From patchwork Tue Jul 30 06:46:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: alexs@kernel.org X-Patchwork-Id: 13746752 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C49A1C3DA70 for ; Tue, 30 Jul 2024 06:42:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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=rhQUj8Sem8h4DJTPq9U8XuSsC2jDQti0jRhStqJcJ0g=; b=W64TUZmyHgLhjV w8TTKZtbHKKyVDvtZhBneveAeXcWn6pr3LEqMZo9O3Q53ZfJOcC/gNQLNZLdjWqmgETwQPy4kexQE 81kYxhx5Bvh7FbPgzaDIWnW1DIHp3F7AEZ0zxah4tAhSSjiVxdQFhhECfajpgLTsISEk6j5oyWE24 sfUKZzVCfkNOEAXCseWl7tIj0qagHjK626dNq3Hm5/w7A3wypO/nCkbws1/aWjdBIpqK26m9vm6HG NUHTx4GDJkCCr5L85y0Jds5yJl1Zy6VIwmnFgNaO0zvZlYXbU/joUXkwBRCW14bzbmtVe83qreQZZ Ts0XJqOc+L946efsmUKg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYgZR-0000000DrwC-2aBx; Tue, 30 Jul 2024 06:42:53 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYgZN-0000000Drv4-2IYg; Tue, 30 Jul 2024 06:42:51 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 42FDACE0B2F; Tue, 30 Jul 2024 06:42:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B562C32782; Tue, 30 Jul 2024 06:42:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722321766; bh=9fMo0SqZ7mOf+MpuDKzR6wBE4n9v1usaMOUOV+GRiz8=; h=From:To:Cc:Subject:Date:From; b=odNyHSwOlBtV2oqVtExlin1GDO7kYlIOx8pVUXrIJUKZbGYwA4WqDas0/GxrcEr55 U96WNS8VFoK93eKlrMoYeKy3Hx5hYk7u0MHfPCvnoc4pMqeCyLihL2sOgCRB2BK0LQ L8992A0T1NOO7inaUSioa2w4g0sAStq/hkXExqTSsAXodpT6mGb0xRWKuDd+nH2N+A BTsDqxMoTTjSETReBcCKjEeWWC7pCscYpqZJszwilu2vcMmxr/pCQlNwRRubPXHBaB JADt14YJLrGWRmg/Gsmy3mjRBjVlp6DBpI92v1G7zStat5RwD14Iv/xZapDPo4c7xq lwWpWj2GOPung== From: alexs@kernel.org To: Will Deacon , "Aneesh Kumar K . V" , Nick Piggin , Peter Zijlstra , Russell King , Catalin Marinas , Brian Cain , WANG Xuerui , Geert Uytterhoeven , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Michael Ellerman , Naveen N Rao , Paul Walmsley , Albert Ou , Thomas Gleixner , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Andy Lutomirski , Bibo Mao , Baolin Wang , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Qi Zheng , Vishal Moola , "Aneesh Kumar K . V" , Kemeng Shi , Lance Yang , Peter Xu , Barry Song , linux-s390@vger.kernel.org Cc: Guo Ren , Christophe Leroy , Palmer Dabbelt , Mike Rapoport , Oscar Salvador , Alexandre Ghiti , Jisheng Zhang , Samuel Holland , Anup Patel , Josh Poimboeuf , Breno Leitao , Alexander Gordeev , Gerald Schaefer , Hugh Dickins , David Hildenbrand , Ryan Roberts , Matthew Wilcox , Alex Shi Subject: [RFC PATCH 00/18] use struct ptdesc to replace pgtable_t Date: Tue, 30 Jul 2024 14:46:54 +0800 Message-ID: <20240730064712.3714387-1-alexs@kernel.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240729_234249_965496_9D9BF1E9 X-CRM114-Status: GOOD ( 11.40 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Alex Shi We have struct ptdesc for page table descriptor a year ago, but it has no much usages in kernel, while pgtable_t is used widely. The pgtable_t is typedefed as 'pte_t *' in sparc, s390, powerpc and m68k except SUN3, others archs are all same as 'struct page *'. These blocks the conception and code update for page table descriptor to struct ptdesc. So, the simple idea to push the ptdesc conception forward is to update all pgtable_t by ptdesc or pte_t pointer. But this needs widely knowledges for most all of different archs. Common code change is easy for include/ and mm/ directory, but it's hard in all archs. Thanks for intel