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 3DA63C55171 for ; Sun, 2 Aug 2026 11:28:43 +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-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=STGiSUapaesQF2K76oCI6wHZd9Cr8woUwKiuHNgdKL4=; b=T+HtjCXauectZoVE3SPtbI+/31 8yrGdqZHL+LT1fnoMV7dlEUp2/LG5AayT/g/o8Ki7Yjn2OftiHj5wYpNMVGCAyeBG3K94uly0Ll3C Ox/tIyGcpvM8uio3G59arB5XEHdE1Soh55QVQnVWQ870Lxe+SexCVk5rES/enQbMXLL9ZDm2NJSRG mkTacajtWBEuiI2Z4OTade1xCGis+yxe/oJDktyOvGUtnqj4uIhoiWzBP7kT1vnTJnpSP0ZaFBtgR VDXrhyj+VTAVEP323f58smJUAdSDgHkasRBocUJEPo3GyuGRIV5l+G+0mexAUOCTCLLqmYPzR9X+q D7RaQ94w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqUN0-0000000FZZ4-0Skb; Sun, 02 Aug 2026 11:28:42 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqUMz-0000000FZYy-0eSu for kexec@lists.infradead.org; Sun, 02 Aug 2026 11:28:41 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 0FDF76057A; Sun, 2 Aug 2026 11:28:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 723901F000E9; Sun, 2 Aug 2026 11:28:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785670119; bh=STGiSUapaesQF2K76oCI6wHZd9Cr8woUwKiuHNgdKL4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=bgj/n6JEEEDbd7ZONPgf9sWUyp2q0zCHD5DGDiLPtDCCeXXxHHnQ0MgseRuVbjK2R wzUCfFQzRGWTiFuz/t9GTBfimgH4W30WZsfZh3nEYJ1o/tpHnHYujn4C6NExNR6oYu POXvBVfY0egTeSd5rpRgbA+ldG/i4ioUZ2xRgSS4PmqQUCo8bat9fcxXjLfmBkgZFq voXPsmDhnlt0HQGunKulmHWDB7Ickfb3LoUWTQUSdZFNh7BmCpG/a85jZc8NCcNnkq A+4mNpmTgxQ8tKgyCX81yFWteNYHiTPRxSk1YPVfOx47bvbXCO/rv4HflO+AJ9CKSF g0RblB7MwS/IQ== Date: Sun, 2 Aug 2026 14:28:31 +0300 From: Mike Rapoport To: Pratyush Yadav Cc: Pasha Tatashin , Alexander Graf , Muchun Song , Oscar Salvador , David Hildenbrand , Andrew Morton , Jason Miu , Jork Loeser , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 00/22] kho: make boot time huge page allocation work nicely with KHO Message-ID: References: <20260801084833.1897543-1-pratyush@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260801084833.1897543-1-pratyush@kernel.org> 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 Sat, Aug 01, 2026 at 10:48:09AM +0200, Pratyush Yadav wrote: > From: "Pratyush Yadav (Google)" > > Hi, > > Gigantic huge page allocation is somewhat broken currently with KHO. > > Fix this by introducing the concept of extended scratch areas. They are > areas that the kernel discovers on boot by walking the radix tree and > finding free memory ranges. See patch 10 for more details. > > Muchun Song (1): > mm/mm_init: simplify deferred_free_pages() migratetype init > > Pratyush Yadav (Google) (21): > kho: generalize radix tree APIs > kho: make radix max key width more obvious > kho: disallow wide keys in radix tree > kho: return virtual address of mem_map from kho_get_mem_map() > kho: store incoming radix tree in kho_in > kho: move all memory retrieval logic to kho_mem_retrieve() > kho: add a struct for radix callbacks > kho: add callback for table pages > kho: add data argument to radix walk callback > kho: allow early-boot usage of the KHO radix tree > kho: allow destroying KHO radix tree > kho: add kho_radix_init_tree() > kho: expose kho_scratch_overlap() to kexec_handover.h > kho: initialize kho_scratch pointer earlier in boot > kho: initialize preserved memory map radix tree earlier > mm/mm_init: don't rely on memblock to get KHO scratch migratetype > kho: extend scratch > memblock: always include KHO headers > memblock: make HugeTLB bootmem allocation work with KHO > memblock: add memblock_reserved_hugetlb_size() > kho: exclude hugetlb memory from scratch size calculation This is applied now to kho-scratch branch in the liveupdate repo: https://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux.git/log/?h=kho-scratch On top of mm-stable-6d098029de09 branch in Andrew's mm.git. -- Sincerely yours, Mike.