From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CACB83E49FE; Fri, 16 Oct 2026 08:11:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792138301; cv=none; b=kycyRKi7KZUlcVpzLeoRAemt5HtO81AyoIaVoOyTNQXFVnPd5vsUjdRdtWS8xdTPtKQkjyyl77iDUXuogU1LVWVIhxi0V6gfgnqP/EpjJjFUfaD+pqEbR+1MlTXlMjmml6WgPxYQslWQ5qeSFpiAjBboTNd3qxFGNc6p+CxVqWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792138301; c=relaxed/simple; bh=fJ7CvucKno65olNhbcWL4ZDFKdJHu9ghSScEyiyfRC4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JRNF/Oe/c6mg6yvTm7vB2Ac/j1BcoE8V8LEcH0xYjAv8OxKIaUhIQPF9bFjiIk2ZmKnb8xXL87PFaT7ReERWNmPlQVYIUdHk/oNZwZl8q/Ylex5+z8GvB1+jfkEZdmvbvgqkZFyzorXf3QYkmZkBZOZuut9AEsIi4ogTlyYjFEc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y9Qc3KBd; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y9Qc3KBd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 886951F000C4; Fri, 16 Oct 2026 08:11:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792138300; bh=BBGAT7ue9VgHZMuu5dAb/6oFafAsXIvH9NDdySY61DU=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Y9Qc3KBdcZWgZjWsaAYnSgSER1uaz+BaIQ2eo8wOVW2XevFfSrviKphX0IpLqNOQU J3rNGys0fEfxFxyjD6NGhqth8kxZet5yd4j+UsdTVoDsSdZuH5UcQuNWzG+QRh8swv egdH5IAmn6eWndutGah39BCtH0vUezekNLRCZ/vEUFLRL0T+VyKxINBN8U8s7r7QoL 3wBKxEC7c6UUQPYd9jPvqWr8zcYJY9m+RumfPmgmejL/Q6Fnj+lTXXDJjsOwGOZJbn jdxy1IRC7v4xAjsIrHPzHSTtR+yWxvhHddNJlK4RSEzryGAgYkHiU9392IxR1qvkkX GGXM7I2+M3iDA== Date: Fri, 16 Oct 2026 09:11:30 +0100 From: "Lorenzo Stoakes (ARM)" To: Andrew Morton Cc: Nimrod Oren , David Hildenbrand , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Shuah Khan , Randy Dunlap , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Brendan Jackman , Johannes Weiner , David Laight , linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: stop recalculating min_free_kbytes once set by userspace Message-ID: References: <20261014140859.1006967-1-noren@nvidia.com> <20261014144823.8c89da26c547fa95936a2fe5@linux-foundation.org> <26103c38-7b22-4176-8bc3-63e4b8fc6bbb@nvidia.com> <20261015173826.e7ffb7333fb84f5be927ae88@linux-foundation.org> 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: <20261015173826.e7ffb7333fb84f5be927ae88@linux-foundation.org> On Thu, Oct 15, 2026 at 05:38:26PM -0700, Andrew Morton wrote: > Do you (and others) feel that we should backport this? Or is it just > not applicable to real-world users of older kernels? > > If we expect there to be non-zero users of 64k-page kernels on older > versions then I think "yes, our users will benefit from this". This is a functional change, so I don't think a backport is appropriate. We add useful stuff in newer kernel versions all the time :) users who wish to benefit from them need to update their kernels. -- Cheers, Lorenzo