From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 EE6014CDEB for ; Mon, 18 Mar 2024 14:21:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710771714; cv=none; b=MFmLkE3yi6CoH5o+VIc/GHmfM8x/LYCOM+68Ib0Bw31VMgy1+WP6xx41Mjey2wEoVW7gxxE32xh6rIBSm4wbpcTN9Yw0/3IqW6hIvfdeVzRoWUUL+6DzGVexorHpeaB6j1LjET8vMtFt1vgl2J8xECqqo4NnF10S2rWJRpSnxEQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710771714; c=relaxed/simple; bh=fbmmrMFnYH8ln09BbkU1anr7KedTZF03Qizagwy4S3A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-type; b=DSCJQrLZtfGQUS0GGeGVypGaxtGQfeeicfJx5tR6RUAkosykyj/tzsvtmF9Q+4krP3XjbzJHKZ8pBL85694eld/sLcrYhhOiYJ1LL91KqBOMOvxc94+SwW9QUht5D5/6cZOVEJ+eh8CDRRCAnFt0DBB6F54P7lU6Hnn0Bx4YXwU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=K04WwRbW; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="K04WwRbW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710771711; 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; bh=F5ye388VWoErT8xKd/JXdRVRXGFtTvAxoGWVnY3cKSY=; b=K04WwRbWPa/jwg4p6XHqAx7xMTDQz4CQp5LBDpWKm43uiYvfZM7GYqSswwgLYuXtEGXa8K SSdVpnIR9k9P3V0et/yA42t8PO9jo49ZJuzeT+eXhTe4Xs/3KatK6VLRH/yHtKNKF0fsk1 JhA1R1yPz6uaZCw5trF/cjCYSzx9Zvw= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-505-wJFmYP1ANHGgSGjgt3Fcnw-1; Mon, 18 Mar 2024 10:21:49 -0400 X-MC-Unique: wJFmYP1ANHGgSGjgt3Fcnw-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 02C8F3C0F180; Mon, 18 Mar 2024 14:21:49 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.116.12]) by smtp.corp.redhat.com (Postfix) with ESMTP id C88FE492BD0; Mon, 18 Mar 2024 14:21:45 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, akpm@linux-foundation.org, rppt@kernel.org, Baoquan He Subject: [PATCH 0/6] mm/mm_init.c: refactor free_area_init_core() Date: Mon, 18 Mar 2024 22:21:32 +0800 Message-ID: <20240318142138.783350-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 In function free_area_init_core(), the code calculating zone->managed_pages and the subtracting dma_reserve from DMA zone looks very confusing. >From git history, the code calculating zone->managed_pages was for zone->present_pages originally. The early rough assignment is for optimize zone's pcp and water mark setting. Later, managed_pages was introduced into zone to represent the number of managed pages by buddy. Now, zone->managed_pages is zeroed out and reset in mem_init() when calling memblock_free_all(). zone's pcp and wmark setting relying on actual zone->managed_pages are done later than mem_init() invocation. So we don't need rush to early calculate and set zone->managed_pages, just set it as zone->present_pages, will adjust it in mem_init(). And also add a new function calc_nr_kernel_pages() to count up free but not reserved pages in memblock, then assign it to nr_all_pages and nr_kernel_pages after memmap pages are allocated. Baoquan He (6): mm/mm_init.c: remove the useless dma_reserve x86: remove unneeded memblock_find_dma_reserve() mm/mm_init.c: add new function calc_nr_all_pages() mm/mm_init.c: remove meaningless calculation of zone->managed_pages in free_area_init_core() mm/mm_init.c: remove unneeded calc_memmap_size() mm/mm_init.c: remove arch_reserved_kernel_pages() arch/powerpc/include/asm/mmu.h | 4 -- arch/powerpc/kernel/fadump.c | 5 -- arch/x86/include/asm/pgtable.h | 1 - arch/x86/kernel/setup.c | 2 - arch/x86/mm/init.c | 47 ------------- include/linux/mm.h | 4 -- mm/mm_init.c | 117 +++++++++------------------------ 7 files changed, 30 insertions(+), 150 deletions(-) -- 2.41.0