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=-8.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 0E97AC11F68 for ; Mon, 12 Jul 2021 13:57:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5EA1610A7 for ; Mon, 12 Jul 2021 13:57:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234763AbhGLN7t (ORCPT ); Mon, 12 Jul 2021 09:59:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:56802 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234365AbhGLN7p (ORCPT ); Mon, 12 Jul 2021 09:59:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0A31561003; Mon, 12 Jul 2021 13:56:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626098216; bh=KqwO5Vj/j6Fq4TmXSaTqESu5yHRQzrkv3vVFfvNbMGY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=apLKxQ3ase69s99n1r/hg6FOeb+BIYvcXeks3TH0kXFsiV4vt4JUCfZRcjNqqJoI+ C/PtbYfC7V6I9+tFs23xYS40pB1IE1Ru0GO/sR7kIL+zLBxUujKnwvKpXUPJuSJZEH W/rAB9EgGt57/FadwbxksE14xUlBKeyWZI/Wnb4Nnt0t5RD8RNJlUOkSuzegkOaEqs Qc6OK9PK6WVdefs+A+PDuKLzETeUU+bVabgaTyboguU6s7wHGEC28+izJWHslIy77f yr0fKTdfH84fcYgWwvMeJ8lGvcnMqQz4hxapleBU2sKhQTn0GZErsyzP3AbO0nm6/5 eLx4kI3jlwL/w== Date: Mon, 12 Jul 2021 14:56:45 +0100 From: Will Deacon To: Konrad Rzeszutek Wilk Cc: Christoph Hellwig , Robin Murphy , heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, Stefano Stabellini , Saravana Kannan , mpe@ellerman.id.au, "Rafael J . Wysocki" , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , Jianxiong Gao , Daniel Vetter , maarten.lankhorst@linux.intel.com, airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, Nathan Chancellor , Rob Herring , rodrigo.vivi@intel.com, Bjorn Helgaas , Claire Chang , boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , Qian Cai , lkml , "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, Tom Lendacky , bauerman@linux.ibm.com Subject: Re: [PATCH v15 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing Message-ID: <20210712135645.GA28881@willie-the-truck> References: <0f7bd903-e309-94a0-21d7-f0e8e9546018@arm.com> <20210705190352.GA19461@willie-the-truck> <20210706044848.GA13640@lst.de> <20210706132422.GA20327@willie-the-truck> <20210706140513.GA26498@lst.de> <20210706165720.GC20750@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 06, 2021 at 12:59:57PM -0400, Konrad Rzeszutek Wilk wrote: > On Tue, Jul 06, 2021 at 05:57:21PM +0100, Will Deacon wrote: > > On Tue, Jul 06, 2021 at 10:46:07AM -0400, Konrad Rzeszutek Wilk wrote: > > > On Tue, Jul 06, 2021 at 04:05:13PM +0200, Christoph Hellwig wrote: > > > > On Tue, Jul 06, 2021 at 03:01:04PM +0100, Robin Murphy wrote: > > > > > FWIW I was pondering the question of whether to do something along those > > > > > lines or just scrap the default assignment entirely, so since I hadn't got > > > > > round to saying that I've gone ahead and hacked up the alternative > > > > > (similarly untested) for comparison :) > > > > > > > > > > TBH I'm still not sure which one I prefer... > > > > > > > > Claire did implement something like your suggestion originally, but > > > > I don't really like it as it doesn't scale for adding multiple global > > > > pools, e.g. for the 64-bit addressable one for the various encrypted > > > > secure guest schemes. > > > > > > Couple of things: > > > - I am not pushing to Linus the Claire's patchset until we have a > > > resolution on this. I hope you all agree that is a sensible way > > > forward as much as I hate doing that. > > > > Sure, it's a pity but we could clearly use a bit more time to get these > > just right and we've run out of time for 5.14. > > > > I think the main question I have is how would you like to see patches for > > 5.15? i.e. as patches on top of devel/for-linus-5.14 or something else? > > Yes that would be perfect. If there are any dependencies on the rc1, I > can rebase it on top of that. Yes, please, rebasing would be very helpful. The broader rework of 'io_tlb_default_mem' is going to conflict quite badly otherwise. Cheers, Will