These patches apply to linux-5.8.0-rc1. Patches 1-3 should probably go into 5.8, the others can be queued for 5.9. Patches 4-6 improve the HMM self tests. Patch 7-8 prepare nouveau for the meat of this series which adds support and testing for compound page mapping of system memory (patches 9-11) and compound page migration to device private memory (patches 12-16). Since these changes are split across mm core, nouveau, and testing, I'm guessing Jason Gunthorpe's HMM tree would be appropriate.
Ralph Campbell (16): mm: fix migrate_vma_setup() src_owner and normal pages nouveau: fix migrate page regression nouveau: fix mixed normal and device private page migration mm/hmm: fix test timeout on slower machines mm/hmm/test: remove redundant page table invalidate mm/hmm: test mixed normal and device private migrations nouveau: make nvkm_vmm_ctor() and nvkm_mmu_ptp_get() static nouveau/hmm: fault one page at a time mm/hmm: add output flag for compound page mapping nouveau/hmm: support mapping large sysmem pages hmm: add tests for HMM_PFN_COMPOUND flag mm/hmm: optimize migrate_vma_setup() for holes mm: support THP migration to device private memory mm/thp: add THP allocation helper mm/hmm/test: add self tests for THP migration nouveau: support THP migration to private memory
drivers/gpu/drm/nouveau/nouveau_dmem.c | 177 +++++--- drivers/gpu/drm/nouveau/nouveau_svm.c | 241 +++++------ drivers/gpu/drm/nouveau/nouveau_svm.h | 3 +- .../gpu/drm/nouveau/nvkm/subdev/mmu/base.c | 6 +- .../gpu/drm/nouveau/nvkm/subdev/mmu/priv.h | 2 + drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c | 10 +- drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h | 3 - .../drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 29 +- include/linux/gfp.h | 10 + include/linux/hmm.h | 4 +- include/linux/migrate.h | 1 + include/linux/mm.h | 1 + lib/test_hmm.c | 359 ++++++++++++---- lib/test_hmm_uapi.h | 2 + mm/hmm.c | 10 +- mm/huge_memory.c | 46 ++- mm/internal.h | 1 - mm/memory.c | 10 +- mm/memremap.c | 9 +- mm/migrate.c | 236 +++++++++-- mm/page_alloc.c | 1 + tools/testing/selftests/vm/hmm-tests.c | 388 +++++++++++++++++- 22 files changed, 1203 insertions(+), 346 deletions(-)