Hi Sergey,
FYI here is another bisect result. The attached reproduce-* script may
help reproduce the bug.
https://github.com/0day-ci/linux/commits/Sergey-Senozhatsky/printk-introd...
commit fbc14616f483788afabe77d05bfb99883dc66c73
Author: Sergey Senozhatsky <sergey.senozhatsky(a)gmail.com>
AuthorDate: Wed Mar 29 18:25:11 2017 +0900
Commit: 0day robot <fengguang.wu(a)intel.com>
CommitDate: Thu Mar 30 18:58:09 2017 +0800
printk: enable printk offloading
Initialize the kernel printing thread and enable printk()
offloading.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky(a)gmail.com>
fd8b6b120c printk: add printk emergency_mode parameter
fbc14616f4 printk: enable printk offloading
fbc14616f4 printk: enable printk offloading
+-------------------------------------------------+------------+------------+------------+
| | fd8b6b120c | fbc14616f4 | fbc14616f4
|
+-------------------------------------------------+------------+------------+------------+
| boot_successes | 96 | 22 | 22
|
| boot_failures | 0 | 13 | 13
|
| BUG:kernel_reboot-without-warning_in_test_stage | 0 | 13 | 13
|
+-------------------------------------------------+------------+------------+------------+
Kernel tests: Boot OK!
[ 125.982508] Writes: Total: 2 Max/Min: 0/0 Fail: 0
[ 150.299255] Unregister pv shared memory for cpu 0
# HH:MM RESULT GOOD BAD
GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 5809b48649bea3a3a6511b4393e2c73a670f7ad4
8f8ab14f4414e1be0e7c23036017e3e3130ba7cd --
git bisect good a8cd38c6c0b0a1543ab81ca37c740f4f86f085dc # 21:29 G 26 0 0 0
Merge 'hid/for-next' into devel-catchup-201703302001
git bisect bad d7261f07e7035243f09cb825895e8a6dcafe579c # 21:44 B 13 4 0 0
Merge
'linux-review/Sergey-Senozhatsky/printk-introduce-printing-kernel-thread/20170330-185752'
into devel-catchup-201703302001
git bisect good 9dad6e22e1870cc1c426a374f5147c9374500dd7 # 10:28 G 30 0 0 0
Merge 'bpf/prog_test_run' into devel-catchup-201703302001
git bisect good 4fdb81c8aab9ba0d74fe86522f6def11d9ded0f1 # 10:40 G 31 0 0 0
Merge
'linux-review/Jan-Burgmeier/Fix-IB-va_start-ib_bytes-range-check-on-32Bit-systems/20170330-175723'
into devel-catchup-201703302001
git bisect good da72040c4b25c8f8f0dfac045439da76983aea9c # 10:57 G 31 0 0 0
Merge
'linux-review/Alexey-Klimov/firmware-arm_scpi-reinit-completion-instead-of-full-init_completion/20170330-180533'
into devel-catchup-201703302001
git bisect good 628e57e7b97e3f31e72917790122b0ef982e82c9 # 11:13 G 32 0 0 0
Merge
'linux-review/Shanker-Donthineni/ACPI-Update-platform-device-numa-node-based-on-_PXM-method/20170330-190738'
into devel-catchup-201703302001
git bisect good 71b4c01c71544ce4e60ad2d2b97be5a2c9573d06 # 11:29 G 31 0 0 0
pm: switch to printk.emergency mode in unsafe places
git bisect good 2ddfa6a93b77983c93cb47c75f555b6b420ec8f7 # 00:30 G 32 0 0 0
kexec: switch to printk.emergency mode in unsafe places
git bisect bad fbc14616f483788afabe77d05bfb99883dc66c73 # 00:46 B 14 6 0 1
printk: enable printk offloading
git bisect good fd8b6b120c9cc25f3d080388d47a3ea531389c64 # 01:02 G 30 0 0 0
printk: add printk emergency_mode parameter
# first bad commit: [fbc14616f483788afabe77d05bfb99883dc66c73] printk: enable printk
offloading
git bisect good fd8b6b120c9cc25f3d080388d47a3ea531389c64 # 01:19 G 92 0 0 0
printk: add printk emergency_mode parameter
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad fbc14616f483788afabe77d05bfb99883dc66c73 # 01:33 B 16 4 0 0
printk: enable printk offloading
# extra tests on HEAD of linux-devel/devel-catchup-201703302001
git bisect bad 5809b48649bea3a3a6511b4393e2c73a670f7ad4 # 01:39 B 9 3 0 2
0day head guard for 'devel-catchup-201703302001'
# extra tests on tree/branch
linux-review/Sergey-Senozhatsky/printk-introduce-printing-kernel-thread/20170330-185752
git bisect bad fbc14616f483788afabe77d05bfb99883dc66c73 # 01:42 B 20 13 0 0
printk: enable printk offloading
# extra tests with first bad commit reverted
git bisect good ad729515c32be2b77245ca5889bd079892b09324 # 02:03 G 33 0 0 0
Revert "printk: enable printk offloading"
---
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