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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 466DEC43458 for ; Tue, 30 Jun 2026 07:22:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 27BB66B00A4; Tue, 30 Jun 2026 03:22:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 22CF36B00A5; Tue, 30 Jun 2026 03:22:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 11ACE6B00A6; Tue, 30 Jun 2026 03:22:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id DAEFC6B00A4 for ; Tue, 30 Jun 2026 03:22:24 -0400 (EDT) Received: from smtpin16.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 3030D403D2 for ; Tue, 30 Jun 2026 07:22:24 +0000 (UTC) X-FDA: 84935735808.16.62BD28E Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf30.hostedemail.com (Postfix) with ESMTP id 762EB80007 for ; Tue, 30 Jun 2026 07:22:22 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=AYkVcW4v; spf=pass (imf30.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1782804142; b=SClfwJaff4TiqIr5F4RfJ+S2TLSfkkrryL2lAKHFRnycnllMaCx+HLG9WlP23tJpkLh24I dBUqfn+4r43nkisX28J9mkeWBfEIaTrCTRjj17dXYKnVP/1eGVVJ335lbaIIDYTDH7lXvk uT6x2lhedawwDXI7M3GB9jWQrsnV/uc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1782804142; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=oLrSE68xNG5mT8tgW/ijHmTinKP2lAELluUkxa6reBQ=; b=oUE1435oc0TnjVtrMFUws0vRlOZ2xbAaTRF9DkT6+v7rlSbty5YezIEkYqfWKITeoY+e5n BXOVfcrwHFoIhcyPYFdvrMIjm9t6zPD4mPK7s9O8VkUo4/aQaAJ6NICG3Qo0Xqhgrwo1J8 gMwD4G9QYwEkGD0q/nPGTYCbEOre2hE= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=AYkVcW4v; spf=pass (imf30.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id C80A343BE1; Tue, 30 Jun 2026 07:22:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95A841F00A3A; Tue, 30 Jun 2026 07:22:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782804141; bh=oLrSE68xNG5mT8tgW/ijHmTinKP2lAELluUkxa6reBQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AYkVcW4vLvETM8EM9k6g8TRBEKovdAiH65GAjFHQbeyvFHqjqWoXkn3QmRZ7PH/00 Tb8WKGDaVvJi9ya9hB1uXMOtF3Q6RqjaA/exQOsoQQmIGlpg2daX8IbkD2ldOLgX1a 6F7D+Fw7fmDyUwDVa5l5D11NQop9CWIjW7uUSsshRFJg7y4xY21KuoPOHMQLLv4HqE NbnKZew5zoxyrJlTPnH/K6Ml8EgKol9UQ40oTWYZSL5Q6WuIPd5PtmM4cYknVpUn5f 7bebsE7cZu3Py1vd59obinwsEByOgwHcNEMN7g88533Iz7/YjBtkDQVx8WlKgVgwiV HH5FWuhly1C2A== From: Mike Rapoport To: linux-mm@kvack.org Cc: Andrew Morton , David Hildenbrand , Mike Rapoport , Taku Izumi , Wei Yang , Yuan Liu , linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror Date: Tue, 30 Jun 2026 10:22:11 +0300 Message-ID: <20260630072212.624305-2-rppt@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260630072212.624305-1-rppt@kernel.org> References: <20260630072212.624305-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 762EB80007 X-Stat-Signature: zex9rbh5gs69w7dfprcr917bpwmknom9 X-HE-Tag: 1782804142-958643 X-HE-Meta: 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 S73Gbak1 XPtFnq0HEug9vKnzdvUFu0yWop4NCmbjFk399v/Vc8i4n6lr3i9odie2Y0BZS5yhzdCFqdoCfP1oYnwz3SHDGnF9Xk/VrYiNg/s0psCmQw9vu48/BX6aslJ7yvzCKGMPRxLsn6K88KpkPPzMNzcijPj6oEYTDgFWal+qPefNck4C54MEGM0zYICPAU1qFVjziFgiFb2EUNv/1Ve7JgTZrqP4dN9UeLnxlcfbCC6wjlfzE5HsIbp5zoGUq8RrCEWZ7v1D3vdyz5q8RlTyUaf240SjTythkbMExau6NKFxFPrDu2tto6MApLJHgAdYA1N9oF7d3ZrH2VrpKtEGoZK7RkAiwDZYB6uy9aZsXTU9ApYUU5IU/hSSZ87Spg8KOO4ud5P/y Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Mike Rapoport (Microsoft)" When kernelcore or movablecore kernel parameters define size of the NORMAL and MOVABLE zones as percents of the total memory or by absolute value, ZONE_NORMAL is clamped at the beginning of ZONE_MOVABLE. However, when kernelcore=mirror the ZONE_NORMAL span is not changed but rather pages from ZONE_MOVABLE counted as absent in ZONE_NORMAL. Make the behaviour of kernelcore= parameter uniform and treat mirror just as another way to size the zones. Co-developed-by: Wei Yang Signed-off-by: Wei Yang Signed-off-by: Mike Rapoport (Microsoft) --- mm/mm_init.c | 36 +++--------------------------------- 1 file changed, 3 insertions(+), 33 deletions(-) diff --git a/mm/mm_init.c b/mm/mm_init.c index 0f64909e8d20..57923dd33d06 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1174,9 +1174,8 @@ static void __init adjust_zone_range_for_zone_movable(int nid, arch_zone_highest_possible_pfn[movable_zone]); /* Adjust for ZONE_MOVABLE starting within this range */ - } else if (!mirrored_kernelcore && - *zone_start_pfn < zone_movable_pfn[nid] && - *zone_end_pfn > zone_movable_pfn[nid]) { + } else if (*zone_start_pfn < zone_movable_pfn[nid] && + *zone_end_pfn > zone_movable_pfn[nid]) { *zone_end_pfn = zone_movable_pfn[nid]; /* Check if this whole range is within ZONE_MOVABLE */ @@ -1224,40 +1223,11 @@ static unsigned long __init zone_absent_pages_in_node(int nid, unsigned long zone_start_pfn, unsigned long zone_end_pfn) { - unsigned long nr_absent; - /* zone is empty, we don't have any absent pages */ if (zone_start_pfn == zone_end_pfn) return 0; - nr_absent = __absent_pages_in_range(nid, zone_start_pfn, zone_end_pfn); - - /* - * ZONE_MOVABLE handling. - * Treat pages to be ZONE_MOVABLE in ZONE_NORMAL as absent pages - * and vice versa. - */ - if (mirrored_kernelcore && zone_movable_pfn[nid]) { - unsigned long start_pfn, end_pfn; - struct memblock_region *r; - - for_each_mem_region(r) { - start_pfn = clamp(memblock_region_memory_base_pfn(r), - zone_start_pfn, zone_end_pfn); - end_pfn = clamp(memblock_region_memory_end_pfn(r), - zone_start_pfn, zone_end_pfn); - - if (zone_type == ZONE_MOVABLE && - memblock_is_mirror(r)) - nr_absent += end_pfn - start_pfn; - - if (zone_type == ZONE_NORMAL && - !memblock_is_mirror(r)) - nr_absent += end_pfn - start_pfn; - } - } - - return nr_absent; + return __absent_pages_in_range(nid, zone_start_pfn, zone_end_pfn); } /* -- 2.53.0