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 X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2DB2C433ED for ; Wed, 7 Apr 2021 17:26:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5545761242 for ; Wed, 7 Apr 2021 17:26:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5545761242 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C8B796B0073; Wed, 7 Apr 2021 13:26:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C3B6A6B0078; Wed, 7 Apr 2021 13:26:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ADDF86B007D; Wed, 7 Apr 2021 13:26:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0089.hostedemail.com [216.40.44.89]) by kanga.kvack.org (Postfix) with ESMTP id 90C886B0073 for ; Wed, 7 Apr 2021 13:26:41 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 41361181AF5D8 for ; Wed, 7 Apr 2021 17:26:41 +0000 (UTC) X-FDA: 78006250602.29.8FDD3A1 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf29.hostedemail.com (Postfix) with ESMTP id 4A27EF2 for ; Wed, 7 Apr 2021 17:26:39 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id C1CB761245; Wed, 7 Apr 2021 17:26:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617816400; bh=X0TznhRQ1rNxYkaGVTvSVgcMdtW1s20eY3i7PGc1DyI=; h=From:To:Cc:Subject:Date:From; b=kIKMCnKJHZUhcF0j7TRm268bp2eLc+q8uBA03fX/4M51X2fyLiGbYbJgsb9Uo6I21 HPBaSbHjaY8Mt3/O+jXaBNnl3BEfPKofjxGs0J75TytOzfeyrX0HvfdhsOZPqUkttf Fgy+TmPa8WFe0YIEAphXWes1GOYabuwCcpMq7ZNwXyik97KHKI+djm/2MmvE77Rvdh vj6VilT6ua5X/fbpSGuFEuS+maCIfhyV4iKeBsfNa1No+2Z3MtRYTEBE9SkwsE9EnL nz6LnCgVALJzCe0wx0D5RN8cd6PH273SeFkyj0yLGbNbbzxsOCgrxMG6SjEeW5+yE8 ka5t4bs9ftKMg== From: Mike Rapoport To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Ard Biesheuvel , Catalin Marinas , David Hildenbrand , Marc Zyngier , Mark Rutland , Mike Rapoport , Mike Rapoport , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC/RFT PATCH 0/3] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Wed, 7 Apr 2021 20:26:04 +0300 Message-Id: <20210407172607.8812-1-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 4A27EF2 X-Stat-Signature: kiapatawp6jzmohkxqhuhz3yqdkbgzzq Received-SPF: none (kernel.org>: No applicable sender policy available) receiver=imf29; identity=mailfrom; envelope-from=""; helo=mail.kernel.org; client-ip=198.145.29.99 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1617816399-531414 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport Hi, These patches aim to remove CONFIG_HOLES_IN_ZONE and essentially hardwire pfn_valid_within() to 1.=20 The idea is to mark NOMAP pages as reserved in the memory map and restore the intended semantics of pfn_valid() to designate availability of struct page for a pfn. With this the core mm will be able to cope with the fact that it cannot u= se NOMAP pages and the holes created by NOMAP ranges within MAX_ORDER blocks will be treated correctly even without the need for pfn_valid_within. The patches are only boot tested on qemu-system-aarch64 so I'd really appreciate memory stress tests on real hardware. If this actually works we'll be one step closer to drop custom pfn_valid(= ) on arm64 altogether. Mike Rapoport (3): memblock: update initialization of reserved pages arm64: decouple check whether pfn is normal memory from pfn_valid() arm64: drop pfn_valid_within() and simplify pfn_valid() arch/arm64/Kconfig | 3 --- arch/arm64/include/asm/memory.h | 2 +- arch/arm64/include/asm/page.h | 1 + arch/arm64/kvm/mmu.c | 2 +- arch/arm64/mm/init.c | 10 ++++++++-- arch/arm64/mm/ioremap.c | 4 ++-- arch/arm64/mm/mmu.c | 2 +- mm/memblock.c | 23 +++++++++++++++++++++-- 8 files changed, 35 insertions(+), 12 deletions(-) base-commit: e49d033bddf5b565044e2abe4241353959bc9120 --=20 2.28.0