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[2003:cb:c734:b800:12c4:65cd:348a:aee6]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38dd34f2af5sm7815443f8f.78.2025.02.10.10.41.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Feb 2025 10:41:28 -0800 (PST) Message-ID: Date: Mon, 10 Feb 2025 19:41:26 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 14/20] rmap: Add support for PUD sized mappings to rmap To: Alistair Popple , akpm@linux-foundation.org, dan.j.williams@intel.com, linux-mm@kvack.org Cc: Alison Schofield , lina@asahilina.net, zhang.lyra@gmail.com, gerald.schaefer@linux.ibm.com, vishal.l.verma@intel.com, dave.jiang@intel.com, logang@deltatee.com, bhelgaas@google.com, jack@suse.cz, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, willy@infradead.org, djwong@kernel.org, tytso@mit.edu, linmiaohe@huawei.com, peterx@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, david@fromorbit.com, chenhuacai@kernel.org, kernel@xen0n.name, loongarch@lists.linux.dev References: <1518b89f5659d2595bf9878da4a76221ffcfef60.1738709036.git-series.apopple@nvidia.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8BDB3180012 X-Stat-Signature: d14b5fanymyi7qzddn1yqkf5bh4fgosy X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1739212893-461594 X-HE-Meta: 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 /jBsfyH1 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 04.02.25 23:48, Alistair Popple wrote: > The rmap doesn't currently support adding a PUD mapping of a > folio. This patch adds support for entire PUD mappings of folios, > primarily to allow for more standard refcounting of device DAX > folios. Currently DAX is the only user of this and it doesn't require > support for partially mapped PUD-sized folios so we don't support for > that for now. > > Signed-off-by: Alistair Popple > Acked-by: David Hildenbrand > Reviewed-by: Dan Williams Nit: patch subject should start with "mm/rmap:" -- Cheers, David / dhildenb