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=-12.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 0FAB8C433B4 for ; Wed, 7 Apr 2021 17:28:55 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7FF256117A for ; Wed, 7 Apr 2021 17:28:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FF256117A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=/8SJMQdibud669Xvv9+BqU0PX9+8N93g+hfruAPTUdw=; b=DCdBbenSnH2Ia3j0bOXLn5A43x J3zp43ZGJK2tgxKDmWQ/ikOPhQ9qq3cmoTDll0XpVcSiDzeTEmVunnmRZvX+WfK6kmM2Tl9UcIWfA vat+AXi9eK9G7UeduvyV7zd8QUXtnWLhnJ3QxujLNOBOLh3cdnS1gSKTGL5ztTRFpG0UVLOQDZBZA J1bNRj4IUnJ1uNKWGYJy5ctwTiN/6Qt6Mzkk8sNSIGtvF+oWXJDrib74vaBtfYrUGqOQ2QUemJlje AfbbRLI0XSdh2Qv4r6Vk8yagoSx7BNjTXHq85HLhmem7Db2Q3cW6VbPSqrNw2TpnqJGwBpYztfg/6 RLD4voew==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lUBx1-005emQ-Ns; Wed, 07 Apr 2021 17:26:47 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lUBwx-005elS-0d for linux-arm-kernel@lists.infradead.org; Wed, 07 Apr 2021 17:26:45 +0000 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210407_182643_297230_90538D1E X-CRM114-Status: GOOD ( 12.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mike Rapoport Hi, These patches aim to remove CONFIG_HOLES_IN_ZONE and essentially hardwire pfn_valid_within() to 1. 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 use 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 -- 2.28.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel