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 86C8F1A08AF; Wed, 18 Mar 2026 08:20:21 +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=1773822021; cv=none; b=a1NWEOU3yYbjLN5vB9cRSL3cyI3um+9qXpaipw2WcWOs/iemFL0lvUakxCJZnE//fd9PsNOvT4R0LbqyoMNWKRpguxbvbJ7SpsXHFoQhdz65VhGiDCSLKpZF28Oy1Mr1gfIjFr9cvG7ONx1aYGrNZPa28qOjRGe6ih6el5lBaSk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773822021; c=relaxed/simple; bh=aQAhk0sXXDYLvUo6haMj9vWgsIfwV36jAQ6E1OobyX4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FPm0yCddqYLu7Sg9i1m/fa5KbC3nE7p1LTFzdqWyd8uI1GQSR68+NAM0Jzg3X2gMOvuGgJHOxOdF1HX2S982L1DCpBjeXl57E1AHSydTjMzEZRcldyWmmONS/Cz8v5DTgeyAMoF8bD/GykI9hBxUuH5rXl5PZx4T2s+KP0fgO7I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jXWpygRH; 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="jXWpygRH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B42A2C19421; Wed, 18 Mar 2026 08:20:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773822021; bh=aQAhk0sXXDYLvUo6haMj9vWgsIfwV36jAQ6E1OobyX4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jXWpygRHCWyhLEE+w7ya/9J5hxUvfUcyAIJcOaTEBfJjhiXVhVNFnzwLsLn1x8tcA GwfaCkHE2oYzOmw1atEtba+VRHMoKJkrkkaWPZ7WI8cI8jLXOsrrzzF6oRq9OcLXCa 8ZYJgbIBXVc7B6FZTaXzmobFa/fjhQzwZiIDatb1bXsoZtsVl5qsagoo88d3eTuENG 8wN7AgE5PS+nBmxjL7Kvs2VplQoCI5CIIH+okwNXGzu4pSmGklVacd6cLC7ld3YUKq yqaivLf5KshOZ/aId7JS/WdnDCiS1rsdDdWARgFNJXGlxxG8MRt8SXskbTaBWz2YtO tuyTLdBlJTaMw== Date: Wed, 18 Mar 2026 10:20:14 +0200 From: Mike Rapoport To: "David Hildenbrand (Arm)" Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-cxl@vger.kernel.org, Andrew Morton , Oscar Salvador , Axel Rasmussen , Yuanchu Xie , Wei Xu , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko Subject: Re: [PATCH 07/14] mm/bootmem_info: avoid using sparse_decode_mem_map() Message-ID: References: <20260317165652.99114-1-david@kernel.org> <20260317165652.99114-8-david@kernel.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: <20260317165652.99114-8-david@kernel.org> On Tue, Mar 17, 2026 at 05:56:45PM +0100, David Hildenbrand (Arm) wrote: > With SPARSEMEM_VMEMMAP, we can just do a pfn_to_page(). It is not super > clear whether the start_pfn is properly aligned ... so let's just make > sure it is. > > We will soon might try to remove the bootmem info completely, for now, > just keep it working as is. > > Signed-off-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) > --- > mm/bootmem_info.c | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-) > > diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c > index e61e08e24924..3d7675a3ae04 100644 > --- a/mm/bootmem_info.c > +++ b/mm/bootmem_info.c > @@ -44,17 +44,16 @@ static void __init register_page_bootmem_info_section(unsigned long start_pfn) > { > unsigned long mapsize, section_nr, i; > struct mem_section *ms; > - struct page *page, *memmap; > struct mem_section_usage *usage; > + struct page *page; > > + start_pfn = SECTION_ALIGN_DOWN(start_pfn); > section_nr = pfn_to_section_nr(start_pfn); > ms = __nr_to_section(section_nr); > > - memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr); > - > if (!preinited_vmemmap_section(ms)) > - register_page_bootmem_memmap(section_nr, memmap, > - PAGES_PER_SECTION); > + register_page_bootmem_memmap(section_nr, pfn_to_page(start_pfn), > + PAGES_PER_SECTION); > > usage = ms->usage; > page = virt_to_page(usage); > -- > 2.43.0 > -- Sincerely yours, Mike.