FYI, we noticed the following commit (built with gcc-7):
commit: 7cc93f268e0ea46570963aa6e09c44abe3732efe ("Btrfs: fix deadlock on tree root leaf when finding free extent")
https://github.com/0day-ci/linux UPDATE-20181023-032539/fdmanana-kernel-org/Btrfs-fix-deadlock-on-tree-root-leaf-when-finding-free-extent/20181022-173541
in testcase: xfstests
with following parameters:
disk: 6HDD
fs: btrfs
test: btrfs-group1
test-description: xfstests is a regression test suite for xfs and other files ystems.
test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+--------------------------------------------------------------------------------------+-------+------------+
| | v4.19 | 7cc93f268e |
+--------------------------------------------------------------------------------------+-------+------------+
| boot_successes | 5027 | 6 |
| boot_failures | 1199 | 29 |
| WARNING:stack_recursion | 772 | |
| WARNING:at#for_ip_swapgs_restore_regs_and_return_to_usermode/0x | 687 | |
| cpu_clock_throttled | 83 | |
| WARNING:at#for_ip_interrupt_entry/0x | 96 | |
| WARNING:at_ip_xfs_inode_item_format/0x | 2 | |
| WARNING:at_ip_fsnotify/0x | 82 | |
| WARNING:at_ip__slab_free/0x | 17 | |
| WARNING:at_ip__mutex_lock/0x | 3 | |
| WARNING:at_ip_perf_event_mmap_output/0x | 2 | |
| WARNING:at_ip_native_sched_clock/0x | 5 | |
| WARNING:at_ip_ip_finish_output2/0x | 3 | |
| WARNING:at_drivers/gpu/drm/drm_vblank.c:#drm_wait_one_vblank[drm] | 20 | |
| RIP:drm_wait_one_vblank[drm] | 20 | |
| WARNING:at_ip___perf_sw_event/0x | 4 | |
| PANIC:double_fault | 1 | |
| WARNING:stack_going_in_the_wrong_direction?ip=double_fault/0x | 1 | |
| RIP:error_entry | 1 | |
| stack_segment:#[##] | 2 | |
| RIP:kmem_cache_alloc | 2 | |
| Kernel_panic-not_syncing:Fatal_exception | 4 | 3 |
| general_protection_fault:#[##] | 1 | |
| RIP:__rb_erase_color | 1 | |
| WARNING:at_ip_do_sys_poll/0x | 3 | |
| WARNING:at_ip__netif_receive_skb_core/0x | 1 | |
| WARNING:at_ip__x64_sys_io_submit/0x | 2 | |
| WARNING:at_ip_generic_make_request/0x | 1 | |
| WARNING:at_ip_smp_call_function_single/0x | 5 | |
| WARNING:at_ip_do_filp_open/0x | 1 | |
| WARNING:DIRECTORY_MODE_IS_ENABLED.SOME_ERROR_INJECTIONS_MIGHT_NOT_WORK | 2 | |
| BUG:kernel_hang_in_test_stage | 23 | 2 |
| BUG:soft_lockup-CPU##stuck_for#s | 60 | |
| RIP:simple_write_begin | 1 | |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 60 | |
| BUG:kernel_timeout_in_test_stage | 3 | |
| Assertion_failed | 10 | |
| WARNING:at_fs/xfs/xfs_message.c:#assfail[xfs] | 10 | |
| RIP:assfail[xfs] | 10 | |
| WARNING:at_include/linux/quotaops.h:#dquot_disable | 1 | |
| RIP:dquot_disable | 1 | |
| BUG:unable_to_handle_kernel | 1 | 3 |
| Oops:#[##] | 1 | 3 |
| RIP:raid#_sse21_gen_syndrome[raid#_pq] | 1 | 3 |
| RIP:e1000_xmit_frame | 23 | |
| RIP:_raw_spin_unlock_irqrestore | 19 | |
| RIP:__do_softirq | 7 | |
| RIP:native_safe_halt | 51 | |
| RIP:smp_call_function_single | 11 | |
| RIP:e1000_watchdog | 3 | |
| BUG:kernel_reboot-without-warning_in_test_stage | 2 | |
| RIP:smp_call_function_many | 1 | |
| RIP:e1000_clean | 7 | |
| RIP:_cond_resched | 1 | |
| RIP:e1000_alloc_rx_buffers | 2 | |
| RIP:native_queued_spin_lock_slowpath | 1 | |
| WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 50 | |
| RIP:dev_watchdog | 50 | |
| watchdog:BUG:soft_lockBUG:kernel_hang_in_test_stage | 1 | |
| RIP:__pollwait | 1 | |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks | 1 | |
| RIP:page_remove_rmap | 1 | |
| WARNING:at_fs/btrfs/disk-io.c:#btrfs_free_fs_root[btrfs] | 2 | |
| RIP:btrfs_free_fs_root[btrfs] | 2 | |
| WARNING:at_fs/btrfs/extent-tree.c:#btrfs_put_block_group[btrfs] | 6 | |
| RIP:btrfs_put_block_group[btrfs] | 6 | |
| WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs] | 6 | |
| RIP:btrfs_free_block_groups[btrfs] | 6 | |
| RIP:xfs_trans_committed_bulk[xfs] | 2 | |
| WARNING:at_fs/iomap.c:#iomap_dio_actor | 1 | |
| RIP:iomap_dio_actor | 1 | |
| WARNING:at_arch/x86/kernel/stacktrace.c:#save_stack_trace_user | 20 | |
| RIP:save_stack_trace_user | 20 | |
| RIP:finish_task_switch | 2 | |
| WARNING:at_kernel/trace/ring_buffer.c:#rb_set_head_page | 7 | |
| RIP:rb_set_head_page | 7 | |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h | 40 | |
| invoked_oom-killer:gfp_mask=0x | 120 | |
| Mem-Info | 120 | 1 |
| Out_of_memory:Kill_process | 50 | |
| Out_of_memory_and_no_killable_processes | 66 | |
| Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 66 | |
| WARNING:at_net/wireless/ibss.c:#__cfg80211_ibss_joined[cfg80211] | 5 | |
| RIP:__cfg80211_ibss_joined[cfg80211] | 5 | |
| RIP:copy_user_generic_unrolled | 4 | |
| WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_tx[mac80211_hwsim] | 2 | |
| RIP:mac80211_hwsim_tx[mac80211_hwsim] | 2 | |
| RIP:profile_graph_entry | 1 | |
| WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_roc[mac80211_hwsim] | 2 | |
| RIP:mac80211_hwsim_roc[mac80211_hwsim] | 2 | |
| RIP:copy_user_enhanced_fast_string | 1 | |
| RIP:kvm_sched_clock_read | 1 | |
| WARNING:at_kernel/tracepoint.c:#tracepoint_probe_unregister | 1 | |
| RIP:tracepoint_probe_unregister | 1 | |
| RIP:__put_user_4 | 4 | |
| RIP:native_write_msr | 6 | |
| RIP:tracing_generic_entry_update | 1 | |
| RIP:trace_clock_local | 1 | |
| RIP:do_syscall_64 | 1 | |
| WARNING:at_kernel/trace/trace.c:#trace_buffered_event_disable | 2 | |
| RIP:trace_buffered_event_disable | 2 | |
| WARNING:at_kernel/trace/ftrace.c:#ftrace_bug | 1 | |
| RIP:ftrace_bug | 1 | |
| RIP:ftrace_push_return_trace | 1 | |
| BUG:kernel_in_stage | 16 | |
| End_of_test:RCU_HOTPLUG | 22 | |
| WARNING:at_net/mac80211/tx.c:#__ieee80211_csa_update_counter[mac80211] | 2 | |
| RIP:__ieee80211_csa_update_counter[mac80211] | 2 | |
| RIP:console_unlock | 2 | |
| RIP:exit_to_usermode_loop | 1 | |
| BUG:kernel_hang_in_boot_stage | 1 | |
| WARNING:at_fs/btrfs/transaction.c:#cleanup_transaction[btrfs] | 0 | 23 |
| RIP:cleanup_transaction[btrfs] | 0 | 23 |
+--------------------------------------------------------------------------------------+-------+------------+
[ 1332.863174] WARNING: CPU: 0 PID: 1189 at fs/btrfs/transaction.c:1846 cleanup_transaction+0x20d/0x2f0 [btrfs]
[ 1332.866072] Modules linked in: btrfs xor zstd_decompress zstd_compress xxhash raid6_pq dm_flakey dm_mod sr_mod cdrom sg ppdev snd_pcm ata_generic pata_acpi snd_timer snd soundcore serio_raw pcspkr ata_piix i2c_piix4 libata floppy parport_pc parport ip_tables [last unloaded: xor]
[ 1332.872009] CPU: 0 PID: 1189 Comm: umount Not tainted 4.19.0-00001-g7cc93f2 #1
