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

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Message-ID: <20250226132257.2826043-1-david@redhat.com>
Date: Wed, 26 Feb 2025 14:22:52 +0100
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jérôme Glisse <jglisse@...hat.com>,
	Simona Vetter <simona@...ll.ch>,
	Alistair Popple <apopple@...dia.com>,
	Jason Gunthorpe <jgg@...dia.com>
Subject: [PATCH v2 0/5] mm: cleanups for device-exclusive entries (hmm)

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@...ux-foundation.org>
Cc: "Jérôme Glisse" <jglisse@...hat.com>
Cc: Simona Vetter <simona@...ll.ch>
Cc: Alistair Popple <apopple@...dia.com>
Cc: Jason Gunthorpe <jgg@...dia.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
-- 
2.48.1