linux-kernel - Re: [PATCH v6] mm/page_owner.c: add llseek for page

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Message-ID: <0190ae72-4f93-0b7e-9a73-7656dfed29f8@quicinc.com>
Date:   Mon, 15 Aug 2022 14:31:29 +0800
From:   Kassey Li <quic_yingangl@...cinc.com>
To:     "Vlastimil Babka (SUSE)" <vbabka@...nel.org>,
        kernel test robot <lkp@...el.com>,
        <akpm@...ux-foundation.org>
CC:     <kbuild-all@...ts.01.org>, <minchan@...nel.org>, <vbabka@...e.cz>,
        <iamjoonsoo.kim@....com>, <linux-kernel@...r.kernel.org>,
        <linux-mm@...ck.org>
Subject: Re: [PATCH v6] mm/page_owner.c: add llseek for page_owner



On 8/11/2022 5:40 PM, Vlastimil Babka (SUSE) wrote:
> On 8/11/22 05:02, Kassey Li wrote:
>> hi, Vlastimil:
>>
>>
>> On 8/10/2022 5:02 PM, kernel test robot wrote:
>>> Hi Kassey,
>>>
>>> Thank you for the patch! Yet something to improve:
>>>
>>> [auto build test ERROR on v5.19]
>>> [also build test ERROR on next-20220810]
>>> [cannot apply to akpm-mm/mm-everything linus/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#_base_tree_information]
>>>
>>> url:
>>> https://github.com/intel-lab-lkp/linux/commits/Kassey-Li/mm-page_owner-c-add-llseek-for-page_owner/20220810-093417
>>> base:    3d7cb6b04c3f3115719235cc6866b10326de34cd
>>> config: parisc-buildonly-randconfig-r004-20220810
>>> (https://download.01.org/0day-ci/archive/20220810/202208101628.o6qUzx50-lkp@intel.com/config)
>>> compiler: hppa-linux-gcc (GCC) 12.1.0
>>> 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/intel-lab-lkp/linux/commit/d2decd69a8d5756c1706092c805a4c8af14df471
>>>           git remote add linux-review https://github.com/intel-lab-lkp/linux
>>>           git fetch --no-tags linux-review
>>> Kassey-Li/mm-page_owner-c-add-llseek-for-page_owner/20220810-093417
>>>           git checkout d2decd69a8d5756c1706092c805a4c8af14df471
>>>           # save the config file
>>>           mkdir build_dir && cp config build_dir/.config
>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross
>>> W=1 O=build_dir ARCH=parisc SHELL=/bin/bash
>>>
>>> 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 >>):
>>>
>>>      In file included from mm/page_owner.c:16:
>>>>> mm/../fs/proc/internal.h:51:9: error: unknown type name 'proc_write_t'
>>>         51 |         proc_write_t write;
>>>            |         ^~~~~~~~~~~~
>>
>> # CONFIG_PROC_FS is not set in some arch, so we can not directly include the
>> header file.
>> +#include "../fs/proc/internal.h"
>>
>> how about add an extern  ? or do you have other suggest  ?
> 
> Hi, I replied to v5 after the bot reports:
> 
> Sorry, my suggestion (to reuse mem_lseek() from proc) was wrong as the
> kernel test bot just showed us. mem_lseek() may be unavailable without
> CONFIG_PROC_FS.
> The easiest way is to add a page_owner specific lseek function back as in
> the early version, but make it correct for SEEK_CUR. Thanks.
    OK， got this point.
>