[ 1332.873963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 1332.876213] RIP: 0010:cleanup_transaction+0x20d/0x2f0 [btrfs]
[ 1332.877678] Code: 59 de bf e1 48 8b 03 48 85 c0 75 e8 65 ff 0d 1a 0a e1 5f e9 59 ff ff ff 89 ce 48 c7 c7 28 20 2a a0 89 4c 24 04 e8 a3 86 e8 e0 <0f> 0b 8b 4c 24 04 e9 73 fe ff ff 48 8b bd 08 03 00 00 be 03 00 00
[ 1332.882362] RSP: 0018:ffffc90003717d10 EFLAGS: 00010286
[ 1332.883732] RAX: 0000000000000000 RBX: ffff88007c227800 RCX: 0000000000000000
[ 1332.885496] RDX: ffff88013fc1ef40 RSI: ffff88013fc16898 RDI: ffff88013fc16898
[ 1332.887229] RBP: ffff88007a9c0000 R08: 0000000000000000 R09: 0000000000000a2b
[ 1332.888995] R10: ffff88007c2272a8 R11: ffffffff82f88fcd R12: ffff8800bb699410
[ 1332.890733] R13: ffff88007c227800 R14: 00000000ffffffe4 R15: ffff88007a9cc900
[ 1332.894990] FS: 00007f9457f672c0(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
[ 1332.897140] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1332.902712] CR2: 000055c8f6d83168 CR3: 000000007bc48000 CR4: 00000000000006f0
[ 1332.904474] Call Trace:
[ 1332.905317] ? finish_wait+0x80/0x80
[ 1332.906376] btrfs_commit_transaction+0x8de/0x940 [btrfs]
[ 1332.907791] ? start_transaction+0x9d/0x3d0 [btrfs]
[ 1332.909132] close_ctree+0x2bc/0x300 [btrfs]
[ 1332.910300] generic_shutdown_super+0x6c/0x120
[ 1332.911526] kill_anon_super+0xe/0x30
[ 1332.912607] btrfs_kill_super+0x13/0x100 [btrfs]
[ 1332.913849] deactivate_locked_super+0x3f/0x70
[ 1332.915085] cleanup_mnt+0x3b/0x80
[ 1332.916082] task_work_run+0xa3/0xe0
[ 1332.917110] exit_to_usermode_loop+0xd3/0xe0
[ 1332.918297] do_syscall_64+0x16c/0x180
[ 1332.919370] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1332.920697] RIP: 0033:0x7f945784bb37
[ 1332.921753] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 03 2b 00 f7 d8 64 89 01 48
[ 1332.926295] RSP: 002b:00007ffd5931fb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 1332.928344] RAX: 0000000000000000 RBX: 000055c8f6d79080 RCX: 00007f945784bb37
[ 1332.930087] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000055c8f6d7c7d0
[ 1332.931850] RBP: 000055c8f6d7c7d0 R08: 00007f9457afcb88 R09: 0000000000000020
[ 1332.933600] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007f9457d4de64
[ 1332.935369] R13: 0000000000000000 R14: 000055c8f6d79260 R15: 00007ffd5931fe20
[ 1332.937120] ---[ end trace ae2f8cd767d9d315 ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
On 05/11/2018 05:50, kernel test robot wrote:
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: 7cc93f268e0ea46570963aa6e09c44abe3732efe ("Btrfs: fix deadlock on tree root leaf when finding free extent")
> https://github.com/0day-ci/linux UPDATE-20181023-032539/fdmanana-kernel-org/Btrfs-fix-deadlock-on-tree-root-leaf-when-finding-free-extent/20181022-173541
Hi,
You are testing an earlier version of the patch that introduced -ENOSPC
errors.
Commit 7cc93f268e0ea46570963aa6e09c44abe3732efe doesn't exist anymore
and got replaced by commit 931e9658e7b52b9e8aacf30e6d7dbfc57b7c67be (the
latest version of the patch without the -ENOSPC regression).
thanks
>
> in testcase: xfstests
> with following parameters:
>
> disk: 6HDD
> fs: btrfs
> test: btrfs-group1
>
> test-description: xfstests is a regression test suite for xfs and other files ystems.
