FYI, we noticed the following commit:

commit: ddb08a630e369fa2e327ece8e406bcdc3285b064 ("blk-mq-sched: fixes")
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git tmp-sched

in testcase: boot

on test machine: qemu-system-i386 -enable-kvm -cpu Haswell,+smep,+smap -m 360M

caused below changes:


+--------------------------------------------------------------------------------+------------+------------+
|                                                                                | 0443f9bee5 | ddb08a630e |
+--------------------------------------------------------------------------------+------------+------------+
| boot_successes                                                                 | 1          | 2          |
| boot_failures                                                                  | 5          | 70         |
| BUG:kernel_reboot-without-warning_in_test_stage                                | 1          |            |
| BUG:scheduling_while_atomic                                                    | 4          | 70         |
| INFO:suspicious_RCU_usage                                                      | 4          | 70         |
| BUG:unable_to_handle_kernel                                                    | 4          |            |
| Oops:#[##]                                                                     | 4          |            |
| Kernel_panic-not_syncing:Fatal_exception                                       | 4          |            |
| BUG:sleeping_function_called_from_invalid_context_at_kernel/sched/completion.c | 0          | 70         |
| INFO:lockdep_is_turned_off                                                     | 0          | 70         |
+--------------------------------------------------------------------------------+------------+------------+




[    4.956771]  do_int80_syscall_32+0x6d/0x120
[    4.957338]  entry_INT80_32+0x2c/0x2c
[    4.957843] EIP: 0x777151b2
[    4.958228] EFLAGS: 00000246 CPU: 0
[    4.958702] EAX: ffffffda EBX: 776a0b6a ECX: 00000101 EDX: 00000000
[    4.959520] ESI: 55ba8cd0 EDI: 00000014 EBP: 77521b00 ESP: 7fb88224
[    4.960339]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
[    4.961206] BUG: sleeping function called from invalid context at kernel/sched/completion.c:90
[    4.962639] in_atomic(): 1, irqs_disabled(): 0, pid: 142, name: kworker/0:2
[    4.963593] INFO: lockdep is turned off.
[    4.964140] CPU: 0 PID: 142 Comm: kworker/0:2 Tainted: G        W       4.10.0-rc3-00062-gddb08a63 #1
[    4.965442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    4.966784] Workqueue: events_freezable_power_ disk_events_workfn
[    4.967578] Call Trace:
[    4.967919]  dump_stack+0x16/0x22
[    4.968392]  ___might_sleep+0x1f0/0x210
[    4.968925]  __might_sleep+0x85/0xa0


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong