Re: start sorting out the ZONE_DEVICE refcount mess v2

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On Thursday, 10 February 2022 6:28:01 PM AEDT Christoph Hellwig wrote:

[...]

> Changes since v1:
>  - add a missing memremap.h include in memcontrol.c
>  - include rebased versions of the device coherent support and
>    device coherent migration support series as well as additional
>    cleanup patches

Thanks for the rebase. I will take a closer look at it tomorrow but I just
ran the hmm-tests and they are all still passing for me with this series.

> Diffstt:
>  arch/arm64/mm/mmu.c                      |    1 
>  arch/powerpc/kvm/book3s_hv_uvmem.c       |    1 
>  drivers/gpu/drm/amd/amdkfd/kfd_migrate.c |   35 -
>  drivers/gpu/drm/amd/amdkfd/kfd_priv.h    |    1 
>  drivers/gpu/drm/drm_cache.c              |    2 
>  drivers/gpu/drm/nouveau/nouveau_dmem.c   |    3 
>  drivers/gpu/drm/nouveau/nouveau_svm.c    |    1 
>  drivers/infiniband/core/rw.c             |    1 
>  drivers/nvdimm/pmem.h                    |    1 
>  drivers/nvme/host/pci.c                  |    1 
>  drivers/nvme/target/io-cmd-bdev.c        |    1 
>  fs/Kconfig                               |    2 
>  fs/fuse/virtio_fs.c                      |    1 
>  include/linux/hmm.h                      |    9 
>  include/linux/memremap.h                 |   36 +
>  include/linux/migrate.h                  |    1 
>  include/linux/mm.h                       |   59 --
>  lib/test_hmm.c                           |  353 ++++++++++---
>  lib/test_hmm_uapi.h                      |   22 
>  mm/Kconfig                               |    7 
>  mm/Makefile                              |    1 
>  mm/gup.c                                 |  127 +++-
>  mm/internal.h                            |    3 
>  mm/memcontrol.c                          |   19 
>  mm/memory-failure.c                      |    8 
>  mm/memremap.c                            |   75 +-
>  mm/migrate.c                             |  763 ----------------------------
>  mm/migrate_device.c                      |  822 +++++++++++++++++++++++++++++++
>  mm/rmap.c                                |    5 
>  mm/swap.c                                |   49 -
>  tools/testing/selftests/vm/Makefile      |    2 
>  tools/testing/selftests/vm/hmm-tests.c   |  204 ++++++-
>  tools/testing/selftests/vm/test_hmm.sh   |   24 
>  33 files changed, 1552 insertions(+), 1088 deletions(-)
> 








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