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Subject[PATCH 0/5] get_user_pages_locked|unlocked v1
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This patchset standalone is an optimization leveraging the page fault
FAULT_FLAG_ALLOW_RETRY flag which allows the page fault paths to drop
the mmap_sem before I/O.

For the userfaultfd patchset this patch is instead a dependency as we
need that flag always set the first time any thread attempts a page
fault, in order to release the mmap_sem before stopping the page fault
(while waiting for a later userland wakeup).

http://thread.gmane.org/gmane.linux.kernel.mm/123575

Andrea Arcangeli (5):
mm: gup: add get_user_pages_locked and get_user_pages_unlocked
mm: gup: add __get_user_pages_unlocked to customize gup_flags
mm: gup: use get_user_pages_unlocked within get_user_pages_fast
mm: gup: use get_user_pages_unlocked
mm: gup: kvm use get_user_pages_unlocked

arch/mips/mm/gup.c | 8 +-
arch/powerpc/mm/gup.c | 6 +-
arch/s390/mm/gup.c | 6 +-
arch/sh/mm/gup.c | 6 +-
arch/sparc/mm/gup.c | 6 +-
arch/x86/mm/gup.c | 7 +-
drivers/iommu/amd_iommu_v2.c | 6 +-
drivers/media/pci/ivtv/ivtv-udma.c | 6 +-
drivers/scsi/st.c | 7 +-
drivers/video/fbdev/pvr2fb.c | 6 +-
include/linux/kvm_host.h | 11 --
include/linux/mm.h | 11 ++
mm/gup.c | 203 ++++++++++++++++++++++++++++++++++---
mm/nommu.c | 33 ++++++
mm/process_vm_access.c | 7 +-
mm/util.c | 10 +-
net/ceph/pagevec.c | 6 +-
virt/kvm/async_pf.c | 2 +-
virt/kvm/kvm_main.c | 50 +--------
19 files changed, 265 insertions(+), 132 deletions(-)


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