gmail.com> 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 13:29:51 -0000 > On 26 Jun 2017, at 15:25, Andrey V. Elsukov wrote: >=20 > On 26.06.2017 16:27, Ben RUBSON wrote: >>=20 >>> 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. >>=20 >> 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 ? >=20 > Yes. Is it a kernel patch or a driver/ixgbe patch ?=