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,URIBL_BLOCKED,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 96A6AC432C0 for ; Wed, 27 Nov 2019 08:54:03 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6186520665 for ; Wed, 27 Nov 2019 08:54:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6186520665 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 35015854B4; Wed, 27 Nov 2019 08:54:03 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kwKudEkkEVID; Wed, 27 Nov 2019 08:54:02 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 52E05841E9; Wed, 27 Nov 2019 08:54:02 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1AA41C1DDA; Wed, 27 Nov 2019 08:54:02 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2CE24C0881 for ; Wed, 27 Nov 2019 08:54:00 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 15E4985BF7 for ; Wed, 27 Nov 2019 08:54:00 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rmN9LTjRaPoR for ; Wed, 27 Nov 2019 08:53:57 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by whitealder.osuosl.org (Postfix) with ESMTPS id 0225885BD3 for ; Wed, 27 Nov 2019 08:53:56 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id E4D1568AFE; Wed, 27 Nov 2019 09:53:51 +0100 (CET) Date: Wed, 27 Nov 2019 09:53:51 +0100 From: Christoph Hellwig To: Mike Rapoport Subject: Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M Message-ID: <20191127085351.GA24676@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-Disposition: inline In-Reply-To: <20191127065624.GB16913@linux.ibm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: linux-arch@vger.kernel.org, darren@stevens-zone.net, rtd2@xtra.co.nz, Benjamin Herrenschmidt , linuxppc-dev , linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rob Herring , paulus@samba.org, mad skateman , Christian Zigotzky , "contact@a-eon.com" , Robin Murphy , Christoph Hellwig , nsaenzjulienne@suse.de X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Wed, Nov 27, 2019 at 08:56:25AM +0200, Mike Rapoport wrote: > Maybe we'll simply force bottom up allocation before calling > swiotlb_init()? Anyway, it's the last memblock allocation. That should work, but I don't think it is the proper fix. The underlying issue here is that ZONE_DMA/DMA32 sizing is something that needs to be propagated to memblock and dma-direct as is based around addressing limitations. But our zone initialization is such a mess that we can't just reuse a variable. Nicolas has started to clean some of this up, but we need to clean that whole zone initialization mess up a lot more. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu