From owner-freebsd-net@freebsd.org Mon Jun 26 13:28:19 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 D736BD8715B; Mon, 26 Jun 2017 13:28:19 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from forward5j.cmail.yandex.net (forward5j.cmail.yandex.net [IPv6:2a02:6b8:0:1630::18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "forwards.mail.yandex.net", Issuer "Yandex CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7083C79618; Mon, 26 Jun 2017 13:28:19 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from smtp1m.mail.yandex.net (smtp1m.mail.yandex.net [77.88.61.132]) by forward5j.cmail.yandex.net (Yandex) with ESMTP id 5E92420EAC; Mon, 26 Jun 2017 16:28:08 +0300 (MSK) Received: from smtp1m.mail.yandex.net (localhost.localdomain [127.0.0.1]) by smtp1m.mail.yandex.net (Yandex) with ESMTP id D32AA63C0F61; Mon, 26 Jun 2017 16:28:06 +0300 (MSK) Received: by smtp1m.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id TNF1vv7VYM-S5X4233p; Mon, 26 Jun 2017 16:28:05 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1498483685; bh=YDJYvliDEulS1o4liFPL19zv/iJDJX1hqtF0z7hzcBA=; h=Subject:To:Cc:References:From:Message-ID:Date:In-Reply-To; b=KH8C6X7XlFLqX8TF3QKLlzQVbr1p0hTT5y6ZHFWqaJLBCwhNB5pWdlLdQKHaawmOB IIdtueBj+6DvneXkhtuT9bZiMQFC8ZiNWiL9ztALChnNWb2zB+3+IIdZPYuTx+s9PH yCI5N2LvrRusuR3FLB9OcL8R6T3xZkfmglhx3HuU= Authentication-Results: smtp1m.mail.yandex.net; dkim=pass header.i=@yandex.ru X-Yandex-Suid-Status: 1 0,1 0,1 0,1 0 Subject: Re: mbuf_jumbo_9k & iSCSI failing To: Ben RUBSON Cc: Ryan Stone , FreeBSD Net , "freebsd-scsi@freebsd.org" 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> From: "Andrey V. Elsukov" Openpgp: id=E6591E1B41DA1516F0C9BC0001C5EA0410C8A17A Message-ID: Date: Mon, 26 Jun 2017 16:25:28 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.0.1 MIME-Version: 1.0 In-Reply-To: <86D76532-92F4-479C-A714-126D007AD91F@gmail.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="9jWKaCsF82R6ID2MvOwPFP64eGWl7m89A" 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: Mon, 26 Jun 2017 13:28:19 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --9jWKaCsF82R6ID2MvOwPFP64eGWl7m89A Content-Type: multipart/mixed; boundary="xqTNpa3hGbXomXjTul6pEVMVTJWshQCR8"; protected-headers="v1" From: "Andrey V. Elsukov" To: Ben RUBSON Cc: Ryan Stone , FreeBSD Net , "freebsd-scsi@freebsd.org" Message-ID: Subject: Re: mbuf_jumbo_9k & iSCSI failing 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> In-Reply-To: <86D76532-92F4-479C-A714-126D007AD91F@gmail.com> --xqTNpa3hGbXomXjTul6pEVMVTJWshQCR8 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 26.06.2017 16:27, Ben RUBSON wrote: >=20 >> On 26 Jun 2017, at 15:13, Andrey V. Elsukov wrote:= >> >> I think it is not mlxen specific problem, we have the same symptoms wi= th >> 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 ? Yes. --=20 WBR, Andrey V. 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