From patchwork Wed Feb 20 05:30:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 10821201 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 45084184E for ; Wed, 20 Feb 2019 05:30:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 306032DBF6 for ; Wed, 20 Feb 2019 05:30:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 240242DC11; Wed, 20 Feb 2019 05:30:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B4FB12DC03 for ; Wed, 20 Feb 2019 05:30:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727627AbfBTFaw (ORCPT ); Wed, 20 Feb 2019 00:30:52 -0500 Received: from mga06.intel.com ([134.134.136.31]:25315 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726082AbfBTFav (ORCPT ); Wed, 20 Feb 2019 00:30:51 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Feb 2019 21:30:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,388,1544515200"; d="scan'208";a="144924899" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by fmsmga002.fm.intel.com with ESMTP; 19 Feb 2019 21:30:48 -0800 From: ira.weiny@intel.com To: John Hubbard , Andrew Morton , 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 , Paul Burton , James Hogan Cc: Ira Weiny , linux-kernel@vger.kernel.org, linux-mm@kvack.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, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linux-fpga@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-scsi@vger.kernel.org, devel@driverdev.osuosl.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-fbdev@vger.kernel.org, xen-devel@lists.xenproject.org, devel@lists.orangefs.org, ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com Subject: [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it Date: Tue, 19 Feb 2019 21:30:33 -0800 Message-Id: <20190220053040.10831-1-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ira Weiny Resending these as I had only 1 minor comment which I believe we have covered in this series. I was anticipating these going through the mm tree as they depend on a cleanup patch there and the IB changes are very minor. But they could just as well go through the IB tree. NOTE: This series depends on my clean up patch to remove the write parameter from gup_fast_permitted()[1] 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 of 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.[2] 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/2019/2/11/237 [2] 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 | 4 +- 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/orangefs/orangefs-bufmap.c | 2 +- include/linux/mm.h | 17 +- kernel/futex.c | 2 +- lib/iov_iter.c | 7 +- mm/gup.c | 220 ++++++++++++-------- mm/gup_benchmark.c | 5 +- mm/util.c | 8 +- net/ceph/pagevec.c | 2 +- net/rds/info.c | 2 +- net/rds/rdma.c | 3 +- 44 files changed, 232 insertions(+), 180 deletions(-)