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Sun, 02 Jul 2023 07:11:25 -0700 (PDT) Received: from [192.168.0.103] ([103.131.18.64]) by smtp.gmail.com with ESMTPSA id x48-20020a056a000bf000b0062cf75a9e6bsm1589746pfu.131.2023.07.02.07.11.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 02 Jul 2023 07:11:25 -0700 (PDT) Message-ID: <306e4057-5e40-f0c1-d06b-2adab0eee37d@gmail.com> Date: Sun, 2 Jul 2023 21:11:15 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: Memory corruption in multithreaded user space program while calling fork Content-Language: en-US To: Jacob Young Cc: Suren Baghdasaryan , Andrew Morton , Laurent Dufour , Linux Kernel Mailing List , Linux Regressions , Linux Memory Management , Linux PowerPC , Linux ARM References: From: Bagas Sanjaya In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 09E9F140011 X-Stat-Signature: 5ht5bzdp5z8eakbou9pegqmjejtfk9y9 X-HE-Tag: 1688307086-878400 X-HE-Meta: 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 iV2zce+H 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 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: On 7/2/23 19:40, Jacob Young wrote: >> Jacob: Can you repeat bisection please? Why did you skip VMA lock-based > page fault commits in your bisection? > > All skips were due to compile errors of the form: > make[3]: 'install_headers' is up to date. > In file included from ./include/linux/memcontrol.h:20, >                  from ./include/linux/swap.h:9, >                  from ./include/linux/suspend.h:5, >                  from arch/x86/kernel/asm-offsets.c:14: > ./include/linux/mm.h: In function ‘vma_try_start_write’: > ./include/linux/mm.h:702:37: error: ‘struct vm_area_struct’ has no member named ‘vm_lock’ >   702 |         if (!down_write_trylock(&vma->vm_lock->lock)) >       |                                     ^~ > ./include/linux/mm.h:706:22: error: ‘struct vm_area_struct’ has no member named ‘vm_lock’ >   706 |         up_write(&vma->vm_lock->lock); >       |                      ^~ > make[1]: *** [scripts/Makefile.build:114: arch/x86/kernel/asm-offsets.s] Error 1 > make: *** [Makefile:1286: prepare0] Error 2 > 1. 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