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Date:   Wed, 13 Feb 2019 15:04:48 -0800
From:   ira.weiny@...el.com
To:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, kvm@...r.kernel.org,
        linux-fpga@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-rdma@...r.kernel.org, linux-media@...r.kernel.org,
        linux-scsi@...r.kernel.org, devel@...verdev.osuosl.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-fbdev@...r.kernel.org, xen-devel@...ts.xenproject.org,
        devel@...ts.orangefs.org, linux-mm@...ck.org,
        ceph-devel@...r.kernel.org, rds-devel@....oracle.com
Cc:     Ira Weiny <ira.weiny@...el.com>,
        John Hubbard <jhubbard@...dia.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Joerg Roedel <joro@...tes.org>, Wu Hao <hao.wu@...el.com>,
        Alan Tull <atull@...nel.org>, Moritz Fischer <mdf@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Dennis Dalessandro <dennis.dalessandro@...el.com>,
        Christian Benvenuti <benve@...co.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matt Porter <mporter@...nel.crashing.org>,
        Alexandre Bounine <alex.bou9@...il.com>,
        Kai Mäkisara <Kai.Makisara@...umbus.fi>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Rob Springer <rspringer@...gle.com>,
        Todd Poynor <toddpoynor@...gle.com>,
        Ben Chan <benchan@...omium.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Martin Brandenburg <martin@...ibond.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH V2 0/7] Add FOLL_LONGTERM to GUP fast and use it

From: Ira Weiny <ira.weiny@...el.com>

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(-)

-- 
2.20.1

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