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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id af79cd13be357-891cf0af579sm568871285a.41.2025.10.20.07.22.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Oct 2025 07:22:49 -0700 (PDT) Date: Mon, 20 Oct 2025 10:22:47 -0400 From: Gregory Price To: David Hildenbrand Cc: linux-mm@kvack.org, osalvador@suse.de, corbet@lwn.net, muchun.song@linux.dev, akpm@linux-foundation.org, hannes@cmpxchg.org, laoar.shao@gmail.com, mclapinski@google.com, joel.granados@kernel.org, jack@suse.cz, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Mel Gorman , Michal Hocko , Alexandru Moise <00moses.alexander00@gmail.com>, David Rientjes Subject: Re: [RFC PATCH] mm, hugetlb: implement movable_gigantic_pages sysctl Message-ID: References: <20251009161515.422292-1-gourry@gourry.net> <6fe3562d-49b2-4975-aa86-e139c535ad00@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6fe3562d-49b2-4975-aa86-e139c535ad00@redhat.com> X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 39CB940008 X-Stat-Signature: hh67x3j3u19p5firci9a3zkce4sthhm7 X-Rspam-User: X-HE-Tag: 1760970171-883174 X-HE-Meta: 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 aRuDAfgV 94l1b/w//r/IUM1f6Le1BH5UH/9XNXvDmq98JkfhfUPSnkRejGoCehCwS/LqR7N1QaSDJA0DnJvt/3OY6niBUFX0eXi1+5LbR7Cb3mktqLbWkM2bXhF+1Y/zEUAPHez7Cp6YB3klv272WeQtviKCEtGLN3RY92NKUEimGCMcPpNl86/Ei7UoiJS0QuE7c1PvY2RUNlg3kR3Ivb45YBbtNTl3dSIpFz6+aLmXuJBvKXq30VSIf9DjvX7o4BxEHwGU6mEq5tEoj0iIkI3glSKTBATsnoQeozp/DVq+dFMM7fUA030H/SISQGZ9svheThLyzsQwDNhqHULMGpVdCcCexmrCcPZARwp6BvwFi7BYKd32vKxGeO+z3Mwkh2cb5iLRMWxfahmJ3VVH9N2weOWwIOqKZGuTrrBXnyHbjZA3O1feDQ1hhd3VwUfh7vUs6tXG3Yefz 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, Oct 20, 2025 at 04:17:06PM +0200, David Hildenbrand wrote: > On 09.10.25 18:15, Gregory Price wrote: > > However, it also means that we won't try moving 2MB folios to free up a 1GB > folio. > This may actually explain some other behavior we've been seeing, re: reliability of 1GB allocations. Let me ask some folks to look at this. Thanks David, ~Gregory