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=-1.9 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 2DF2CC43381 for ; Mon, 18 Mar 2019 02:36:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06C0E21734 for ; Mon, 18 Mar 2019 02:36:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727566AbfCRCgE (ORCPT ); Sun, 17 Mar 2019 22:36:04 -0400 Received: from mga12.intel.com ([192.55.52.136]:39306 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726972AbfCRCgE (ORCPT ); Sun, 17 Mar 2019 22:36:04 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Mar 2019 19:36:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,491,1544515200"; d="scan'208";a="155877408" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by fmsmga001.fm.intel.com with ESMTP; 17 Mar 2019 19:36:03 -0700 From: ira.weiny@intel.com To: Andrew Morton , John Hubbard , Michal Hocko , "Kirill A. Shutemov" , Peter Zijlstra , Jason Gunthorpe , Benjamin Herrenschmidt , Paul Mackerras , "David S. Miller" , Martin Schwidefsky , Heiko Carstens , Rich Felker , Yoshinori Sato , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Ralf Baechle , James Hogan Cc: Ira Weiny , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org Subject: [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it Date: Sun, 17 Mar 2019 11:34:31 -0700 Message-Id: <20190317183438.2057-1-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: Ira Weiny Resending after rebasing to the latest mm tree. HFI1, qib, and mthca, use get_user_pages_fast() due to it performance advantages. These pages can be held for a significant time. But get_user_pages_fast() does not protect against mapping FS DAX pages. Introduce FOLL_LONGTERM and use this flag in get_user_pages_fast() which retains the performance while also adding the FS DAX checks. XDP has also shown interest in using this functionality.[1] In addition we change get_user_pages() to use the new FOLL_LONGTERM flag and remove the specialized get_user_pages_longterm call. [1] https://lkml.org/lkml/2019/2/11/1789 Ira Weiny (7): mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM mm/gup: Change write parameter to flags in fast walk mm/gup: Change GUP fast to use flags rather than a write 'bool' mm/gup: Add FOLL_LONGTERM capability to GUP fast IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast() IB/qib: Use the new FOLL_LONGTERM flag to get_user_pages_fast() IB/mthca: Use the new FOLL_LONGTERM flag to get_user_pages_fast() arch/mips/mm/gup.c | 11 +- arch/powerpc/kvm/book3s_64_mmu_hv.c | 4 +- arch/powerpc/kvm/e500_mmu.c | 2 +- arch/powerpc/mm/mmu_context_iommu.c | 3 +- arch/s390/kvm/interrupt.c | 2 +- arch/s390/mm/gup.c | 12 +- arch/sh/mm/gup.c | 11 +- arch/sparc/mm/gup.c | 9 +- arch/x86/kvm/paging_tmpl.h | 2 +- arch/x86/kvm/svm.c | 2 +- drivers/fpga/dfl-afu-dma-region.c | 2 +- drivers/gpu/drm/via/via_dmablit.c | 3 +- drivers/infiniband/core/umem.c | 5 +- drivers/infiniband/hw/hfi1/user_pages.c | 5 +- drivers/infiniband/hw/mthca/mthca_memfree.c | 3 +- drivers/infiniband/hw/qib/qib_user_pages.c | 8 +- drivers/infiniband/hw/qib/qib_user_sdma.c | 2 +- drivers/infiniband/hw/usnic/usnic_uiom.c | 9 +- drivers/media/v4l2-core/videobuf-dma-sg.c | 6 +- drivers/misc/genwqe/card_utils.c | 2 +- drivers/misc/vmw_vmci/vmci_host.c | 2 +- drivers/misc/vmw_vmci/vmci_queue_pair.c | 6 +- drivers/platform/goldfish/goldfish_pipe.c | 3 +- drivers/rapidio/devices/rio_mport_cdev.c | 4 +- drivers/sbus/char/oradax.c | 2 +- drivers/scsi/st.c | 3 +- drivers/staging/gasket/gasket_page_table.c | 4 +- drivers/tee/tee_shm.c | 2 +- drivers/vfio/vfio_iommu_spapr_tce.c | 3 +- drivers/vfio/vfio_iommu_type1.c | 3 +- drivers/vhost/vhost.c | 2 +- drivers/video/fbdev/pvr2fb.c | 2 +- drivers/virt/fsl_hypervisor.c | 2 +- drivers/xen/gntdev.c | 2 +- fs/io_uring.c | 5 +- fs/orangefs/orangefs-bufmap.c | 2 +- include/linux/mm.h | 18 +- kernel/futex.c | 2 +- lib/iov_iter.c | 7 +- mm/gup.c | 258 ++++++++++++-------- mm/gup_benchmark.c | 5 +- mm/util.c | 8 +- net/ceph/pagevec.c | 2 +- net/rds/info.c | 2 +- net/rds/rdma.c | 3 +- net/xdp/xdp_umem.c | 4 +- 46 files changed, 262 insertions(+), 197 deletions(-) -- 2.20.1