From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-176.mta1.migadu.com (out-176.mta1.migadu.com [95.215.58.176]) (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 98D872F9DA1 for ; Thu, 21 May 2026 05:04:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779339857; cv=none; b=d7Y4MEil6I9AuYBDtvGh254ryjCjKQBqDHKpVW1jAthAHmjfIZCdU99C1BNOb1uwmXF9Zkfi9h0h7o5yxEKzT49zi1lDNO/Mwkeg93vTh6IPh7Ak4Y8k4AzKTUU1ivuB7eoPosykR5zJMw5ij9HB1Sl4tz2NNlDNMYeWGm4VIg0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779339857; c=relaxed/simple; bh=udD7mWlkd64piA/1uV3JoogXR6FhB2/z0dczFUqXvp4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=O1JFnJU8iQeFP1kBe6Ez4+C8pMOKjCee1kpnDDdyU8FhJeRmSju3wjxDirdnindeliPhUAZmapDAvvO4unj6Rksc1BoI7W9lHUGktFop/zmHYgmJeQt208FgPtObSPG+PgEoHSQVg/mgCySvXuRMt7xdVf5pfOwz5xiXZZijOgQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=JULoXvF9; arc=none smtp.client-ip=95.215.58.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="JULoXvF9" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1779339843; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=udD7mWlkd64piA/1uV3JoogXR6FhB2/z0dczFUqXvp4=; b=JULoXvF9rBrdxisl033+Bdt9vswxhIhpTxZDs+FlAdkNcEg3HR7Hnujny9LdUKuej4hxLJ iCfAds7VXyCqv+FOPxCKSMUoBQwrw59yeCxPcn5xYNCHYWFqJD7LIMlHe1JAMI794A1wmX BdOajcXyff9GzuTfn9ACSh0PO5UhgKo= From: Lance Yang To: david@kernel.org Cc: davem@davemloft.net, andreas@gaisler.com, rppt@kernel.org, akpm@linux-foundation.org, agordeev@linux.ibm.com, gerald.schaefer@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Lance Yang Subject: Re: [PATCH 6/8] mm/bootmem_info: stop marking mem_section_usage as MIX_SECTION_INFO Date: Thu, 21 May 2026 13:03:39 +0800 Message-Id: <20260521050339.65872-1-lance.yang@linux.dev> In-Reply-To: <20260511-bootmem_info_prep-v1-6-3fb0be6fc688@kernel.org> References: <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=UTF-8 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT 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. Yep, PageReserved() is already enough to tell that case apart :) >Consequently, there is no need to mark ms->usage as MIX_SECTION_INFO. >Let's just stop doing that. Right, MIX_SECTION_INFO doesn't add much here. For ms->usage, removal code doesn't use MIX_SECTION_INFO at all :) >Signed-off-by: David Hildenbrand (Arm) >--- LGTM, feel free to add: Reviewed-by: Lance Yang