linux-ext4 - Re: [PATCH v3 14/15] samples: Add fs error monitoring example

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Date:   Fri, 23 Jul 2021 09:35:49 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     Gabriel Krisman Bertazi <krisman@...labora.com>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        kernel test robot <lkp@...el.com>, amir73il@...il.com,
        kbuild-all@...ts.01.org, djwong@...nel.org, tytso@....edu,
        david@...morbit.com, jack@...e.com, dhowells@...hat.com,
        khazhy@...gle.com, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v3 14/15] samples: Add fs error monitoring example



On 7/23/2021 12:15 AM, Gabriel Krisman Bertazi wrote:
> "Chen, Rong A" <rong.a.chen@...el.com> writes:
> 
>> Hi Gabriel,
>>
>> On 7/21/2021 3:49 AM, Dan Carpenter wrote:
>>> On Mon, Jul 19, 2021 at 10:36:54AM -0400, Gabriel Krisman Bertazi
>>> wrote:
>>>> kernel test robot <lkp@...el.com> writes:
>>>>
>>>>> Hi Gabriel,
>>>>>
>>>>> I love your patch! Yet something to improve:
>>>>>
>>>>> [auto build test ERROR on ext3/fsnotify]
>>>>> [also build test ERROR on ext4/dev linus/master v5.13 next-20210629]
>>>>> [cannot apply to tytso-fscrypt/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/Gabriel-Krisman-Bertazi/File-system-wide-monitoring/20210630-031347
>>>>> base:   https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git  fsnotify
>>>>> config: arm64-allyesconfig (attached as .config)
>>>>> compiler: aarch64-linux-gcc (GCC) 9.3.0
>>>>> 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/746524d8db08a041fed90e41b15c8e8ca69cb22d
>>>>>           git remote add linux-review https://github.com/0day-ci/linux
>>>>>           git fetch --no-tags linux-review Gabriel-Krisman-Bertazi/File-system-wide-monitoring/20210630-031347
>>>>>           git checkout 746524d8db08a041fed90e41b15c8e8ca69cb22d
>>>>>           # save the attached .config to linux build tree
>>>>>           mkdir build_dir
>>>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash samples/
>>>>>
>>>>> 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 >>):
>>>>>
>>>>>>> samples/fanotify/fs-monitor.c:7:10: fatal error: errno.h: No such file or directory
>>>>>          7 | #include <errno.h>
>>>>>            |          ^~~~~~~~~
>>>>>      compilation terminated.
>>>>
>>>> Hi Dan,
>>>>
>>>> I'm not sure what's the proper fix here.  Looks like 0day is not using
>>>> cross system libraries when building this user space code.  Should I do
>>>> something special to silent it?
>>
>> It seems need extra libraries for arm64, we'll disable CONFIG_SAMPLES to
>> avoid reporting this error.
> 
> There are kernel space code in samples/ that still benefit from the test
> robot. See ftrace/ftrace-direct-too.c for one instance.
> 
> Perhaps it can be disabled just for userprogs-* Makefile entries in
> samples/ ?
> 

we'll still test samples on arch x86_64, is there a simple way to 
disable userprogs-* cases? we don't want to edit kernel code.

Best Regards,
Rong Chen