Hi Tejun,

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata for-3.18-fixes
commit 61e268068c92ed000f078dc1ab71d1228439fecd ("Revert "AHCI: Optimize single IRQ interrupt processing"")

+-----------------------------------------------------------+------------+------------+
|                                                           | aa1cf25887 | 61e268068c |
+-----------------------------------------------------------+------------+------------+
| boot_successes                                            | 35         | 4          |
| early-boot-hang                                           | 1          |            |
| boot_failures                                             | 0          | 8          |
| metadata_I/O_error:block#("xlog_iodone")error#numblks     | 0          | 8          |
| XFS(sda3):Log_I/O_Error_Detected.Shutting_down_filesystem | 0          | 8          |
| Please_umount_the_filesystem_and_rectify_the_problem(s)   | 0          | 8          |
+-----------------------------------------------------------+------------+------------+


[   24.322655] sd 2:0:0:0: [sda] CDB: 
[   24.322657] Write(10): 2a 00 27 b5 22 10 00 00 10 00
[   24.322659] ata2: EH complete
[   24.322672] XFS (sda3): metadata I/O error: block 0x941ce20 ("xlog_iodone") error 5 numblks 64
[   24.322674] XFS (sda3): xfs_do_force_shutdown(0x2) called from line 1181 of file fs/xfs/xfs_log.c.  Return address = 0xffffffff81356796
[   24.322710] XFS (sda3): Log I/O Error Detected.  Shutting down filesystem
[   24.322710] XFS (sda3): Please umount the filesystem and rectify the problem(s)
[   24.322716] Buffer I/O error on device sda3, logical block 19432150
[   24.322716] lost page write due to I/O error on sda3
[   24.322720] Buffer I/O error on device sda3, logical block 19432151

To reproduce:

        apt-get install ruby ruby-oj
        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/setup-local job.yaml # the job file attached in this email
        bin/run-local   job.yaml

testbox/testcase/testparams: lkp-ne04/fsmark/performance-1x-32t-1HDD-xfs-5K-400M-fsyncBeforeClose-16d-256fpd

aa1cf25887099bba  61e268068c92ed000f078dc1ab
----------------  --------------------------
           :15          20%           1:5     last_state.is_incomplete_run
           :15          20%           1:5     last_state.booting
           :15          80%           4:5     dmesg.Please_umount_the_filesystem_and_rectify_the_problem(s)
           :15          80%           4:5     dmesg.XFS(sda3):Log_I/O_Error_Detected.Shutting_down_filesystem
           :15          80%           4:5     dmesg.metadata_I/O_error:block#("xlog_iodone")error#numblks

testbox/testcase/testparams: lkp-ne04/fsmark/performance-1x-32t-1HDD-xfs-8K-400M-fsyncBeforeClose-16d-256fpd

aa1cf25887099bba  61e268068c92ed000f078dc1ab
----------------  --------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :10          80%           4:5     dmesg.Please_umount_the_filesystem_and_rectify_the_problem(s)
           :10          80%           4:5     dmesg.XFS(sda3):Log_I/O_Error_Detected.Shutting_down_filesystem
           :10          80%           4:5     dmesg.metadata_I/O_error:block#("xlog_iodone")error#numblks
           :10          80%           4:5     stderr.fopen_failed_to_open:fs_log.txt
           :10          80%           4:5     stderr.fs_mark:fsync_failed_Input/output_error

Thanks,
Fengguang