FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a ("xfs: don't zero partial page cache pages during O_DIRECT writes")


+--------------------------------------------------------+------------+------------+
|                                                        | 85e584da32 | 834ffca6f7 |
+--------------------------------------------------------+------------+------------+
| boot_successes                                         | 85         | 10         |
| boot_failures                                          | 2          | 120        |
| BUG:kernel_test_crashed                                | 2          |            |
| WARNING:at_fs/xfs/xfs_file.c:#xfs_file_dio_aio_write() | 0          | 120        |
| backtrace:vfs_write                                    | 0          | 120        |
| backtrace:SyS_write                                    | 0          | 120        |
+--------------------------------------------------------+------------+------------+


[  354.728419] XFS (vda): Unmounting Filesystem
[  355.133977] XFS (vda): Mounting V4 Filesystem
[  355.174239] XFS (vda): Ending clean mount
[  362.820417] WARNING: CPU: 3 PID: 23390 at fs/xfs/xfs_file.c:700 xfs_file_dio_aio_write+0x27c/0x2e0()
[  362.822109] Modules linked in: ipmi_watchdog ipmi_msghandler sg sr_mod cdrom ata_generic pata_acpi cirrus syscopyarea sysfillrect sysimgblt ppdev ttm ata_piix snd_pcm snd_timer drm_kms_helper libata snd microcode drm soundcore pcspkr floppy serio_raw i2c_piix4 parport_pc parport acpi_cpufreq
[  362.828207] CPU: 3 PID: 23390 Comm: dd Not tainted 4.0.0-rc3-next-20150311 #1
[  362.829908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[  362.831853]  ffffffff81bb5940 ffff88007d5c3d08 ffffffff818b19e6 ffff880077f901f8
[  362.833873]  0000000000000000 ffff88007d5c3d48 ffffffff8107294a ffffea00010cc240
[  362.835646]  ffff8800570f7400 ffff8800570f75d0 0000000000000000 ffff8800570f7720
[  362.837330] Call Trace:
[  362.838593]  [<ffffffff818b19e6>] dump_stack+0x4c/0x65
[  362.840023]  [<ffffffff8107294a>] warn_slowpath_common+0x8a/0xc0
[  362.841652]  [<ffffffff81072a3a>] warn_slowpath_null+0x1a/0x20
[  362.843125]  [<ffffffff8134b75c>] xfs_file_dio_aio_write+0x27c/0x2e0
[  362.844694]  [<ffffffff8134bb20>] xfs_file_write_iter+0x110/0x130
[  362.846229]  [<ffffffff811e8861>] new_sync_write+0x81/0xb0
[  362.847670]  [<ffffffff811e9057>] vfs_write+0xb7/0x1f0
[  362.849152]  [<ffffffff811e9b6e>] ? vfs_read+0x11e/0x140
[  362.850573]  [<ffffffff811e9c86>] SyS_write+0x46/0xb0
[  362.852055]  [<ffffffff818b9e50>] system_call_fastpath+0x12/0x17
[  362.853576] ---[ end trace 002c13cd5d358e1d ]---


Thanks,
Ying Huang