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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1093BC433EF for ; Mon, 7 Feb 2022 23:51:51 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8F6D06B0073; Mon, 7 Feb 2022 18:51:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8A70E6B0075; Mon, 7 Feb 2022 18:51:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 76E3F6B0078; Mon, 7 Feb 2022 18:51:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0134.hostedemail.com [216.40.44.134]) by kanga.kvack.org (Postfix) with ESMTP id 680996B0073 for ; Mon, 7 Feb 2022 18:51:50 -0500 (EST) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 2A64B181B3AC0 for ; Mon, 7 Feb 2022 23:51:50 +0000 (UTC) X-FDA: 79117633980.09.D018730 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) by imf17.hostedemail.com (Postfix) with ESMTP id 95FAA40005 for ; Mon, 7 Feb 2022 23:51:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:content-disposition; bh=m4ev1WCRNCl+02YqH74txp8M2CR/EORhvQhxQiDZxaA=; b=eqokiLHaXaeyt/5s6v5Dxq44/e IAqW59SoSHKudPP22PbYzdepcvKhqjbzyfkSuYw4KpL9xtVArn6pQK2Ldyz7E4YcAH9NSYynVTo0x bdiKjmtt+SN4YZG0Ew92tD4rJQNUm7KEjM7PROljaQAtDtxBiTL5EVi6VghTHYbECpve5DE5uUb1N duzW6PtphJmZZ+0mX3PJgZhC5/rVEq/3qykeOe3ABa53oImY5pgTVdlOQOq4oG9J4bsLodSeeYQi1 1+6C1yRgCfpdXKc5xhSACk3BweTjswDgZ4yDXBO7FMi9Z1A4zGwJMemyijSE1P8AHIhJmmSKYeRTc ECAC1LFQ==; Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1nHDnM-00EdA1-EY; Mon, 07 Feb 2022 16:51:45 -0700 To: Christoph Hellwig , Andrew Morton , Dan Williams Cc: Felix Kuehling , Alex Deucher , =?UTF-8?Q?Christian_K=c3=b6nig?= , "Pan, Xinhui" , Ben Skeggs , Karol Herbst , Lyude Paul , Jason Gunthorpe , Alistair Popple , Ralph Campbell , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, nvdimm@lists.linux.dev, linux-mm@kvack.org References: <20220207063249.1833066-1-hch@lst.de> From: Logan Gunthorpe Message-ID: <29a9f365-064a-f5db-0690-57bae007ce62@deltatee.com> Date: Mon, 7 Feb 2022 16:51:42 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20220207063249.1833066-1-hch@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: linux-mm@kvack.org, nvdimm@lists.linux.dev, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, rcampbell@nvidia.com, apopple@nvidia.com, jgg@ziepe.ca, lyude@redhat.com, kherbst@redhat.com, bskeggs@redhat.com, Xinhui.Pan@amd.com, christian.koenig@amd.com, alexander.deucher@amd.com, Felix.Kuehling@amd.com, dan.j.williams@intel.com, akpm@linux-foundation.org, hch@lst.de X-SA-Exim-Mail-From: logang@deltatee.com Subject: Re: start sorting out the ZONE_DEVICE refcount mess X-SA-Exim-Version: 4.2.1 (built Sat, 13 Feb 2021 17:57:42 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) X-Stat-Signature: 8s6auo75otan9kwy8hncysowhusggi3o Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=deltatee.com header.s=20200525 header.b=eqokiLHa; spf=pass (imf17.hostedemail.com: domain of logang@deltatee.com designates 204.191.154.188 as permitted sender) smtp.mailfrom=logang@deltatee.com; dmarc=pass (policy=none) header.from=deltatee.com X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 95FAA40005 X-HE-Tag: 1644277906-413176 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2022-02-06 11:32 p.m., Christoph Hellwig wrote: > Hi all, > > this series removes the offset by one refcount for ZONE_DEVICE pages > that are freed back to the driver owning them, which is just device > private ones for now, but also the planned device coherent pages > and the ehanced p2p ones pending. > > It does not address the fsdax pages yet, which will be attacked in a > follow on series. > > Diffstat: > arch/arm64/mm/mmu.c | 1 > arch/powerpc/kvm/book3s_hv_uvmem.c | 1 > drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 2 > drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 > drivers/gpu/drm/drm_cache.c | 2 > drivers/gpu/drm/nouveau/nouveau_dmem.c | 3 - > drivers/gpu/drm/nouveau/nouveau_svm.c | 1 > drivers/infiniband/core/rw.c | 1 > drivers/nvdimm/pmem.h | 1 > drivers/nvme/host/pci.c | 1 > drivers/nvme/target/io-cmd-bdev.c | 1 > fs/Kconfig | 2 > fs/fuse/virtio_fs.c | 1 > include/linux/hmm.h | 9 ---- > include/linux/memremap.h | 22 +++++++++- > include/linux/mm.h | 59 ++++------------------------- > lib/test_hmm.c | 4 + > mm/Kconfig | 4 - > mm/internal.h | 2 > mm/memcontrol.c | 11 +---- > mm/memremap.c | 63 ++++++++++++++++--------------- > mm/migrate.c | 6 -- > mm/swap.c | 49 ++---------------------- > 23 files changed, 90 insertions(+), 157 deletions(-) Looks good to me. I was wondering about the location of some of this code, so it's nice to see it cleaned up. Except for the one minor issue I noted on patch 6, it all looks good to me. I've reviewed all the patches and tested the series under my p2pdma series. Reviewed-by: Logan Gunthorpe Logan