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Tue, 29 Apr 2025 09:38:49 -0700 (PDT) Date: Tue, 29 Apr 2025 09:38:49 -0700 (PDT) From: "Christoph Lameter (Ampere)" To: Nico Pache cc: linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, akpm@linux-foundation.org, corbet@lwn.net, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, david@redhat.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, ryan.roberts@arm.com, willy@infradead.org, peterx@redhat.com, ziy@nvidia.com, wangkefeng.wang@huawei.com, usamaarif642@gmail.com, sunnanyong@huawei.com, vishal.moola@gmail.com, thomas.hellstrom@linux.intel.com, yang@os.amperecomputing.com, kirill.shutemov@linux.intel.com, aarcange@redhat.com, raquini@redhat.com, dev.jain@arm.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, tiwai@suse.de, will@kernel.org, dave.hansen@linux.intel.com, jack@suse.cz, jglisse@google.com, surenb@google.com, zokeefe@google.com, hannes@cmpxchg.org, rientjes@google.com, mhocko@suse.com, rdunlap@infradead.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com Subject: Re: [PATCH v5 12/12] Documentation: mm: update the admin guide for mTHP collapse In-Reply-To: <20250428181218.85925-13-npache@redhat.com> Message-ID: <6fd003dc-2a2d-ca15-e7b6-9af988fdbc3f@gentwo.org> References: <20250428181218.85925-1-npache@redhat.com> <20250428181218.85925-13-npache@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 044B4160002 X-Stat-Signature: atuwycwoh5htn8az7jfcfrmha8jqasy5 X-HE-Tag: 1745945455-384434 X-HE-Meta: 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 qPJ/xG7t Cvos8dHGS1Ks6RMtzhkeonU+txjUBz1JP0wBdzI2nMq+omAu1NRXTnn5Yna8kjl3XUqkJp0jFx5DokkEwIskQj4AgduCrckCWXSyAzc+6YfJq/7VPJvOHvetyKYLyDGxkwXI8VHkd7k5Xr/q36ftDmgWeuLKZi/VZ9wun5NsVaBOy/gO3CPVq8xZJjrQEjzI2w9pIDEFwX3jgDsOWmppp6OgoDQqnpIajoji2zWteFIZFAx5yTmbp5rGP2P97a4VkwjfV8SmXMDVSbXMB9PORnQgvFPUzAgsC4I6LClse6wurHeRkdGPtnkSepqTcKN4tALWwlfUSjsTyCgS5mRcq8wkU7A== 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 Mon, 28 Apr 2025, Nico Pache wrote: > THP can be enabled system wide or restricted to certain tasks or even > memory ranges inside task's address space. Unless THP is completely > disabled, there is ``khugepaged`` daemon that scans memory and > -collapses sequences of basic pages into PMD-sized huge pages. > +collapses sequences of basic pages into huge pages. huge pages usually have a fixed size like 2M and are tied to the page table levels. Would it not be advisable to use a different term here like "large folio" or "mTHP sized folio" or something like that?