v1: https://lore.kernel.org/linux-mm/20210529064022.GB15834@lst.de/T/
v2: This patch series version has merged "[RFC PATCH v3 0/2] mm: remove extra ZONE_DEVICE struct page refcount" patch series made by Ralph Campbell. It also applies at the top of these series, our changes to support device generic type in migration_vma helpers. This has been tested in systems with device memory that has coherent access by CPU.
Also addresses the following feedback made in v1: - Isolate in one patch kernel/resource.c modification, based on Christoph's feedback. - Add helpers check for generic and private type to avoid duplicated long lines.
I like to provide an overview of what each of the patches does in a series:
Patches 1-2: Rebased Ralph Campbell's ZONE_DEVICE page refcounting patches Patch 3: Export lookup_resource Patches 4-5: AMDGPU driver changes to register and use DEVICE_GENERIC memory Patches 6-8: Handle DEVICE_GENERIC memory in migration helpers
Alex Sierra (6): kernel: resource: lookup_resource as exported symbol drm/amdkfd: add SPM support for SVM drm/amdkfd: generic type as sys mem on migration to ram include/linux/mm.h: helpers to check zone device generic type mm: add generic type support to migrate_vma helpers mm: call pgmap->ops->page_free for DEVICE_GENERIC pages
Ralph Campbell (2): ext4/xfs: add page refcount helper mm: remove extra ZONE_DEVICE struct page refcount
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 15 ++++-- drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +- fs/dax.c | 8 +-- fs/ext4/inode.c | 5 +- fs/xfs/xfs_file.c | 4 +- include/linux/dax.h | 10 ++++ include/linux/memremap.h | 7 +-- include/linux/mm.h | 52 +++--------------- kernel/resource.c | 2 +- lib/test_hmm.c | 2 +- mm/internal.h | 8 +++ mm/memremap.c | 69 +++++++----------------- mm/migrate.c | 13 ++--- mm/page_alloc.c | 3 ++ mm/swap.c | 45 ++-------------- 16 files changed, 83 insertions(+), 164 deletions(-)