Received: by 2002:a25:7ec1:0:0:0:0:0 with SMTP id z184csp1701735ybc; Wed, 13 Nov 2019 03:03:19 -0800 (PST) X-Google-Smtp-Source: APXvYqxswTvXnjNg3zzHjHjxblPX+p7kJf/cYc3ptjNlwfhyjWO8KGlOQV/J5YhND+JcZS32oRWr X-Received: by 2002:aa7:d552:: with SMTP id u18mr2844269edr.86.1573642999311; Wed, 13 Nov 2019 03:03:19 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1573642999; cv=none; d=google.com; s=arc-20160816; b=FaEiUERQIHE2V6oZLqj9rk+nkaU26iUpqItr/dP8PqnM5+7BRgEu6QEGOBRrCX4OMx DLUA9ZmMEmudBWwy4qYA24TXTyLxT17ydHXD+bEGv08AR7fogUnVfmT0SkH5x6QUND/f 0Epwha0Vdd1RZmn4LSc1xmGKzRuFfsHVmbU71B5gnZMgHzBRrPlCk5GOTetgFsG2zLYB vagz9KoVtbf039gCyaplPt9vCz5/pnq+EUJIwSCAl/NRQ7bsYb/uyTNBekAPZJMEM5ig XyfbLb6469/YkWX9jICRAIKRZo7RhLHujnYCGTXnXV6SP4kxVbdUmdxn3Q7TshSfYnoL IR6w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=SvJX5mhrWaMdc6sj68GWZom6jGaXV2v7iM7wpHuefz4=; b=0qI6TctleiC5ndm9qg2RjWxP6C8+6FCq1sOPSnzlVfmpekOuiVVD8VRdDG8YBaT6xE qcmqLwGh++pGPXvpTzjYBuGWPIhktJlvGAMnmW0igCC5aOeCR/2ytqu3N0m562LsirZt mb0VRhviMUCKbvsiXSrz+OvEfPiVqzIffDOq0YW9mHMdTknZboftUM5Ngye6f9IxNc5G 9TUh1qj9u2Zgm6vsnR93FIYBPzMuJueYSLUB3jytyNDdBaJgOOY6uwOI68cWCPoo99PE h1Tr4iDgiUaldPveY5vexS5lcDA1iTDLIbTizdjAdo9/e34c4qqfQYkhIicL+1lSuvP/ dlBw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z15si868254eju.310.2019.11.13.03.02.55; Wed, 13 Nov 2019 03:03:19 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727722AbfKMLCM (ORCPT + 99 others); Wed, 13 Nov 2019 06:02:12 -0500 Received: from verein.lst.de ([213.95.11.211]:33598 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726165AbfKMLCM (ORCPT ); Wed, 13 Nov 2019 06:02:12 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 1BF6268AFE; Wed, 13 Nov 2019 12:02:08 +0100 (CET) Date: Wed, 13 Nov 2019 12:02:07 +0100 From: Christoph Hellwig To: Christian Zigotzky Cc: Christoph Hellwig , 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 Subject: Re: Bug 205201 - overflow of DMA mask and bus mask Message-ID: <20191113110207.GA7280@lst.de> References: <3504ee70-02de-049e-6402-2d530bf55a84@xenosoft.de> <46025f1b-db20-ac23-7dcd-10bc43bbb6ee@xenosoft.de> <20191105162856.GA15402@lst.de> <2f3c81bd-d498-066a-12c0-0a7715cda18f@xenosoft.de> <0c5a8009-d28b-601f-3d1a-9de0e869911c@xenosoft.de> <20191112144109.GA11805@lst.de> <9b14ca1b-2d5d-52b5-c7b4-0e637dbb1157@xenosoft.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9b14ca1b-2d5d-52b5-c7b4-0e637dbb1157@xenosoft.de> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Interesting. Give me some time to come up with a real fix, as drivers really should not mess with GFP flags for these allocations, and even if they did swiotlb is supposed to take care of any resulting problems.