From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6DF3723A99E for ; Sat, 15 Nov 2025 09:42:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763199729; cv=none; b=ZA82kzqbXbpThezmkeCjLfJBouqFSZX8ElhzsWdNG8vb8iQgQs00j4Q8Gm3ZWD3e6dIpGrWBVGSERQ1UsYbWypwfZqGWID1SFZAu4z8antvGIZG8Ff/w8VsJHN2K7XysI4RgX2x2hXyB0ygUvwpJyvyc8jT8gEhI3iFGdKHVcvQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763199729; c=relaxed/simple; bh=5TLcwJDDFiBtj7lJVJ9lPhvDhUna9We8VbF9X0zLOfI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WxzeUWx7whqpiotGvrs0viwtv+rVfQgs6xankKjLmU4eQtBcrmaZ60DaQrmrtNoFS8hnrYIwTQl/1V70e2mbPknsxkk5JYuPnKa0l6MRrjyzDzSuf4W0VDLCsyFwJQmvYSbQ6gkiEVa6153jO8qCqUS9SChZukgIen+Ay4gpe4U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JVE7FFfc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JVE7FFfc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D638C113D0; Sat, 15 Nov 2025 09:42:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763199727; bh=5TLcwJDDFiBtj7lJVJ9lPhvDhUna9We8VbF9X0zLOfI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=JVE7FFfcnStH8/zqhoWCvqwopCxelotqfG4sYk/BiaxyZy1UEJbCr94sYXbNJHav4 Y3x4oN5eUZmh/GhUDL2b28zkgS2SIu05fnQ6STStSprGS+E1o2ohQ4DaRgT9bZ1eg2 oV2Fh+N/VH2TdbPJcobloEaC3F6G4cMn1Feev7xyebN+UmwsMLWWj/Up8lenQsdTFn twFkMiK5B9gfWBoXnKKn8hQcW0k4WwcoqJZV14JAxtpvPKCQKm9iMdmwObnqo5HSV0 991oTRVul8vfpew05xw2F3A5UQbwRWcUrl4F4alp0931iG8fkbF5OnAuro2wJNSzIB Q9J0OECjcwi+g== Date: Sat, 15 Nov 2025 11:42:01 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: akpm@linux-foundation.org, graf@amazon.com, pratyush@kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH] liveupdate: kho: Enable KHO by default Message-ID: References: <20251110180715.602807-1-pasha.tatashin@soleen.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=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, Nov 14, 2025 at 09:13:01AM -0500, Pasha Tatashin wrote: > On Fri, Nov 14, 2025 at 2:30 AM Mike Rapoport wrote: > > > > On Mon, Nov 10, 2025 at 01:07:15PM -0500, Pasha Tatashin wrote: > > > Upcoming LUO requires KHO for its operations, the requirement to place > > > both KHO=on and liveupdate=on becomes redundant. Set KHO to be enabled > > > by default. > > > > I though more about this and it seems too much of a change. kho=1 enables > > scratch areas and that significantly changes how free pages are distributed > > in the free lists. > > > > Let's go with a Kconfig option we discussed of-list: > > (this is on top of the current mmotm/mm-nonmm-unstable) > > I will include this into the KHO simplification series Please add Alex's Reviewed-by as well. -- Sincerely yours, Mike.