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(c-67-164-59-41.hsd1.ca.comcast.net. [67.164.59.41]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-749b5e23879sm4944869b3a.57.2025.06.25.10.49.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Jun 2025 10:49:30 -0700 (PDT) From: "Vishal Moola (Oracle)" To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, "Matthew Wilcox (Oracle)" , David Hildenbrand , Jordan Rome , Andrew Morton , "Vishal Moola (Oracle)" Subject: [RFC PATCH 0/3] Some remote_vm folio conversions Date: Wed, 25 Jun 2025 10:48:38 -0700 Message-ID: <20250625174841.1094510-1-vishal.moola@gmail.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Both callers of unmap_and_put_page() are for tracing purposes and interact with user vmas. In a memdesc world, these should end up operating on folios, so convert them. This patchset converts those functions so that gup - namely get_user_page_vma_remote() - can eventually safely pass around large folios. This iteration does NOT allow support for handling a large folio all at once, it merely makes working on subpages of a large folio safe. Does anyone have any thoughts on if we might want to handle these in larger than PAGE_SIZE chunks? It seems like a lot of work with how kmap() works right now... On a similar note, might we want to convert implementations of copy_{to,from}_user_page() to pass around folios as well? Vishal Moola (Oracle) (3): mm/memory.c: convert __copy_remote_vm_str() to folios mm/memory.c: convert __access_remote_vm() to folios mm: Remove unmap_and_put_page() include/linux/highmem.h | 6 ----- mm/memory.c | 52 +++++++++++++++++++++++++---------------- 2 files changed, 32 insertions(+), 26 deletions(-) -- 2.49.0