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Fri, 24 Oct 2025 20:27:41 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id hwbIDT3h+2hOGAAAD6G6ig (envelope-from ); Fri, 24 Oct 2025 20:27:41 +0000 Date: Fri, 24 Oct 2025 21:27:39 +0100 From: Pedro Falcato To: Dmitry Ilvokhin Cc: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Hugh Dickins , Baolin Wang , Kiryl Shutsemau , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH] mm: shmem/tmpfs hugepage defaults config choice Message-ID: <5dt6roxyx3h4zojls7cvr4nyjtahi33ti2sir2ijr3w4wjliyz@fl32rra6phll> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Stat-Signature: 34yqfarxnhbaamjnake3fzzeyr4dkjtx X-Rspamd-Queue-Id: E2C88100013 X-Rspamd-Server: rspam09 X-HE-Tag: 1761337663-70274 X-HE-Meta: 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 9rC/9FCw YFGvuMOS/p/3qX0eagssX5+8u3Y0vgKI2I1ZpND573Pbn3elgQ8lzxEZHifCFyjVO4tZsPDPsHRGBX964psyRWfYNTI9JRI1ZgGejZBBpJfPcHAfO+La7foCiFXeL4cIwj+UU29ch8cJ+HrmxSVmu6pfTHtFtfubLXoIa/k4HNbZmoE7xdZhtce9tr/pKmCuF5gVbMFu417jHYYZmDmgI46Qu/gQaCL2Q4+8iSsZyecXXoW5iUgx5nG25tbelZ5OcA/VwisZnHbue5yaGkybAjN9sL8F/kIv0P2aDy6O179FmmcQ= 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 Thu, Oct 23, 2025 at 06:12:02PM +0000, Dmitry Ilvokhin wrote: > Allow to override defaults for shemem and tmpfs at config time. This is > consistent with how transparent hugepages can be configured. > > Same results can be achieved with the existing > 'transparent_hugepage_shmem' and 'transparent_hugepage_tmpfs' settings > in the kernel command line, but it is more convenient to define basic > settings at config time instead of changing kernel command line later. Why do you need these options instead of using CONFIG_CMDLINE? They should pull off exactly what you want, but without changing the kernel? -- Pedro