linux-kernel - Re: [PATCH V1 2/2] mm/damon/core: remove duplicate check about THP

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Message-ID: <891e03e1-1071-d1a4-a40c-fe537105b402@linux.alibaba.com>
Date:   Fri, 16 Sep 2022 09:37:33 +0800
From:   haoxin <xhao@...ux.alibaba.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        kernel test robot <lkp@...el.com>
Cc:     sj@...nel.org, llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V1 2/2] mm/damon/core: remove duplicate check about THP


在 2022/9/16 上午6:26, Andrew Morton 写道:
> On Fri, 16 Sep 2022 05:54:56 +0800 kernel test robot <lkp@...el.com> wrote:
>
>> Hi Xin,
>>
>> Thank you for the patch! Yet something to improve:
>>
>> [auto build test ERROR on akpm-mm/mm-everything]
>>
>> url:    https://github.com/intel-lab-lkp/linux/commits/Xin-Hao/mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly/20220915-230635
>> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
>> config: hexagon-randconfig-r002-20220915 (https://download.01.org/0day-ci/archive/20220916/202209160528.6z2rUbjZ-lkp@intel.com/config)
>> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
>> 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
>>          # https://github.com/intel-lab-lkp/linux/commit/7902790b04d0eb74686b55218e8ead191ba5c003
>>          git remote add linux-review https://github.com/intel-lab-lkp/linux
>>          git fetch --no-tags linux-review Xin-Hao/mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly/20220915-230635
>>          git checkout 7902790b04d0eb74686b55218e8ead191ba5c003
>>          # save the config file
>>          mkdir build_dir && cp config build_dir/.config
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash mm/damon/
>>
>> If you fix the issue, kindly add following tag where applicable
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>>> mm/damon/vaddr.c:451:7: error: call to undeclared function 'pmd_young'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>>                     if (pmd_young(*pmd) || !page_is_idle(page) ||
>>                         ^
>>     mm/damon/vaddr.c:451:7: note: did you mean 'pte_young'?
>>     arch/hexagon/include/asm/pgtable.h:273:19: note: 'pte_young' declared here
>>     static inline int pte_young(pte_t pte)
>>                       ^
> Thanks.  I guess the arch needn't implement pmd_young() if it doesn't
> implement THP.
>
> I dropped the patch.
Oh, my bad,  thanks.