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[2003:cb:c708:8a00:362b:7e34:a3bc:9ddf]) by smtp.gmail.com with ESMTPSA id v16-20020a5d5910000000b003418364032asm15207424wrd.112.2024.03.27.08.39.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 Mar 2024 08:39:46 -0700 (PDT) Message-ID: <3922460a-4d01-4ecb-b8c5-7c57fd46f3fd@redhat.com> Date: Wed, 27 Mar 2024 16:39:45 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 0/3] mm/gup: consistently call it GUP-fast To: Peter Xu Cc: linux-kernel@vger.kernel.org, Andrew Morton , Mike Rapoport , Jason Gunthorpe , John Hubbard , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org, x86@kernel.org, Arnd Bergmann , Ryan Roberts References: <20240327130538.680256-1-david@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240327_083952_913446_D9D8ED68 X-CRM114-Status: GOOD ( 21.39 ) 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 27.03.24 16:21, Peter Xu wrote: > On Wed, Mar 27, 2024 at 02:05:35PM +0100, David Hildenbrand wrote: >> Some cleanups around function names, comments and the config option of >> "GUP-fast" -- GUP without "lock" safety belts on. >> >> With this cleanup it's easy to judge which functions are GUP-fast specific. >> We now consistently call it "GUP-fast", avoiding mixing it with "fast GUP", >> "lockless", or simply "gup" (which I always considered confusing in the >> ode). >> >> So the magic now happens in functions that contain "gup_fast", whereby >> gup_fast() is the entry point into that magic. Comments consistently >> reference either "GUP-fast" or "gup_fast()". >> >> Based on mm-unstable from today. I won't CC arch maintainers, but only >> arch mailing lists, to reduce noise. >> >> Tested on x86_64, cross compiled on a bunch of archs, whereby some of them >> don't properly even compile on mm-unstable anymore in my usual setup >> (alpha, arc, parisc64, sh) ... maybe the cross compilers are outdated, >> but there are no new ones around. Hm. > > I'm not sure what config you tried there; as I am doing some build tests > recently, I found turning off CONFIG_SAMPLES + CONFIG_GCC_PLUGINS could > avoid a lot of issues, I think it's due to libc missing. But maybe not the > case there. CCin Arnd; I use some of his compiler chains, others from Fedora directly. For example for alpha and arc, the Fedora gcc is "13.2.1". I compile quite some targets, usually with defconfig. From my compile script: # COMPILER NAME ARCH CROSS_COMPILE CONFIG(if different from defconfig) compile_gcc "alpha" "alpha" "alpha-linux-gnu-" compile_gcc "arc" "arc" "arc-linux-gnu-" compile_gcc "arm" "arm" "arm-linux-gnu-" "axm55xx_defconfig" compile_gcc "arm-nommu" "arm" "arm-linux-gnu-" "imxrt_defconfig" compile_gcc "arm64" "arm64" "aarch64-linux-gnu-" compile_gcc "csky" "csky" "../cross/gcc-13.2.0-nolibc/csky-linux/bin/csky-linux-" compile_gcc "loongarch" "loongarch" "../cross/gcc-13.2.0-nolibc/loongarch64-linux/bin/loongarch64-linux-" compile_gcc "m68k-nommu" "m68k" "m68k-linux-gnu-" "amcore_defconfig" compile_gcc "m68k-sun3" "m68k" "m68k-linux-gnu-" "sun3_defconfig" compile_gcc "m68k-coldfire" "m68k" "m68k-linux-gnu-" "m5475evb_defconfig" compile_gcc "m68k-virt" "m68k" "m68k-linux-gnu-" "virt_defconfig" compile_gcc "microblaze" "microblaze" "microblaze-linux-gnu-" compile_gcc "mips64" "mips" "mips64-linux-gnu-" "bigsur_defconfig" compile_gcc "mips32-xpa" "mips" "mips64-linux-gnu-" "maltaup_xpa_defconfig" compile_gcc "mips32-alchemy" "mips" "mips64-linux-gnu-" "gpr_defconfig" compile_gcc "mips32" "mips" "mips64-linux-gnu-" compile_gcc "nios2" "nios2" "nios2-linux-gnu-" "3c120_defconfig" compile_gcc "openrisc" "openrisc" "../cross/gcc-13.2.0-nolibc/or1k-linux/bin/or1k-linux-" "virt_defconfig" compile_gcc "parisc32" "parisc" "hppa-linux-gnu-" "generic-32bit_defconfig" compile_gcc "parisc64" "parisc" "hppa64-linux-gnu-" "generic-64bit_defconfig" compile_gcc "riscv32" "riscv" "riscv64-linux-gnu-" "32-bit.config" compile_gcc "riscv64" "riscv" "riscv64-linux-gnu-" "64-bit.config" compile_gcc "riscv64-nommu" "riscv" "riscv64-linux-gnu-" "nommu_virt_defconfig" compile_gcc "s390x" "s390" "s390x-linux-gnu-" compile_gcc "sh" "sh" "../cross/gcc-13.2.0-nolibc/sh4-linux/bin/sh4-linux-" compile_gcc "sparc32" "sparc" "../cross/gcc-13.2.0-nolibc/sparc-linux/bin/sparc-linux-" "sparc32_defconfig" compile_gcc "sparc64" "sparc" "../cross/gcc-13.2.0-nolibc/sparc64-linux/bin/sparc64-linux-" "sparc64_defconfig" compile_gcc "uml64" "um" "" "x86_64_defconfig" compile_gcc "x86" "x86" "" "i386_defconfig" compile_gcc "x86-pae" "x86" "" "i386_defconfig" compile_gcc "x86_64" "x86" "" compile_gcc "xtensa" "xtensa" "../cross/gcc-13.2.0-nolibc/xtensa-linux/bin/xtensa-linux-" "virt_defconfig" compile_gcc "powernv" "powerpc" "../cross/gcc-13.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-" "powernv_defconfig" compile_gcc "pseries" "powerpc" "../cross/gcc-13.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-" "pseries_defconfig" Some of them look like mm-unstable issue, For example, arm64 fails with CC arch/arm64/mm/extable.o In file included from ./include/linux/hugetlb.h:828, from security/commoncap.c:19: ./arch/arm64/include/asm/hugetlb.h:25:34: error: redefinition of 'arch_clear_hugetlb_flags' 25 | #define arch_clear_hugetlb_flags arch_clear_hugetlb_flags | ^~~~~~~~~~~~~~~~~~~~~~~~ ./include/linux/hugetlb.h:840:20: note: in expansion of macro 'arch_clear_hugetlb_flags' 840 | static inline void arch_clear_hugetlb_flags(struct folio *folio) { } | ^~~~~~~~~~~~~~~~~~~~~~~~ ./arch/arm64/include/asm/hugetlb.h:21:20: note: previous definition of 'arch_clear_hugetlb_flags' with t ype 'void(struct folio *)' 21 | static inline void arch_clear_hugetlb_flags(struct folio *folio) | ^~~~~~~~~~~~~~~~~~~~~~~~ In file included from ./include/linux/hugetlb.h:828, from mm/filemap.c:37: ./arch/arm64/include/asm/hugetlb.h:25:34: error: redefinition of 'arch_clear_hugetlb_flags' 25 | #define arch_clear_hugetlb_flags arch_clear_hugetlb_flags | ^~~~~~~~~~~~~~~~~~~~~~~~ ./include/linux/hugetlb.h:840:20: note: in expansion of macro 'arch_clear_hugetlb_flags' 840 | static inline void arch_clear_hugetlb_flags(struct folio *folio) { } | ^~~~~~~~~~~~~~~~~~~~~~~~ ./arch/arm64/include/asm/hugetlb.h:21:20: note: previous definition of 'arch_clear_hugetlb_flags' with type 'void(struct folio *)' 21 | static inline void arch_clear_hugetlb_flags(struct folio *folio) But there is other stuff like (arc): ./arch/arc/include/asm/mmu-arcv2.h: In function 'mmu_setup_asid': ./arch/arc/include/asm/mmu-arcv2.h:82:9: error: implicit declaration of function 'write_aux_reg' [-Werro r=implicit-function-declaration] 82 | write_aux_reg(ARC_REG_PID, asid | MMU_ENABLE); | ^~~~~~~~~~~~~ or (alpha) WARNING: modpost: "saved_config" [vmlinux] is COMMON symbol ERROR: modpost: "memcpy" [fs/reiserfs/reiserfs.ko] undefined! ERROR: modpost: "memcpy" [fs/nfs/nfs.ko] undefined! ERROR: modpost: "memcpy" [fs/nfs/nfsv3.ko] undefined! ERROR: modpost: "memcpy" [fs/nfsd/nfsd.ko] undefined! ERROR: modpost: "memcpy" [fs/lockd/lockd.ko] undefined! ERROR: modpost: "memcpy" [crypto/crypto.ko] undefined! ERROR: modpost: "memcpy" [crypto/crypto_algapi.ko] undefined! ERROR: modpost: "memcpy" [crypto/aead.ko] undefined! ERROR: modpost: "memcpy" [crypto/crypto_skcipher.ko] undefined! ERROR: modpost: "memcpy" [crypto/seqiv.ko] undefined! > > The series makes sense to me, the naming is confusing. Btw, thanks for > posting this as RFC. This definitely has a conflict with the other gup > series that I had; I'll post v4 of that shortly. Yes, I will rebase on top of that! -- Cheers, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel