From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BBF03CEB2C7 for ; Sat, 15 Nov 2025 09:42:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=hI9GPURT1FrsbraIOg+c5sfJwIq07JD/MQ/pZOvc0Io=; b=FBYt7YhlBFy5qIU8DxPb2VhniS B63iwb6CNDw+7OBBuV3po4hMmoC+SJJsVVB7fMSAOefEZa3pkMbTwFRNwDcjXkKWixov4P3yfyfmH nVETXUuyFgPo8n4ojfd3m5nuMlT6B5R4jOuUn3v67oNjoAwwUdoi7SVyhZJvoNa2bEhoTG406GPWe gVjxZ1mLuIPPhRYwq/wtjpQhAd6SqfDOxndrA69B+P3IFPAk2OWAnSq18k9F+ykpNNMT/oAKnX2Re gW1UiPByOxDA24kq/lfio/Vq+GQAG6y412kV2G476+u6hOqetJRfIrKqZ09FJwkI6jjYLcCsOpAri RpMVnEkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vKCnL-0000000DexT-3Kxr; Sat, 15 Nov 2025 09:42:11 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vKCnJ-0000000Dex3-2GC7 for kexec@lists.infradead.org; Sat, 15 Nov 2025 09:42:10 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0724D43880; Sat, 15 Nov 2025 09:42:08 +0000 (UTC) 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> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251115_014209_598103_B4C42EF1 X-CRM114-Status: GOOD ( 12.42 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org 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.