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Message-Id: <20190213230455.5605-1-ira.weiny@intel.com> 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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