From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f49.google.com (mail-qv1-f49.google.com [209.85.219.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F2472F8BCB for ; Mon, 20 Oct 2025 14:22:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760970173; cv=none; b=HKCZPqjdaEXl7d77X3DNkVPZX5A4Q9syH9YxQB9FCRzBwgqplS6NfqPnS4EMlkbeKvh8nqz9EYeUf1nEppYP+Ah2cMSTwHGVFsuTHDr+tK3B3KAYVSNJn2sVCZ3D0Uc0xfv9NaY5dR7hYEIWbTU4LRQgs2vGmcTvVLx+zjorVz8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760970173; c=relaxed/simple; bh=UJJpmzAqJ4fNKtxAFBD6r6VHXs+/qK3P1QsraWv63QE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=n2C5N+YwI/VTDyPgxrYQIJ0w1j9JuiyNn9NF24ayOL9/6Xb2jDUiWM6xFDZjjpV0nmmCdxWpajPX8oHBkILikSi3mfdid3Ft3pMA2iTC11VYubOt2gqNeeNzZfVL/VWnAffGXZfNfRCaJHfZOAxq/8Uf1PTO8+DhnzLGtkEB3Po= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net; spf=pass smtp.mailfrom=gourry.net; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b=B3vxHAJY; arc=none smtp.client-ip=209.85.219.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gourry.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b="B3vxHAJY" Received: by mail-qv1-f49.google.com with SMTP id 6a1803df08f44-78ed682e9d3so60773946d6.0 for ; Mon, 20 Oct 2025 07:22:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1760970170; x=1761574970; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=Ome1K21U8OKmqIh6cxr7UpkIOBQ/Su9V9X20JROSYuM=; b=B3vxHAJYKEs/96pn/HUMQIY5sOQM7Yc6roOi8anQ8ev3wQP2b4sgumnLtf0Juo/0lQ mbArhcdwH8v6YcDL3hMyxusAbKZ26ugm49gWNj4jnAQ7lRJDVvGW45BgKkKvPfPLIp+u ua5B8DZ+n5dhlEbkom8vBytat3QmYCEGOJ/IvfnwoNuyyMTtzRmn46lppLfsINEOF7or ZAUKxiIIpu8mXNr9thhW2JFaNg4cFpkolrxJbPwa004sXQNbv641mSyiG4avZ45SYU27 +KIE8YHK5t93F0ZZ/I8Ca4zviqMI1m8f/UARfvLWkaYUGF67cKfj55BOpwYkc+pXBYFc Kikg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760970170; x=1761574970; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Ome1K21U8OKmqIh6cxr7UpkIOBQ/Su9V9X20JROSYuM=; b=ntuhS4+/KcW9z93NK8Ki/Aqm7/zHGLhLSr4MwQ4NMvwWWy5AwO45Enff4WMl/y3F3E GLHSGKMi+pCxJCBKkvYWMoIJUwcbjJKVEn5m3RYYw65OBqep4pWQIZPQB55vz4rOUDjw NB9geTEgx10XxrL3EKlryUagUsvGxZgtfEl6nXuV7/23YwMFC7j31B0j0DDzGeyFOeFv SZNJqFIsTCr4K+2ZIGUGUaxAj8cStSavW7bwSOC+KtQffM/bRwDPkIdYOWpxzMOzNKE2 0qSGrDjdEVY0LLFtzk2xHLdbpG+ZxbpspjKjKI4zDqpWcA4+EC3fbgmm0HZyuGcHruEs QF6A== X-Forwarded-Encrypted: i=1; AJvYcCV+DugaZFl0g8ZzWL5bfbnREgxnq/HhzlUK6lWWFyCaAZ90zYd6x7Ld+pjWUb/cYR+J4rSMsB5dZgJeHgM=@vger.kernel.org X-Gm-Message-State: AOJu0YwOrCRI30CDR64XG5h5Yqo+pNTF8/0vOj1wWnFlUPqvJAAwBiU5 p9u6qTUZg5V9XTDTXfTQkD88yHsMHfh3/dxQCD7sAoznXyOG56daFiiSZoX9MUr1kmA= X-Gm-Gg: ASbGncurfPlvX/FxMtBpC4zTnQBhWbkTVUoVsSD0toyGbWNNShv0QfBE6xwMS4nkCUx MXtSAgSqtYgW+OAj/EmM88+m1VfOElta8rsfhzpcb5r8QZJjXii2ecLp9JlHgLkZh8QPE0cYwUY j4r3HEl4k9ATG/6Jc31J9o/UlRQFteEcn1Vq4R7HEDg4l++NwXXGsLqSYqeYe0Vuf5gk51X0/jH qB+xTklVJD1+98SQLd8OYH0cS2an0w4neXQnxWHLKI8z3wU0n8lawk9i33Iq5bt+oFxrAHfk89W QHCiuQMccVGrNmk6yxfZTP9PxLC1YC0/dbLDOAwdhcNsQeukAMVCp25RkpZSb+Ixilw5j+iXa7P iCSjD2/1BjJZJ78WLUEXwEx1AAd1ocubYZ1lfrRvt6GyvtvJGLb/NkOn/NZEOk5Xmf6TC+nmqqn 26w8mlNarqmVpRGpJur/UGDmSPMgnaFWqxNekcoXzAspdWpW01jAvP7bQ2ocLyr4LQwYYQPw== X-Google-Smtp-Source: AGHT+IGL/jp9+4xUfY50jcRRy/t4MGHpw6jQ2O094KKD/LfcVRUdB+PlhBahj0B9OuP95IOnQE5uVw== X-Received: by 2002:a05:622a:306:b0:4e8:a85f:e4a6 with SMTP id d75a77b69052e-4e8b7cdf3cbmr81951421cf.81.1760970170265; Mon, 20 Oct 2025 07:22:50 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F (pool-96-255-20-138.washdc.ftas.verizon.net. [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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6fe3562d-49b2-4975-aa86-e139c535ad00@redhat.com> 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