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t=1785404776; bh=mS7cuEvlNnDOfcNrpI4hgJf5yyKkfr7S7sj+PeCdL8E=; h=From:To:Cc:Subject:Date:From; b=acdJATU9k4ZO0FvIY+fx5KSgvSkq2wgbCdjbKzc9+a+WaU9uOpGE1wOQuChZU4v6d LnxVbO0B5mjmPtKIekX2mi0Fr77TUZZZjEcDPhwJiqfiFF3NYUMJstf5XgaIp0r6fP PsA5+O4SkNIIEiSYdVAR8QZ2yQGLUUtwbF7R8cpk= From: Dev Jain To: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, muchun.song@linux.dev, osalvador@suse.de Cc: Dev Jain , riel@surriel.com, liam@infradead.org, vbabka@kernel.org, harry@kernel.org, jannh@google.com, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, ryan.roberts@arm.com, anshuman.khandual@arm.com Subject: [PATCH v4 0/5] mm/rmap: Refactor try_to_unmap_one Date: Thu, 30 Jul 2026 09:45:51 +0000 Message-ID: <20260730094559.418003-1-dev.jain@arm.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 1702540009 X-Rspamd-Server: rspam01 X-Stat-Signature: pn1sjnbr413andgkjohqwtwnjxcizzto X-HE-Tag: 1785404777-786778 X-HE-Meta: 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 1NGIHjFV n7l/pXkh65Nz/wUMEFsif22C3lBvpMxPgM2TQ5PAuPAWJfkqu3meuklaDPYAs5RE05dR4qmo9qJEGWSTw7vWsUFSrzA3kEBSY3X0g20I64/UOOX97NFQJkG/cB0iyhHFhnieciut8jTv6Axf7KtSwmYhZbPgDjVPgEza5BDqJhJzvTbAGjSD+GvrLkKqcXpp+b/YLu3e0NvNIzIyxkO1W1eqfKxjJDnUWGS+4PaTYKpsFUEOoIokLYlk8ZnnnyHdqaHZhgXYhc4SXqN4ZPv9LLUEsq89FNrss9AFJIGIZKtvxx+njbzcBUoWQ+GcBWM+vcBeR Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: In preparation for batching anonymous large folio unmapping to optimize it, refactor try_to_unmap_one. This series refactors hugetlb, anon-lazyfree and anon-swapbacked logic into their own functions, significantly reducing the length of the huge try_to_unmap_one. --- Based on mm-unstable (d8c677ce1220b0db119ada6c6f9762c07c4d8aca). Split out from https://lore.kernel.org/all/20260526063635.61721-1-dev.jain@arm.com/ mm-selftests pass on arm64, built on arm64 and x86. v3->v4: - Tighten comment around TTU_HWPOISON - try_to_unmap_hugetlb_one -> try_to_unmap_poisoned_hugetlb_one - VM_WARN_ON -> VM_WARN_ON_ONCE v2->v3: - Patch 2: fix comment to say that TTU_HWPOISON can be true for small folios only in try_to_unmap_one, since hugetlb bits are now refactored away - Patch 5: Directly do if (WARN_ON_ONCE()) - Rebase on latest mm-unstable to resolve conflicts with 30c83145c5b3 ("mm: rename uffd-wp PTE accessors to uffd") v1->v2: - constify ttu flags in try_to_unmap_hugetlb_one, move const variables up - Assert address passed to try_to_unmap_hugetlb_one equals pvmw.address - Patch 3: code and comment polishing, do the stat update in the function - Remove unnecessary inline hints, remove set_swp_pte_at, instead have swp_pte_prepare + set_ptes. Rename subpage -> page. constify anon_exclusive. - Do pte restoration in caller Dev Jain (5): mm/rmap: convert page -> folio for hwpoison checks mm/rmap: Add try_to_unmap_poisoned_hugetlb_one mm/rmap: refactor some code around lazyfree folio unmapping mm/rmap: refactor anon folio unmap in try_to_unmap_one mm/rmap: add anon folio unmap dispatcher include/linux/hugetlb.h | 1 + mm/rmap.c | 415 ++++++++++++++++++++++------------------ 2 files changed, 232 insertions(+), 184 deletions(-) -- 2.43.0