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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS autolearn=ham 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 CBC40C43381 for ; Mon, 25 Mar 2019 14:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A4E1420879 for ; Mon, 25 Mar 2019 14:40:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729264AbfCYOkP (ORCPT ); Mon, 25 Mar 2019 10:40:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57222 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726143AbfCYOkO (ORCPT ); Mon, 25 Mar 2019 10:40:14 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 72A4530832C5; Mon, 25 Mar 2019 14:40:14 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.20.6.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id 701451001DC8; Mon, 25 Mar 2019 14:40:13 +0000 (UTC) From: jglisse@redhat.com To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Balbir Singh , Ralph Campbell , Andrew Morton , John Hubbard , Dan Williams Subject: [PATCH v2 00/11] Improve HMM driver API v2 Date: Mon, 25 Mar 2019 10:40:00 -0400 Message-Id: <20190325144011.10560-1-jglisse@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Mon, 25 Mar 2019 14:40:14 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jérôme Glisse This patchset improves the HMM driver API and add support for mirroring virtual address that are mmap of hugetlbfs or of a file in a filesystem on a DAX block device. You can find a tree with all the patches [1] This patchset is necessary for converting ODP to HMM and patch to do so as been posted [2]. All new functions introduced by this patchset are use by the ODP patch. The ODP patch will be push through the RDMA tree the release after this patchset is merged. Moreover all HMM functions are use by the nouveau driver starting in 5.1. The last patch in the serie add helpers to directly dma map/unmap pages for virtual addresses that are mirrored on behalf of device driver. This has been extracted from ODP code as it is is a common pattern accross HMM device driver. It will be first use by the ODP RDMA code and will latter get use by nouveau and other driver that are working on including HMM support. [1] https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-for-5.1-v2 [2] https://cgit.freedesktop.org/~glisse/linux/log/?h=odp-hmm [3] https://lkml.org/lkml/2019/1/29/1008 Cc: Balbir Singh Cc: Ralph Campbell Cc: Andrew Morton Cc: John Hubbard Cc: Dan Williams Jérôme Glisse (11): mm/hmm: select mmu notifier when selecting HMM mm/hmm: use reference counting for HMM struct v2 mm/hmm: do not erase snapshot when a range is invalidated mm/hmm: improve and rename hmm_vma_get_pfns() to hmm_range_snapshot() v2 mm/hmm: improve and rename hmm_vma_fault() to hmm_range_fault() v2 mm/hmm: improve driver API to work and wait over a range v2 mm/hmm: add default fault flags to avoid the need to pre-fill pfns arrays. mm/hmm: mirror hugetlbfs (snapshoting, faulting and DMA mapping) v2 mm/hmm: allow to mirror vma of a file on a DAX backed filesystem v2 mm/hmm: add helpers for driver to safely take the mmap_sem v2 mm/hmm: add an helper function that fault pages and map them to a device v2 Documentation/vm/hmm.rst | 36 +- include/linux/hmm.h | 290 ++++++++++- mm/Kconfig | 1 + mm/hmm.c | 1046 +++++++++++++++++++++++++------------- 4 files changed, 990 insertions(+), 383 deletions(-) -- 2.17.2