linux-kernel - Re: [PATCH] mm: huge_memory: a new debugfs interface for splitting THP tests.

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Message-ID: <6D152AE0-2B5D-412C-94E8-170116E94C82@nvidia.com>
Date:   Mon, 08 Mar 2021 14:36:18 -0500
From:   "Zi Yan" <ziy@...dia.com>
To:     "kernel test robot" <lkp@...el.com>
Cc:     "Zi Yan" <zi.yan@...t.com>, linux-mm@...ck.org, kbuild-all@...org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        "Andrew Morton" <akpm@...ux-foundation.org>,
        "Shuah Khan" <skhan@...uxfoundation.org>,
        "John Hubbard" <jhubbard@...dia.com>,
        "Sandipan Das" <sandipan@...ux.ibm.com>
Subject: Re: [PATCH] mm: huge_memory: a new debugfs interface for splitting
 THP tests.

On 8 Mar 2021, at 14:23, kernel test robot wrote:

> Hi Zi,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on kselftest/next]
> [also build test ERROR on linux/master linus/master v5.12-rc2 next-20210305]
> [cannot apply to hnaz-linux-mm/master]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url:    https://github.com/0day-ci/linux/commits/Zi-Yan/mm-huge_memory-a-new-debugfs-interface-for-splitting-THP-tests/20210308-232339
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
> config: x86_64-randconfig-a015-20210308 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 3a11a41795bec548e91621caaa4cc00fc31b2212)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install x86_64 cross compiling tool for clang build
>         # apt-get install binutils-x86-64-linux-gnu
>         # https://github.com/0day-ci/linux/commit/961321af55684845ebc1e13e4c4e7c0da14a476a
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Zi-Yan/mm-huge_memory-a-new-debugfs-interface-for-splitting-THP-tests/20210308-232339
>         git checkout 961321af55684845ebc1e13e4c4e7c0da14a476a
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>>> mm/huge_memory.c:3026:40: error: implicit declaration of function 'vma_migratable' [-Werror,-Wimplicit-function-declaration]
>                    if (!vma || addr < vma->vm_start || !vma_migratable(vma))
>                                                         ^
>    1 error generated.

There is no need to call vma_migratable() here. Will remove it.

Thanks for catching it.


—
Best Regards,
Yan Zi

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