FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs dev-test
commit b9d777b85ff1ff79a1173190317b25bebc404ab4 ("f2fs: check inline_data flag at converting time")


=========================================================================================
compiler/disk/filesize/fs/iterations/kconfig/nr_directories/nr_files_per_directory/nr_threads/rootfs/sync_method/tbox_group/test_size/testcase:
  gcc-4.9/1HDD/16MB/f2fs/1x/x86_64-rhel/16d/256fpd/32t/debian-x86_64-2015-02-07.cgz/NoSync/nhm4/60G/fsmark

commit: 
  74fd8d9927ef08db30a85f131a124152aeba66c7
  b9d777b85ff1ff79a1173190317b25bebc404ab4

74fd8d9927ef08db b9d777b85ff1ff79a117319031 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
     10.00 ±  0%     -10.0%       9.00 ±  0%  fsmark.time.percent_of_cpu_this_job_got
     10.00 ±  0%     -10.0%       9.00 ±  0%  time.percent_of_cpu_this_job_got
      2.35 ±  0%      -3.7%       2.26 ±  0%  turbostat.%Busy
     67.30 ±  0%      -4.5%      64.30 ±  0%  turbostat.Avg_MHz
      2116 ±  1%     -98.7%      27.20 ±110%  proc-vmstat.kswapd_inodesteal
    191431 ±  0%     +18.2%     226316 ±  0%  proc-vmstat.slabs_scanned
     56566 ±  0%     +21.3%      68612 ±  0%  proc-vmstat.workingset_nodereclaim
   1176917 ±  2%    -100.0%       0.00 ± -1%  latency_stats.avg.call_rwsem_down_read_failed.f2fs_convert_inline_inode.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
     62312 ± 55%   +1577.8%    1045503 ± 11%  latency_stats.avg.call_rwsem_down_read_failed.f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
     11969 ±  8%    -100.0%       0.00 ± -1%  latency_stats.hits.call_rwsem_down_read_failed.get_node_info.[f2fs].read_node_page.[f2fs].get_node_page.[f2fs].f2fs_convert_inline_inode.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write
   1773702 ±  7%    -100.0%       0.00 ± -1%  latency_stats.max.call_rwsem_down_read_failed.f2fs_convert_inline_inode.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
 3.041e+08 ±  2%    -100.0%       0.00 ± -1%  latency_stats.sum.call_rwsem_down_read_failed.f2fs_convert_inline_inode.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
    163413 ±112%    +165.9%     434477 ±147%  latency_stats.sum.call_rwsem_down_read_failed.f2fs_wait_on_page_writeback.[f2fs].f2fs_wait_on_page_writeback.[f2fs].get_dnode_of_data.[f2fs].f2fs_reserve_block.[f2fs].f2fs_get_block.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write
    788095 ±164%     -60.4%     312194 ±122%  latency_stats.sum.call_rwsem_down_read_failed.f2fs_wait_on_page_writeback.[f2fs].f2fs_wait_on_page_writeback.[f2fs].update_inode.[f2fs].sync_inode_page.[f2fs].reserve_new_block.[f2fs].f2fs_reserve_block.[f2fs].f2fs_get_block.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter
   1743538 ± 56%  +18023.3%   3.16e+08 ±  3%  latency_stats.sum.call_rwsem_down_read_failed.f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
   1677147 ±  9%    -100.0%       0.00 ± -1%  latency_stats.sum.call_rwsem_down_read_failed.get_node_info.[f2fs].read_node_page.[f2fs].get_node_page.[f2fs].f2fs_convert_inline_inode.[f2fs].f2fs_write_begin.[f2fs].generic_perform_write.__generic_file_write_iter.generic_file_write_iter.f2fs_file_write_iter.[f2fs].__vfs_write.vfs_write


nhm4: Nehalem
Memory: 4G

To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml


Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


Thanks,
Ying Huang