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[v2,0/5] mm: cleanups for device-exclusive entries (hmm)

Message ID 20250226132257.2826043-1-david@redhat.com (mailing list archive)
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Series mm: cleanups for device-exclusive entries (hmm) | expand

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David Hildenbrand Feb. 26, 2025, 1:22 p.m. UTC 
Based on mm/mm-unstable, which already contains [1].

Some smaller device-exclusive cleanups I have lying around. Tested
using the hmm selftests without surprises.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>

v1 -> v2:
 * Rebased on top of [1]
 * "mm/memory: remove PageAnonExclusive sanity-check in
    restore_exclusive_pte()"
  -> Added
 * "mm/memory: document restore_exclusive_pte()"
  -> adjust/clarify/simplify documentation
 * "mm/mmu_notifier: use MMU_NOTIFY_CLEAR in
    remove_device_exclusive_entry()"
  -> Use MMU_NOTIFY_EXCLUSIVE only for a single purpose such that we
     always have the owner

[1] https://lkml.kernel.org/r/20250210193801.781278-1-david@redhat.com

David Hildenbrand (5):
  lib/test_hmm: make dmirror_atomic_map() consume a single page
  mm/memory: remove PageAnonExclusive sanity-check in
    restore_exclusive_pte()
  mm/memory: pass folio and pte to restore_exclusive_pte()
  mm/memory: document restore_exclusive_pte()
  mm/mmu_notifier: use MMU_NOTIFY_CLEAR in
    remove_device_exclusive_entry()

 include/linux/mmu_notifier.h |  8 ++---
 lib/test_hmm.c               | 32 ++++++-------------
 mm/memory.c                  | 60 ++++++++++++++++++++++++------------
 3 files changed, 55 insertions(+), 45 deletions(-)


base-commit: 598d34afeca6bb10554846cf157a3ded8729516c