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, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 412ABC43460 for ; Wed, 21 Apr 2021 06:51:22 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 986086142A for ; Wed, 21 Apr 2021 06:51:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 986086142A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id F3A6C4B4A9; Wed, 21 Apr 2021 02:51:20 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6+mJ8rNRx4qq; Wed, 21 Apr 2021 02:51:20 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id F13894B4B5; Wed, 21 Apr 2021 02:51:19 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 566F94B4A9 for ; Wed, 21 Apr 2021 02:51:19 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id I3sC0oM9lf40 for ; Wed, 21 Apr 2021 02:51:18 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 140FB4B47D for ; Wed, 21 Apr 2021 02:51:18 -0400 (EDT) Received: by mail.kernel.org (Postfix) with ESMTPSA id A2A3F6141C; Wed, 21 Apr 2021 06:51:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618987877; bh=h4GND5vJICk88LCJ9meFOAMI9O6wV3PzqLp/IpgFJ7U=; h=From:To:Cc:Subject:Date:From; b=Sa/SkDUfTgVqWZXzIXBK9d2C/yo2XcW+5D8jncWLrCpkTua+0/K3LdRSdZaDn/oq8 p1D+KhoiFeBa8xb6Z9UFllDPVCvaVSylc4lQOskt/bNX2EWVz+04L1Ei3JX7AfH1m4 jgEIE24S7R6HkKcfU/PgPKyQ7hiWJ8SIeoqy6dRhpJkwW6wquRFM6EztRvgUCQrAS7 s04ebkNr/UT6CsAO2UsCDG9mK3cR7ypINnS1jy1X97f7Kteov8DtUApmzFsoxH4cQ4 tX1YfgfNDud8WqTdgTHuC56C/P/VtjXn3CrzXeZAf2nPB0xqd3MXW5BscLfR2ydMK5 uoCF7wb3lZs5g== From: Mike Rapoport To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Wed, 21 Apr 2021 09:51:04 +0300 Message-Id: <20210421065108.1987-1-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Cc: David Hildenbrand , Catalin Marinas , Anshuman Khandual , linux-kernel@vger.kernel.org, Mike Rapoport , linux-mm@kvack.org, kvmarm@lists.cs.columbia.edu, Marc Zyngier , Andrew Morton , Will Deacon , Mike Rapoport X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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. v2: * Add check for PFN overflow in pfn_is_map_memory() * Add Acked-by and Reviewed-by tags, thanks David. v1: Link: https://lore.kernel.org/lkml/20210420090925.7457-1-rppt@kernel.org * Add comment about the semantics of pfn_valid() as Anshuman suggested * Extend comments about MEMBLOCK_NOMAP, per Anshuman * Use pfn_is_map_memory() name for the exported wrapper for memblock_is_map_memory(). It is still local to arch/arm64 in the end because of header dependency issues. rfc: Link: https://lore.kernel.org/lkml/20210407172607.8812-1-rppt@kernel.org Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 54 insertions(+), 13 deletions(-) base-commit: e49d033bddf5b565044e2abe4241353959bc9120 -- 2.28.0 *** BLURB HERE *** Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 | 15 +++++++++++++-- arch/arm64/mm/ioremap.c | 4 ++-- arch/arm64/mm/mmu.c | 2 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 59 insertions(+), 13 deletions(-) -- 2.28.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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=unavailable 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 C60A2C43461 for ; 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bh=ui1c6iqb3NYRvQPNAWsnQc7pK/Q8qnayveBnbEwBcKg=; b=iEsTMPoW0t/3f0RE0b/JRAx5Xp Rej3YRJgK2NxcVocNbewULq3swPzxc1BenPost3d1DROQmK5Fop9Vwx7ed6H50A+HNI8r9YhNoRyX s2Lad4LzF4ypa9ovvXU5psi6Kaj6Z2oZaq7SibLjcka/sZFKCfPwKT73FkZk5Z2iqPzsJrV8yOMDL AbfTlnudwUVn+WMrpFuJQriZh4cjB542RoDpPrNa0bW05ox1XXysvPfFBCc95Ln4AGgurikUm/Uqd 6u0vCKixV0q8P7y/kd6+5pjkBjMdS/Tb8BWKqsQwpUh4VryJpv2RVoL44nNPFAgoJBJYkQsgPVdSr TAY7nH/g==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lZ6hh-00CeRy-Jk for linux-arm-kernel@lists.infradead.org; Wed, 21 Apr 2021 06:51:19 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id A2A3F6141C; Wed, 21 Apr 2021 06:51:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618987877; bh=h4GND5vJICk88LCJ9meFOAMI9O6wV3PzqLp/IpgFJ7U=; h=From:To:Cc:Subject:Date:From; b=Sa/SkDUfTgVqWZXzIXBK9d2C/yo2XcW+5D8jncWLrCpkTua+0/K3LdRSdZaDn/oq8 p1D+KhoiFeBa8xb6Z9UFllDPVCvaVSylc4lQOskt/bNX2EWVz+04L1Ei3JX7AfH1m4 jgEIE24S7R6HkKcfU/PgPKyQ7hiWJ8SIeoqy6dRhpJkwW6wquRFM6EztRvgUCQrAS7 s04ebkNr/UT6CsAO2UsCDG9mK3cR7ypINnS1jy1X97f7Kteov8DtUApmzFsoxH4cQ4 tX1YfgfNDud8WqTdgTHuC56C/P/VtjXn3CrzXeZAf2nPB0xqd3MXW5BscLfR2ydMK5 uoCF7wb3lZs5g== From: Mike Rapoport To: linux-arm-kernel@lists.infradead.org Cc: Andrew Morton , 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: [PATCH v2 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Wed, 21 Apr 2021 09:51:04 +0300 Message-Id: <20210421065108.1987-1-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-20210420_235117_709901_7D86D2AD X-CRM114-Status: GOOD ( 14.43 ) 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. v2: * Add check for PFN overflow in pfn_is_map_memory() * Add Acked-by and Reviewed-by tags, thanks David. v1: Link: https://lore.kernel.org/lkml/20210420090925.7457-1-rppt@kernel.org * Add comment about the semantics of pfn_valid() as Anshuman suggested * Extend comments about MEMBLOCK_NOMAP, per Anshuman * Use pfn_is_map_memory() name for the exported wrapper for memblock_is_map_memory(). It is still local to arch/arm64 in the end because of header dependency issues. rfc: Link: https://lore.kernel.org/lkml/20210407172607.8812-1-rppt@kernel.org Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 54 insertions(+), 13 deletions(-) base-commit: e49d033bddf5b565044e2abe4241353959bc9120 -- 2.28.0 *** BLURB HERE *** Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 | 15 +++++++++++++-- arch/arm64/mm/ioremap.c | 4 ++-- arch/arm64/mm/mmu.c | 2 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 59 insertions(+), 13 deletions(-) -- 2.28.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 413B9C433ED for ; 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Wed, 21 Apr 2021 06:51:18 +0000 (UTC) X-FDA: 78055452636.17.EB80EA9 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf15.hostedemail.com (Postfix) with ESMTP id ABBC9A00038C for ; Wed, 21 Apr 2021 06:51:15 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id A2A3F6141C; Wed, 21 Apr 2021 06:51:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618987877; bh=h4GND5vJICk88LCJ9meFOAMI9O6wV3PzqLp/IpgFJ7U=; h=From:To:Cc:Subject:Date:From; b=Sa/SkDUfTgVqWZXzIXBK9d2C/yo2XcW+5D8jncWLrCpkTua+0/K3LdRSdZaDn/oq8 p1D+KhoiFeBa8xb6Z9UFllDPVCvaVSylc4lQOskt/bNX2EWVz+04L1Ei3JX7AfH1m4 jgEIE24S7R6HkKcfU/PgPKyQ7hiWJ8SIeoqy6dRhpJkwW6wquRFM6EztRvgUCQrAS7 s04ebkNr/UT6CsAO2UsCDG9mK3cR7ypINnS1jy1X97f7Kteov8DtUApmzFsoxH4cQ4 tX1YfgfNDud8WqTdgTHuC56C/P/VtjXn3CrzXeZAf2nPB0xqd3MXW5BscLfR2ydMK5 uoCF7wb3lZs5g== From: Mike Rapoport To: linux-arm-kernel@lists.infradead.org Cc: Andrew Morton , 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: [PATCH v2 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid() Date: Wed, 21 Apr 2021 09:51:04 +0300 Message-Id: <20210421065108.1987-1-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-Stat-Signature: c1ouh74hrrg5kwjhkxps7sqgrgizq3rb X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: ABBC9A00038C Received-SPF: none (kernel.org>: No applicable sender policy available) receiver=imf15; identity=mailfrom; envelope-from=""; helo=mail.kernel.org; client-ip=198.145.29.99 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618987875-224204 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. v2: * Add check for PFN overflow in pfn_is_map_memory() * Add Acked-by and Reviewed-by tags, thanks David. v1: Link: https://lore.kernel.org/lkml/20210420090925.7457-1-rppt@kernel.= org * Add comment about the semantics of pfn_valid() as Anshuman suggested * Extend comments about MEMBLOCK_NOMAP, per Anshuman * Use pfn_is_map_memory() name for the exported wrapper for memblock_is_map_memory(). It is still local to arch/arm64 in the end because of header dependency issues. rfc: Link: https://lore.kernel.org/lkml/20210407172607.8812-1-rppt@kernel= .org Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 54 insertions(+), 13 deletions(-) base-commit: e49d033bddf5b565044e2abe4241353959bc9120 --=20 2.28.0 *** BLURB HERE *** Mike Rapoport (4): include/linux/mmzone.h: add documentation for pfn_valid() memblock: update initialization of reserved pages arm64: decouple check whether pfn is in linear map 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 | 15 +++++++++++++-- arch/arm64/mm/ioremap.c | 4 ++-- arch/arm64/mm/mmu.c | 2 +- include/linux/memblock.h | 4 +++- include/linux/mmzone.h | 11 +++++++++++ mm/memblock.c | 28 ++++++++++++++++++++++++++-- 10 files changed, 59 insertions(+), 13 deletions(-) --=20 2.28.0