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Message-ID: <20160906063826.GG1687@yexl-desktop>
Date:   Tue, 6 Sep 2016 14:38:26 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Jens Axboe <axboe@...com>
Cc:     LKML <linux-kernel@...r.kernel.org>, Jens Axboe <axboe@...com>,
        Jens Axboe <axboe@...nel.dk>, lkp@...org
Subject: [lkp] [blk]  a133ac2428: kernel BUG at block/blk-mq.c:365!


FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git blk-dio
commit a133ac2428bd3dde4e7e17415c1409ce8a3d8468 ("blk-mq: private O_DIRECT implementation")

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 2G

caused below changes:


+----------------------------------------------------------------------------------------+----------+------------+
|                                                                                        | v4.8-rc1 | a133ac2428 |
+----------------------------------------------------------------------------------------+----------+------------+
| boot_successes                                                                         | 3149     | 9          |
| boot_failures                                                                          | 607      | 67         |
| BUG:kernel_early-boot_hang_Unable_to_boot-please_use_a_kernel_appropriate_for_your_CPU | 18       |            |
| WARNING:at_kernel/trace/ftrace.c:#ftrace_bug                                           | 35       |            |
| backtrace:perf_ftrace_event_register                                                   | 29       |            |
| backtrace:perf_trace_init                                                              | 29       |            |
| backtrace:perf_tp_event_init                                                           | 29       |            |
| backtrace:perf_try_init_event                                                          | 29       |            |
| backtrace:perf_event_alloc                                                             | 29       |            |
| backtrace:SyS_perf_event_open                                                          | 29       |            |
| calltrace:SyS_writev                                                                   | 2        |            |
| Mem-Info                                                                               | 41       |            |
| invoked_oom-killer:gfp_mask=0x                                                         | 39       |            |
| BUG:kernel_reboot-without-warning_in_test_stage                                        | 93       | 31         |
| backtrace:do_writev                                                                    | 11       |            |
| backtrace:SyS_writev                                                                   | 11       |            |
| Out_of_memory:Kill_process                                                             | 11       |            |
| calltrace:SyS_fallocate                                                                | 1        |            |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes                       | 13       |            |
| BUG:kernel_early-boot_hang                                                             | 411      |            |
| BUG:kernel_hang_in_early-boot_stage                                                    | 9        |            |
| backtrace:_do_fork                                                                     | 2        |            |
| backtrace:SyS_clone                                                                    | 2        |            |
| backtrace:do_pwritev                                                                   | 3        |            |
| backtrace:SyS_pwritev                                                                  | 3        |            |
| calltrace:SyS_perf_event_open                                                          | 1        |            |
| backtrace:register_ftrace_graph                                                        | 5        |            |
| backtrace:graph_trace_init                                                             | 5        |            |
| backtrace:tracer_init                                                                  | 5        |            |
| backtrace:vfs_write                                                                    | 5        |            |
| backtrace:SyS_write                                                                    | 5        |            |
| BUG:unable_to_handle_kernel                                                            | 2        | 25         |
| Oops                                                                                   | 2        | 25         |
| RIP:__remove_shared_vm_struct                                                          | 2        |            |
| Kernel_panic-not_syncing:Fatal_exception                                               | 2        |            |
| BUG:kernel_test_crashed                                                                | 1        |            |
| calltrace:SyS_pwritev                                                                  | 1        |            |
| calltrace:_do_fork                                                                     | 1        |            |
| general_protection_fault:#[##]SMP                                                      | 0        | 3          |
| RIP:blk_update_request                                                                 | 0        | 20         |
| Kernel_panic-not_syncing:Fatal_exception_in_interrupt                                  | 0        | 36         |
| RIP:__blk_recalc_rq_segments                                                           | 0        | 7          |
| calltrace:SyS_newfstat                                                                 | 0        | 1          |
| kernel_BUG_at_block/blk-mq.c                                                           | 0        | 8          |
| invalid_opcode:#[##]SMP                                                                | 0        | 8          |
| RIP:blk_mq_end_request                                                                 | 0        | 8          |
| calltrace:SyS_read                                                                     | 0        | 7          |
| calltrace:SyS_ioctl                                                                    | 0        | 4          |
| calltrace:SyS_lseek                                                                    | 0        | 1          |
| calltrace:SyS_epoll_wait                                                               | 0        | 3          |
| calltrace:SyS_open                                                                     | 0        | 1          |
| calltrace:SyS_recvmsg                                                                  | 0        | 1          |
| calltrace:SyS_close                                                                    | 0        | 1          |
+----------------------------------------------------------------------------------------+----------+------------+



