[Bug 95166] [KBL] Suspend to disk does work after several iterations

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95166

--- Comment #1 from cprigent <christophe.prigent at intel.com> ---
Created attachment 123303
  --> https://bugs.freedesktop.org/attachment.cgi?id=123303&action=edit
logs.jpg

I launched 50 loops of each test modes of hibernation:

Freezer mode:
It returned 3 times "write error: Device or resource busy"
Apr 27 10:10:42 KBLU1 kernel: [  693.773538] Freezing user space processes ...
Apr 27 10:10:42 KBLU1 kernel: [  713.776165] Freezing of tasks failed after
20.001 seconds (1 tasks refusing to freeze, wq_busy=0):
Apr 27 10:10:42 KBLU1 kernel: [  713.776323] fstrim          D ffff8801ded4faa8
    0  3757   3756 0x00080004
Apr 27 10:10:42 KBLU1 kernel: [  713.776334]  ffff8801ded4faa8 00000000fffffffb
ffff8801e6373c80 ffff8801dfda1e40
Apr 27 10:10:42 KBLU1 kernel: [  713.776341]  ffff8801ded50000 ffff8801edcd6d00
7fffffffffffffff ffff8801dfda1e40
Apr 27 10:10:42 KBLU1 kernel: [  713.776347]  0000000016200000 ffff8801ded4fac0
ffffffff81795b25 0000000000000000
Apr 27 10:10:42 KBLU1 kernel: [  713.776353] Call Trace:
Apr 27 10:10:42 KBLU1 kernel: [  713.776367]  [<ffffffff81795b25>]
schedule+0x35/0x80
Apr 27 10:10:42 KBLU1 kernel: [  713.776375]  [<ffffffff8179895f>]
schedule_timeout+0x1af/0x260
Apr 27 10:10:42 KBLU1 kernel: [  713.776385]  [<ffffffff810ebffc>] ?
ktime_get+0x3c/0xb0
Apr 27 10:10:42 KBLU1 kernel: [  713.776390]  [<ffffffff817950a4>]
io_schedule_timeout+0xa4/0x110
Apr 27 10:10:42 KBLU1 kernel: [  713.776397]  [<ffffffff81796eb4>]
wait_for_completion_io+0xa4/0x110
Apr 27 10:10:42 KBLU1 kernel: [  713.776403]  [<ffffffff810a27e0>] ?
wake_up_q+0x70/0x70
Apr 27 10:10:42 KBLU1 kernel: [  713.776412]  [<ffffffff81389d10>]
blkdev_issue_discard+0x1e0/0x230
Apr 27 10:10:42 KBLU1 kernel: [  713.776419]  [<ffffffff812bd169>]
ext4_trim_fs+0x489/0x9e0
Apr 27 10:10:42 KBLU1 kernel: [  713.776427]  [<ffffffff8128a329>]
ext4_ioctl+0xc59/0x1300
Apr 27 10:10:42 KBLU1 kernel: [  713.776436]  [<ffffffff8120ea92>]
do_vfs_ioctl+0x92/0x580
Apr 27 10:10:42 KBLU1 kernel: [  713.776444]  [<ffffffff812009f5>] ?
SYSC_newfstat+0x25/0x30
Apr 27 10:10:42 KBLU1 kernel: [  713.776451]  [<ffffffff8120eff9>]
SyS_ioctl+0x79/0x90
Apr 27 10:10:42 KBLU1 kernel: [  713.776458]  [<ffffffff81003cc9>]
do_syscall_64+0x69/0x110
Apr 27 10:10:42 KBLU1 kernel: [  713.776466]  [<ffffffff81799ba5>]
entry_SYSCALL64_slow_path+0x25/0x25
Apr 27 10:10:42 KBLU1 kernel: [  713.776472]

Devices, Platform, Processors, Core modes: 50 with success and without error.

Then the 1rst normal suspend to disk caused a crashed.
I attach "test-mode-of-hibernation_kern.log.tar.gz" and logs.jpg (we see more
logs in the screen than in kern.log)

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