Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
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 <jacobly.alt@gmail.com>
Cc:     Suren Baghdasaryan <surenb@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Laurent Dufour <ldufour@linux.ibm.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux Memory Management <linux-mm@kvack.org>,
        Linux PowerPC <linuxppc-dev@lists.ozlabs.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
References: <facbfec3-837a-51ed-85fa-31021c17d6ef@gmail.com>
 <CALrpxLe2VagXEhsHPb9P4vJC97hkBYkLswFJB_jmhu1K+x_QhQ@mail.gmail.com>
From:   Bagas Sanjaya <bagasdotme@gmail.com>
In-Reply-To: <CALrpxLe2VagXEhsHPb9P4vJC97hkBYkLswFJB_jmhu1K+x_QhQ@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

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. Please don't send HTML emails as mailing lists reject them.
2. Reply inline with appropriate context, rather than top-post reply.

-- 
An old man doll... just what I always wanted! - Clara