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 8516AC17447 for ; Wed, 13 Nov 2019 11:02:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5B618222D0 for ; Wed, 13 Nov 2019 11:02:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B618222D0 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 07E276B0005; Wed, 13 Nov 2019 06:02:14 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 02EF26B0006; Wed, 13 Nov 2019 06:02:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E86FA6B0007; Wed, 13 Nov 2019 06:02:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0249.hostedemail.com [216.40.44.249]) by kanga.kvack.org (Postfix) with ESMTP id CF7266B0005 for ; Wed, 13 Nov 2019 06:02:13 -0500 (EST) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id C4A02181AEF1F for ; Wed, 13 Nov 2019 11:02:12 +0000 (UTC) X-FDA: 76150964904.26.cover41_87a7c54dfe404 X-HE-Tag: cover41_87a7c54dfe404 X-Filterd-Recvd-Size: 1874 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf27.hostedemail.com (Postfix) with ESMTP for ; Wed, 13 Nov 2019 11:02:12 +0000 (UTC) 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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.009353, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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.