From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E29C6C432C3 for ; Thu, 21 Nov 2019 12:16:53 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 843C0208A3 for ; Thu, 21 Nov 2019 12:16:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=xenosoft.de header.i=@xenosoft.de header.b="iRhoZvGh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 843C0208A3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xenosoft.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 040D26B0311; Thu, 21 Nov 2019 07:16:53 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id F33C66B0316; Thu, 21 Nov 2019 07:16:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DFC236B0318; Thu, 21 Nov 2019 07:16:52 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0244.hostedemail.com [216.40.44.244]) by kanga.kvack.org (Postfix) with ESMTP id CB1846B0311 for ; Thu, 21 Nov 2019 07:16:52 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 4EF8E180AD81A for ; Thu, 21 Nov 2019 12:16:52 +0000 (UTC) X-FDA: 76180183464.16.smile48_58f8b63e1fd33 X-HE-Tag: smile48_58f8b63e1fd33 X-Filterd-Recvd-Size: 3540 Received: from mo4-p01-ob.smtp.rzone.de (mo4-p01-ob.smtp.rzone.de [81.169.146.167]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Thu, 21 Nov 2019 12:16:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1574338609; s=strato-dkim-0002; d=xenosoft.de; h=In-Reply-To:Date:Message-ID:From:References:Cc:To:Subject: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=AxkjqpX58AUIucsroDUl2nypkVTcNCP8/zSs6m4uJM0=; b=iRhoZvGhpMveoDg2JZJBYWX0tlKrnZWlLmoQSTofSSGdqTtcJ4ueWxHQ9pgiUzObyU mclYi8thr+BAoxHgUyZ1EvbYVRjKxQgMhv4+FlhBdyo2Bx6pPmFXTcVhEFiR0ciIN3Ox jCfdnlEEkDeA6Eogqo/XWwGWNVufDQnBRdS7sDdrkmTJHjchVDG7iNQCir7pJ4OJWnq6 LUH7WBe8wDIiZVzIT6yPhTexWqNeSfzRJ97hQVkbsSq3bumTVmzbP/AstbmHkh9xOScf ZpvZhpPY897o0KosZ/dWtRLX+O/8b4FrW1ARhX0zNiJkJ/ObMuXjktaYdxBLHoSOY3q5 cN5w== X-RZG-AUTH: ":L2QefEenb+UdBJSdRCXu93KJ1bmSGnhMdmOod1DhGM4l4Hio94KKxRySfLxnHfJ+Dkjp5DdBJSrwuuqxvPgBcsBrTF1qGB6TwVFx4Pq4s7A=" X-RZG-CLASS-ID: mo00 Received: from [IPv6:2a02:8109:89c0:ebfc:bd57:573a:d50f:b5] by smtp.strato.de (RZmta 44.29.0 AUTH) with ESMTPSA id q007c8vALCGdiTu (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Thu, 21 Nov 2019 13:16:39 +0100 (CET) Subject: Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M To: Christoph Hellwig Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Benjamin Herrenschmidt , paulus@samba.org, darren@stevens-zone.net, "contact@a-eon.com" , rtd2@xtra.co.nz, mad skateman , Rob Herring , linuxppc-dev , nsaenzjulienne@suse.de References: <20191121072943.GA24024@lst.de> From: Christian Zigotzky Message-ID: Date: Thu, 21 Nov 2019 13:16:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20191121072943.GA24024@lst.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: de-DE Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.014170, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 21 November 2019 at 08:29 am, Christoph Hellwig wrote: > On Sat, Nov 16, 2019 at 08:06:05AM +0100, Christian Zigotzky wrote: >> /* >> * DMA addressing mode. >> * >> * 0 : 32 bit addressing for all chips. >> * 1 : 40 bit addressing when supported by chip. >> * 2 : 64 bit addressing when supported by chip, >> * limited to 16 segments of 4 GB -> 64 GB max. >> */ >> #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRE= SSING_MODE >> >> Cyrus config: >> >> CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=3D1 >> >> I will configure =E2=80=9C0 : 32 bit addressing for all chips=E2=80=9D= for the RC8. Maybe this is the solution. > 0 means you are going to do bounce buffering a lot, which seems > generally like a bad idea. > > But why are we talking about the sym53c8xx driver now? The last issue > you reported was about video4linux allocations. > Both drivers have the same problem. They don't work if we have more than=20 3.5GB RAM. I try to find a solution until your have a good solution. I=20 have already a solution for V4L but I still need one for the sym53c8xx=20 driver.