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=-5.5 required=3.0 tests=BAYES_00, 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 4C7DFC433DF for ; Sat, 1 Aug 2020 08:29:34 +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 1D835206E9 for ; Sat, 1 Aug 2020 08:29:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D835206E9 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 E63A186DF0; Sat, 1 Aug 2020 08:29:33 +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 pfCGdSaT67J8; Sat, 1 Aug 2020 08:29:33 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 105E4868C8; Sat, 1 Aug 2020 08:29:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id EB5B4C0050; Sat, 1 Aug 2020 08:29:32 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 36DD2C004D for ; Sat, 1 Aug 2020 08:29:31 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 25D0788810 for ; Sat, 1 Aug 2020 08:29:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 13IZCMoixtHS for ; Sat, 1 Aug 2020 08:29:29 +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 hemlock.osuosl.org (Postfix) with ESMTPS id 8386D887F8 for ; Sat, 1 Aug 2020 08:29:29 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id E723468C4E; Sat, 1 Aug 2020 10:29:24 +0200 (CEST) Date: Sat, 1 Aug 2020 10:29:24 +0200 From: Christoph Hellwig To: David Rientjes Subject: Re: dma-pool fixes Message-ID: <20200801082924.GA2806@lst.de> References: <20200728120716.GA2507@lst.de> <20200728124114.GA4865@lst.de> <20200728153055.GA16701@lst.de> <18a3b93cc5ba3e0e39ae1b14759ce31121d54045.camel@suse.de> <20200731130903.GA31110@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Amit Pundir , jeremy.linton@arm.com, iommu@lists.linux-foundation.org, linux-rpi-kernel@lists.infradead.org, Robin Murphy , Christoph Hellwig 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 Fri, Jul 31, 2020 at 12:04:28PM -0700, David Rientjes wrote: > On Fri, 31 Jul 2020, Christoph Hellwig wrote: > > > > Hi Nicolas, Christoph, > > > > > > Just out of curiosity, I'm wondering if we can restore the earlier > > > behaviour and make DMA atomic allocation configured thru platform > > > specific device tree instead? > > > > > > Or if you can allow a more hackish approach to restore the earlier > > > logic, using of_machine_is_compatible() just for my device for the > > > time being. Meanwhile I'm checking with other developers running the > > > mainline kernel on sdm845 phones like OnePlus 6/6T, if they see this > > > issue too. > > > > If we don't find a fix for your platform I'm going to send Linus a > > last minute revert this weekend, to stick to the no regressions policy. > > I still hope we can fix the issue for real. > > > > What would be the scope of this potential revert? I've just looked into that and it seems like we need to revert everything pool related back ot "dma-pool: add additional coherent pools to map to gfp mask". _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu