linux-kernel - Re: [PATCH v5 1/4] mm: hugetlb_vmemmap: introduce STRUCT_PAGE_SIZE_IS_POWER_OF

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Date:   Thu, 24 Mar 2022 18:40:43 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        kernel test robot <lkp@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Oscar Salvador <osalvador@...e.de>,
        David Hildenbrand <david@...hat.com>, kbuild-all@...ts.01.org,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Xiongchun duan <duanxiongchun@...edance.com>,
        Muchun Song <smuchun@...il.com>
Subject: Re: [PATCH v5 1/4] mm: hugetlb_vmemmap: introduce
 STRUCT_PAGE_SIZE_IS_POWER_OF_2



On 3/24/2022 6:20 PM, Muchun Song wrote:
> On Thu, Mar 24, 2022 at 5:40 PM Chen, Rong A <rong.a.chen@...el.com> wrote:
>>
>>
>>
>> On 3/24/2022 6:13 AM, Andrew Morton wrote:
>>> On Thu, 24 Mar 2022 06:06:41 +0800 kernel test robot <lkp@...el.com> wrote:
>>>
>>>> Hi Muchun,
>>>>
>>>> Thank you for the patch! Yet something to improve:
>>>>
>>>> [auto build test ERROR on hnaz-mm/master]
>>>> [also build test ERROR on linus/master next-20220323]
>>>> [cannot apply to mcgrof/sysctl-next v5.17]
>>>> [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/Muchun-Song/add-hugetlb_free_vmemmap-sysctl/20220323-205902
>>>> base:   https://github.com/hnaz/linux-mm master
>>>> config: arc-randconfig-r043-20220323 (https://download.01.org/0day-ci/archive/20220324/202203240546.MHJzsBaO-lkp@intel.com/config)
>>>> compiler: arc-elf-gcc (GCC) 11.2.0
>>>> 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/0day-ci/linux/commit/64211be650af117819368a26d7b86c33df5deea4
>>>>           git remote add linux-review https://github.com/0day-ci/linux
>>>>           git fetch --no-tags linux-review Muchun-Song/add-hugetlb_free_vmemmap-sysctl/20220323-205902
>>>>           git checkout 64211be650af117819368a26d7b86c33df5deea4
>>>>           # save the config file to linux build tree
>>>>           mkdir build_dir
>>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc prepare
>>>>
>>>> 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 >>):
>>>>
>>>>>> cc1: fatal error: cannot open 'kernel/bounds.s' for writing: No such file or directory
>>>
>>> It would take a lot of talent for Munchun to have caused this!
>>>
>>> Methinks you just ran out of disk space?
>>
>> Hi Andrew,
>>
>> Thanks for the reply, I tried to apply this patch to the head of
>> mainline and I still can reproduce the error in my local machine:
>>
>> $ wget -q -O -
>> https://lore.kernel.org/lkml/20220323125523.79254-2-songmuchun@bytedance.com/raw
>> | git apply -v
>> $ mkdir build_dir && wget
>> https://download.01.org/0day-ci/archive/20220324/202203240546.MHJzsBaO-lkp@intel.com/config
>> -O build_dir/.config
>> $ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross
>> O=build_dir ARCH=arc olddefconfig prepare
>> make --keep-going CONFIG_OF_ALL_DTBS=y CONFIG_DTC=y
>> CROSS_COMPILE=/home/nfs/0day/gcc-11.2.0-nolibc/arc-elf/bin/arc-elf-
>> --jobs=72 O=build_dir ARCH=arc olddefconfig prepare
>> ...
>> cc1: fatal error: cannot open 'kernel/bounds.s' for writing: No such
>> file or directory
>> compilation terminated.
>> make[3]: *** [../scripts/Makefile.build:121: kernel/bounds.s] Error 1
>> make[3]: Target '__build' not remade because of errors.
>> make[2]: *** [../Makefile:1191: prepare0] Error 2
>> make[2]: Target 'prepare' not remade because of errors.
>>
> 
> Would you help me to test the following patch?  Thanks.

I have confirmed the patch can fix the issue.

Best Regards,
Rong Chen

> 
> diff --git a/Kbuild b/Kbuild
> index 21415c3b2728..a8477c011b1d 100644
> --- a/Kbuild
> +++ b/Kbuild
> @@ -42,7 +42,7 @@ $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
>   struct_page_size-file := include/generated/struct_page_size.h
> 
>   always-y := $(struct_page_size-file)
> -targets := mm/struct_page_size.s
> +targets += mm/struct_page_size.s
> 
>   mm/struct_page_size.s: $(timeconst-file) $(bounds-file)
>