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 392D83D88EB; Wed, 13 May 2026 08:39:06 +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=1778661547; cv=none; b=g27vriHTAoPiZBcHWS9g2r0+8jlclWPkjfLz9UgZ9JURo655kiU2GT4C00cK8GAHg+B9XZrJ4h5qzUYTUBTnflvNU/qv/Gv7i6FOiTi7oZRRdMPX51ApBFtMjuV+GB1cUtHDCjdhCz/b0LsbOqDXbbXMOZ2p45b/ZNLPh4ZrfOg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778661547; c=relaxed/simple; bh=A+alEkVbDEYYLkoEGrsz9cm8DsNiefv/WIMetnJZ4aA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=B/QTp0o2sk4eA/K7+ORLUQy3Mzn+jzsLuxeqZBvriQtZlGsH1YEk7TdCDok3jfH+PROl2ysFvUGLtl49o4tSXlbmeaLhr0hhfxDCjkgxjmvfB8As7/2n024i0EVpwM5M02ih/msCi9cjvBHSQzmMciMgHqG/rXG+DuscQFnqu6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i5o2b94C; 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="i5o2b94C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C496EC2BCB7; Wed, 13 May 2026 08:38:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778661546; bh=A+alEkVbDEYYLkoEGrsz9cm8DsNiefv/WIMetnJZ4aA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=i5o2b94CuXzH2xo1vE/DUzE4IguK5/np+Jsb57LZ3NB3zL8hSI80f7ACMbgEeHtAP qV9dcRBrrPGWTvrCfK3ozf6Q/Nh4quN4g1L//ckWLJ5IZBF9wcexyyeHeoSRxNtPFH 5N9yNX4d6ez9CMAHkKOf9Q8JiXvXQhoxZZdpf8TvK+Byg36ZnOCAuDu9QuNuCfrEwH Qm78NZa6NaXCcHKglUgtQMONd4VPk8qQQ87YzAm64xITK4kwsanSFW8xhr76ovDxnp r4CIUxQc9Mt49yJ2jK7gSCRV3umP23VsjLZA5UF5Ta5xnIWTZ1tKagj3rn4mhxaYzQ HWhG0Vzd8dUdQ== Date: Wed, 13 May 2026 11:38:56 +0300 From: Mike Rapoport To: "David Hildenbrand (Arm)" Cc: "David S. Miller" , Andreas Larsson , Andrew Morton , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH 6/8] mm/bootmem_info: stop marking mem_section_usage as MIX_SECTION_INFO Message-ID: References: <20260511-bootmem_info_prep-v1-0-3fb0be6fc688@kernel.org> <20260511-bootmem_info_prep-v1-6-3fb0be6fc688@kernel.org> Precedence: bulk X-Mailing-List: linux-s390@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: <20260511-bootmem_info_prep-v1-6-3fb0be6fc688@kernel.org> On Mon, May 11, 2026 at 04:05:34PM +0200, David Hildenbrand (Arm) wrote: > We never free the ms->usage data for boot memory sections (see > section_deactivate()). And to identify whether ms->usage was allocated > from memblock, we simply identify it by looking at PG_reserved. > > Consequently, there is no need to mark ms->usage as MIX_SECTION_INFO. > Let's just stop doing that. > > Signed-off-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) > --- > mm/bootmem_info.c | 12 +----------- > 1 file changed, 1 insertion(+), 11 deletions(-) > > diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c > index cce1d560f094..0fa78db7fbc0 100644 > --- a/mm/bootmem_info.c > +++ b/mm/bootmem_info.c > @@ -38,10 +38,8 @@ void put_page_bootmem(struct page *page) > > static void __init register_page_bootmem_info_section(unsigned long start_pfn) > { > - unsigned long mapsize, section_nr, i; > + unsigned long section_nr; > struct mem_section *ms; > - struct mem_section_usage *usage; > - struct page *page; > > start_pfn = SECTION_ALIGN_DOWN(start_pfn); > section_nr = pfn_to_section_nr(start_pfn); > @@ -50,14 +48,6 @@ static void __init register_page_bootmem_info_section(unsigned long start_pfn) > if (!preinited_vmemmap_section(ms)) > register_page_bootmem_memmap(section_nr, pfn_to_page(start_pfn), > PAGES_PER_SECTION); > - > - usage = ms->usage; > - page = virt_to_page(usage); > - > - mapsize = PAGE_ALIGN(mem_section_usage_size()) >> PAGE_SHIFT; > - > - for (i = 0; i < mapsize; i++, page++) > - get_page_bootmem(section_nr, page, MIX_SECTION_INFO); > } > > void __init register_page_bootmem_info_node(struct pglist_data *pgdat) > > -- > 2.43.0 > -- Sincerely yours, Mike.