LKP framework, I fixed most all of build issues except a bug on powerpc which reports a "struct ptdesc *" incompatible with struct ptdesc *' pointer issue... Another trouble is pmd_pgtable() conversion in the last patch. Maybe some of arch need define theirself own pmd_ptdesc()? This patchset is immature, even except above 2 issues, I just tested virutal machine booting and kselftest mm on x86 and arm64. Anyway any input are appreciated! Thanks Alex Alex Shi (18): mm/pgtable: use ptdesc in pte_free_now/pte_free_defer mm/pgtable: convert ptdesc.pmd_huge_pte to ptdesc pointer fs/dax: use ptdesc in dax_pmd_load_hole mm/thp: use ptdesc pointer in __do_huge_pmd_anonymous_page mm/thp: use ptdesc in do_huge_pmd_anonymous_page mm/thp: convert insert_pfn_pmd and its caller to use ptdesc mm/thp: use ptdesc in copy_huge_pmd mm/memory: use ptdesc in __pte_alloc mm/pgtable: fully use ptdesc in pte_alloc_one series functions mm/pgtable: pass ptdesc to pte_free() mm/pgtable: introduce ptdesc_pfn and use ptdesc in free_pte_range() mm/thp: pass ptdesc to set_huge_zero_folio function mm/pgtable: return ptdesc pointer in pgtable_trans_huge_withdraw mm/pgtable: use ptdesc in pgtable_trans_huge_deposit mm/pgtable: pass ptdesc to pmd_populate mm/pgtable: pass ptdesc to pmd_install mm: convert vmf.prealloc_pte to struct ptdesc pointer mm/pgtable: pass ptdesc in pte_free_defer arch/alpha/include/asm/pgalloc.h | 4 +- arch/arc/include/asm/pgalloc.h | 4 +- arch/arm/include/asm/pgalloc.h | 13 +-- arch/arm/include/asm/tlb.h | 4 +- arch/arm/mm/pgd.c | 2 +- arch/arm64/include/asm/pgalloc.h | 4 +- arch/arm64/include/asm/tlb.h | 4 +- arch/csky/include/asm/pgalloc.h | 4 +- arch/hexagon/include/asm/pgalloc.h | 8 +- arch/loongarch/include/asm/pgalloc.h | 8 +- arch/m68k/include/asm/motorola_pgalloc.h | 12 +- arch/m68k/include/asm/sun3_pgalloc.h | 4 +- arch/microblaze/include/asm/pgalloc.h | 2 +- arch/mips/include/asm/pgalloc.h | 4 +- arch/nios2/include/asm/pgalloc.h | 4 +- arch/openrisc/include/asm/pgalloc.h | 8 +- arch/parisc/include/asm/pgalloc.h | 2 +- arch/powerpc/include/asm/book3s/32/pgalloc.h | 4 +- arch/powerpc/include/asm/book3s/64/hash-4k.h | 4 +- arch/powerpc/include/asm/book3s/64/hash-64k.h | 4 +- arch/powerpc/include/asm/book3s/64/pgalloc.h | 4 +- arch/powerpc/include/asm/book3s/64/pgtable.h | 8 +- arch/powerpc/include/asm/book3s/64/radix.h | 4 +- arch/powerpc/include/asm/pgalloc.h | 8 +- arch/powerpc/mm/book3s64/hash_pgtable.c | 10 +- arch/powerpc/mm/book3s64/radix_pgtable.c | 10 +- arch/riscv/include/asm/pgalloc.h | 8 +- arch/s390/include/asm/pgalloc.h | 4 +- arch/s390/include/asm/pgtable.h | 4 +- arch/s390/mm/pgalloc.c | 2 +- arch/s390/mm/pgtable.c | 14 +-- arch/sh/include/asm/pgalloc.h | 4 +- arch/sparc/include/asm/pgalloc_32.h | 6 +- arch/sparc/include/asm/pgalloc_64.h | 2 +- arch/sparc/include/asm/pgtable_64.h | 4 +- arch/sparc/mm/init_64.c | 2 +- arch/sparc/mm/srmmu.c | 6 +- arch/sparc/mm/tlb.c | 14 +-- arch/x86/include/asm/pgalloc.h | 10 +- arch/x86/mm/pgtable.c | 8 +- arch/xtensa/include/asm/pgalloc.h | 12 +- fs/dax.c | 14 +-- include/asm-generic/pgalloc.h | 10 +- include/linux/mm.h | 16 ++- include/linux/mm_types.h | 4 +- include/linux/pgtable.h | 6 +- mm/debug_vm_pgtable.c | 6 +- mm/huge_memory.c | 103 +++++++++--------- mm/internal.h | 2 +- mm/khugepaged.c | 14 +-- mm/memory.c | 15 +-- mm/mremap.c | 2 +- mm/pgtable-generic.c | 37 +++---- 53 files changed, 240 insertions(+), 236 deletions(-)