         Starting Copy rules generated while the root was ro...
         Starting LSB: MD array assembly...
[   57.797519] ------------[ cut here ]------------
[   57.811932] kernel BUG at block/blk-mq.c:365!
[   57.829143] invalid opcode: 0000 [#1] SMP
[   57.842429] Modules linked in:
[   57.855103] CPU: 0 PID: 2081 Comm: mdadm Not tainted 4.8.0-rc1-00001-ga133ac2 #1
[   57.886411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[   57.944546] task: ffff8800690c3300 task.stack: ffff88007ed40000
[   57.965927] RIP: 0010:[<ffffffff814dad39>]  [<ffffffff814dad39>] blk_mq_end_request+0x1e/0x5c
[   57.993930] RSP: 0000:ffff880078803f20  EFLAGS: 00010002
[   58.009261] RAX: 0000000000000001 RBX: ffff88007f960000 RCX: 0000000000000000
[   58.027535] RDX: ffff88007f3c8c00 RSI: 0000000000000000 RDI: 0000000000000000
[   58.045648] RBP: ffff880078803f30 R08: ffff8800502b5500 R09: 0000000000000000
[   58.063764] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   58.081881] R13: ffff88007f960000 R14: ffffffff81eac2a4 R15: 0000000000000000
[   58.099957] FS:  00007f6939c9a700(0000) GS:ffff880078800000(0000) knlGS:0000000000000000
[   58.126694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   58.142670] CR2: 0000000000adebf8 CR3: 000000007ecbb000 CR4: 00000000000006f0
[   58.187522] Stack:
[   58.207772]  ffff88007f960010 ffffffff814d9a0e ffff880078803f40 ffffffff815ddf3f
[   58.249168]  ffff880078803f50 ffffffff814d9a21 ffff880078803f88 ffffffff8116dc5c
[   58.282192]  0000000000000004 00007ffc39b12230 00007ffc39b12370 00000000ffffffff
[   58.311136] Call Trace:
[   58.321182]  <IRQ> 
[   58.324676]  [<ffffffff814d9a0e>] ? __blk_mq_end_request+0x44/0x44
[   58.347431]  [<ffffffff815ddf3f>] virtblk_request_done+0x5e/0x60
[   58.363498]  [<ffffffff814d9a21>] __blk_mq_complete_request_remote+0x13/0x15
[   58.379927]  [<ffffffff8116dc5c>] flush_smp_call_function_queue+0xcd/0x13e
[   58.392306]  [<ffffffff8116e4fd>] generic_smp_call_function_single_interrupt+0x13/0x4a
[   58.414965]  [<ffffffff81079011>] smp_call_function_single_interrupt+0x27/0x35
[   58.448334]  [<ffffffff81ab299c>] call_function_single_interrupt+0x8c/0xa0
[   58.481132]  <EOI> 
[   58.486060] Code: 48 83 c4 28 5b 41 5c 41 5d 41 5e 5d c3 66 66 66 66 90 55 48 89 e5 41 54 53 8b 57 58 48 89 fb 41 89 f4 e8 85 7c ff ff 84 c0 74 02 <0f> 0b 48 89 df e8 86 7f ff ff 48 8b 83 98 01 00 00 48 85 c0 74 
[   58.613383] RIP  [<ffffffff814dad39>] blk_mq_end_request+0x1e/0x5c
[   58.628289]  RSP <ffff880078803f20>
[   58.636807] ---[ end trace 32dcd69f8d2fefb4 ]---
[   58.648181] Kernel panic - not syncing: Fatal exception in interrupt






Thanks,
Xiaolong

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