Ext4 kernel task timeout

Since a few days i see the following messages (below) occur at the console with one of our test devices with a image based on Toradex BSP 2.7.2. What are possible consequences of this kind of messages and is this related to software or possible eMMC corruptions?

root@colibri-imx6:/# ./[68766.714500] INFO: task scp:2389 blocked for more than                                                                                                                                                              10 seconds.
[68766.720673]       Not tainted 4.1.39-00006-gb0ac7a0-dirty #3
[68766.726486] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this                                                                                                                                                              message.
[68766.734467] scp             D 8067844c     0  2389   2386 0x00000000
[68766.740913] Backtrace:
[68766.743438] [<80678280>] (__schedule) from [<80678820>] (schedule+0x44/0x9c)
[68766.750576]  r10:866e8400 r9:808de100 r8:80679160 r7:00000002 r6:7fffffff r5:                                                                                                                                                             00000000
[68766.758627]  r4:86b46000
[68766.761230] [<806787dc>] (schedule) from [<8067b37c>] (schedule_timeout+0x150                                                                                                                                                             /0x190)
[68766.769078]  r5:00000000 r4:7fffffff
[68766.772747] [<8067b22c>] (schedule_timeout) from [<80678248>] (io_schedule_ti                                                                                                                                                             meout+0x80/0xb8)
[68766.781382]  r9:808de100 r8:80679160 r7:00000002 r6:7fffffff r5:00000000 r4:9                                                                                                                                                             fb21c28
[68766.789344] [<806781c8>] (io_schedule_timeout) from [<806791a0>] (bit_wait_io                                                                                                                                                             +0x40/0x64)
[68766.797536]  r7:00000002 r6:9fb56154 r5:86b47d34 r4:86b47d28
[68766.803399] [<80679160>] (bit_wait_io) from [<80678cd4>] (__wait_on_bit+0x84/                                                                                                                                                             0xb8)
[68766.811099] [<80678c50>] (__wait_on_bit) from [<80678dd4>] (out_of_line_wait_                                                                                                                                                             on_bit+0xcc/0xd4)
[68766.819839]  r9:808de100 r8:00000002 r7:80679160 r6:00000019 r5:84034080 r4:9                                                                                                                                                             fb56154
[68766.827822] [<80678d08>] (out_of_line_wait_on_bit) from [<801a11e0>] (do_get_                                                                                                                                                             write_access+0x27c/0x3f8)
[68766.837247]  r8:8465cf00 r7:8418ce40 r6:846b9280 r5:00000000 r4:84034080
[68766.844121] [<801a0f64>] (do_get_write_access) from [<801a1388>] (jbd2_journa                                                                                                                                                             l_get_write_access+0x2c/0x40)
[68766.853904]  r10:00000000 r9:847bdda8 r8:8465cf00 r7:00000b31 r6:8068c45c r5:                                                                                                                                                             8465cf00
[68766.861966]  r4:846b9280
[68766.864626] [<801a135c>] (jbd2_journal_get_write_access) from [<801882cc>] (_                                                                                                                                                             _ext4_journal_get_write_access+0x3c/0x78)
[68766.875458]  r5:84034080 r4:8465cf00
[68766.879138] [<80188290>] (__ext4_journal_get_write_access) from [<80170fec>]                                                                                                                                                              (ext4_orphan_add+0xa0/0x204)
[68766.888809]  r7:866f7800 r6:00000000 r5:866f7c00 r4:847bdde8
[68766.894675] [<80170f4c>] (ext4_orphan_add) from [<801682bc>] (ext4_truncate+0                                                                                                                                                             x1a4/0x360)
[68766.902825]  r10:00000000 r9:00000000 r8:00000200 r7:00000000 r6:000003ff r5:                                                                                                                                                             8465cf00
[68766.910865]  r4:847bdde8
[68766.913470] [<80168118>] (ext4_truncate) from [<80169d5c>] (ext4_setattr+0x45                                                                                                                                                             4/0x660)
[68766.921415]  r9:00000000 r8:01758e00 r7:00002068 r6:00000000 r5:86b47ef8 r4:8                                                                                                                                                             47bdde8
[68766.929393] [<80169908>] (ext4_setattr) from [<8010d76c>] (notify_change+0x16                                                                                                                                                             c/0x334)
[68766.937362]  r10:00000000 r9:000081a4 r8:847d1908 r7:86b47ec0 r6:86b47ef8 r5:                                                                                                                                                             847bdde8
[68766.945422]  r4:00002068
[68766.948060] [<8010d600>] (notify_change) from [<800f0cac>] (do_truncate+0x84/                                                                                                                                                             0xa8)
[68766.955799]  r10:847d1908 r9:847bdde8 r8:00000000 r7:00000000 r6:01758e00 r5:                                                                                                                                                             86b87b40
[68766.963813]  r4:847d1908
[68766.966471] [<800f0c28>] (do_truncate) from [<800f1090>] (do_sys_ftruncate+0x                                                                                                                                                             120/0x198)
[68766.974609]  r7:00000000 r6:01758e00 r5:86b87b40 r4:86b87b40
[68766.980429] [<800f0f70>] (do_sys_ftruncate) from [<800f1180>] (SyS_ftruncate6                                                                                                                                                             4+0x1c/0x24)
[68766.988709]  r10:00000000 r9:86b46000 r8:8000fa04 r7:000000c2 r6:54b7018d r5:                                                                                                                                                             7ef7c8e0
[68766.996764]  r4:00000e00
[68766.999371] [<800f1164>] (SyS_ftruncate64) from [<8000f860>] (ret_fast_syscal                                                                                                                                                             l+0x0/0x3c)

Sorry, I just stumbled over this ticket. Are you still seeing this?

I guess it could be related to mounting the rootfs as ext3 vs. ext4. Could you please post a full serial debug UART_A boot log for us to analyse what exactly is going on?