linux-kernel - Re: [PATCH 5/5] ext4: Add unit test for ext4_mb_mark_diskspace

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Message-ID: <202311260042.kMxL6DnL-lkp@intel.com>
Date:   Sun, 26 Nov 2023 01:34:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kemeng Shi <shikemeng@...weicloud.com>, tytso@....edu,
        adilger.kernel@...ger.ca
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] ext4: Add unit test for ext4_mb_mark_diskspace_used

Hi Kemeng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tytso-ext4/dev]
[also build test WARNING on linus/master v6.7-rc2 next-20231124]
[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/Kemeng-Shi/ext4-Add-unit-test-for-test_free_blocks_simple/20231125-154444
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
patch link:    https://lore.kernel.org/r/20231125154144.3943442-6-shikemeng%40huaweicloud.com
patch subject: [PATCH 5/5] ext4: Add unit test for ext4_mb_mark_diskspace_used
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20231126/202311260042.kMxL6DnL-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231126/202311260042.kMxL6DnL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311260042.kMxL6DnL-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/ext4/mballoc.c:6996:
   fs/ext4/mballoc-test.c:510:16: warning: variable 'max' set but not used [-Wunused-but-set-variable]
           ext4_grpblk_t max;
                         ^
>> fs/ext4/mballoc-test.c:506:13: warning: stack frame size (1036) exceeds limit (1024) in 'test_mark_diskspace_used' [-Wframe-larger-than]
   static void test_mark_diskspace_used(struct kunit *test)
               ^
   39/1036 (3.76%) spills, 997/1036 (96.24%) variables
   2 warnings generated.


vim +/test_mark_diskspace_used +506 fs/ext4/mballoc-test.c

   505	
 > 506	static void test_mark_diskspace_used(struct kunit *test)
   507	{
   508		struct super_block *sb = (struct super_block *)test->priv;
   509		struct inode inode = { .i_sb = sb, };
   510		ext4_grpblk_t max;
   511		struct ext4_allocation_context ac;
   512		struct test_range ranges[TEST_RANGE_COUNT];
   513		int i;
   514	
   515		mbt_generate_test_ranges(sb, ranges, TEST_RANGE_COUNT);
   516	
   517		ac.ac_status = AC_STATUS_FOUND;
   518		ac.ac_sb = sb;
   519		ac.ac_inode = &inode;
   520		max = EXT4_CLUSTERS_PER_GROUP(sb);
   521		for (i = 0; i < TEST_RANGE_COUNT; i++)
   522			test_mark_diskspace_used_range(test, &ac, ranges[i].start,
   523						       ranges[i].len);
   524	}
   525	

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https://github.com/intel/lkp-tests/wiki