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=-2.2 required=3.0 tests=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 1B1C7C0044D for ; Wed, 4 Dec 2019 08:56:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D991320675 for ; Wed, 4 Dec 2019 08:56:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D991320675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 92C8A6B09B3; Wed, 4 Dec 2019 03:56:39 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8DC476B09B4; Wed, 4 Dec 2019 03:56:39 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7CA9B6B09B5; Wed, 4 Dec 2019 03:56:39 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0234.hostedemail.com [216.40.44.234]) by kanga.kvack.org (Postfix) with ESMTP id 633A46B09B3 for ; Wed, 4 Dec 2019 03:56:39 -0500 (EST) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id C44F18248D52 for ; Wed, 4 Dec 2019 08:56:38 +0000 (UTC) X-FDA: 76226853276.07.ants23_74281557f5e2d X-HE-Tag: ants23_74281557f5e2d X-Filterd-Recvd-Size: 2731 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf21.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Dec 2019 08:56:38 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id A08A768BFE; Wed, 4 Dec 2019 09:56:34 +0100 (CET) Date: Wed, 4 Dec 2019 09:56:34 +0100 From: Christoph Hellwig To: Mike Rapoport Cc: Christoph Hellwig , Christian Zigotzky , Robin Murphy , linux-arch@vger.kernel.org, darren@stevens-zone.net, mad skateman , Benjamin Herrenschmidt , linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rob Herring , paulus@samba.org, rtd2@xtra.co.nz, "contact@a-eon.com" , linuxppc-dev , nsaenzjulienne@suse.de Subject: Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M Message-ID: <20191204085634.GA25929@lst.de> References: <6eec5c42-019c-a988-fc2a-cb804194683d@xenosoft.de> <20191121180226.GA3852@lst.de> <2fde79cf-875f-94e6-4a1b-f73ebb2e2c32@xenosoft.de> <20191125073923.GA30168@lst.de> <4681f5fe-c095-15f5-9221-4b55e940bafc@xenosoft.de> <20191126164026.GA8026@lst.de> <20191127065624.GB16913@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191127065624.GB16913@linux.ibm.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Nov 27, 2019 at 08:56:25AM +0200, Mike Rapoport wrote: > On Tue, Nov 26, 2019 at 05:40:26PM +0100, Christoph Hellwig wrote: > > On Tue, Nov 26, 2019 at 12:26:38PM +0100, Christian Zigotzky wrote: > > > Hello Christoph, > > > > > > The PCI TV card works with your patch! I was able to patch your Git kernel > > > with the patch above. > > > > > > I haven't found any error messages in the dmesg yet. > > > > Thanks. Unfortunately this is a bit of a hack as we need to set > > the mask based on runtime information like the magic FSL PCIe window. > > Let me try to draft something better up, and thanks already for testing > > this one! > > Maybe we'll simply force bottom up allocation before calling > swiotlb_init()? Anyway, it's the last memblock allocation. So I think we should go with this fix (plus a source code comment) for now. Revamping the whole memory initialization is going to take a while, and this fix also is easily backportable.