> test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 2 -m 4G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
> +--------------------------------------------------------------------------------------+-------+------------+
> | | v4.19 | 7cc93f268e |
> +--------------------------------------------------------------------------------------+-------+------------+
> | boot_successes | 5027 | 6 |
> | boot_failures | 1199 | 29 |
> | WARNING:stack_recursion | 772 | |
> | WARNING:at#for_ip_swapgs_restore_regs_and_return_to_usermode/0x | 687 | |
> | cpu_clock_throttled | 83 | |
> | WARNING:at#for_ip_interrupt_entry/0x | 96 | |
> | WARNING:at_ip_xfs_inode_item_format/0x | 2 | |
> | WARNING:at_ip_fsnotify/0x | 82 | |
> | WARNING:at_ip__slab_free/0x | 17 | |
> | WARNING:at_ip__mutex_lock/0x | 3 | |
> | WARNING:at_ip_perf_event_mmap_output/0x | 2 | |
> | WARNING:at_ip_native_sched_clock/0x | 5 | |
> | WARNING:at_ip_ip_finish_output2/0x | 3 | |
> | WARNING:at_drivers/gpu/drm/drm_vblank.c:#drm_wait_one_vblank[drm] | 20 | |
> | RIP:drm_wait_one_vblank[drm] | 20 | |
> | WARNING:at_ip___perf_sw_event/0x | 4 | |
> | PANIC:double_fault | 1 | |
> | WARNING:stack_going_in_the_wrong_direction?ip=double_fault/0x | 1 | |
> | RIP:error_entry | 1 | |
> | stack_segment:#[##] | 2 | |
> | RIP:kmem_cache_alloc | 2 | |
> | Kernel_panic-not_syncing:Fatal_exception | 4 | 3 |
> | general_protection_fault:#[##] | 1 | |
> | RIP:__rb_erase_color | 1 | |
> | WARNING:at_ip_do_sys_poll/0x | 3 | |
> | WARNING:at_ip__netif_receive_skb_core/0x | 1 | |
> | WARNING:at_ip__x64_sys_io_submit/0x | 2 | |
> | WARNING:at_ip_generic_make_request/0x | 1 | |
> | WARNING:at_ip_smp_call_function_single/0x | 5 | |
> | WARNING:at_ip_do_filp_open/0x | 1 | |
> | WARNING:DIRECTORY_MODE_IS_ENABLED.SOME_ERROR_INJECTIONS_MIGHT_NOT_WORK | 2 | |
> | BUG:kernel_hang_in_test_stage | 23 | 2 |
> | BUG:soft_lockup-CPU##stuck_for#s | 60 | |
> | RIP:simple_write_begin | 1 | |
> | Kernel_panic-not_syncing:softlockup:hung_tasks | 60 | |
> | BUG:kernel_timeout_in_test_stage | 3 | |
> | Assertion_failed | 10 | |
> | WARNING:at_fs/xfs/xfs_message.c:#assfail[xfs] | 10 | |
> | RIP:assfail[xfs] | 10 | |
> | WARNING:at_include/linux/quotaops.h:#dquot_disable | 1 | |
> | RIP:dquot_disable | 1 | |
> | BUG:unable_to_handle_kernel | 1 | 3 |
> | Oops:#[##] | 1 | 3 |
> | RIP:raid#_sse21_gen_syndrome[raid#_pq] | 1 | 3 |
> | RIP:e1000_xmit_frame | 23 | |
> | RIP:_raw_spin_unlock_irqrestore | 19 | |
> | RIP:__do_softirq | 7 | |
> | RIP:native_safe_halt | 51 | |
> | RIP:smp_call_function_single | 11 | |
> | RIP:e1000_watchdog | 3 | |
> | BUG:kernel_reboot-without-warning_in_test_stage | 2 | |
> | RIP:smp_call_function_many | 1 | |
> | RIP:e1000_clean | 7 | |
> | RIP:_cond_resched | 1 | |
> | RIP:e1000_alloc_rx_buffers | 2 | |
> | RIP:native_queued_spin_lock_slowpath | 1 | |
> | WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 50 | |
> | RIP:dev_watchdog | 50 | |
> | watchdog:BUG:soft_lockBUG:kernel_hang_in_test_stage | 1 | |
> | RIP:__pollwait | 1 | |
> | INFO:rcu_sched_detected_stalls_on_CPUs/tasks | 1 | |
> | RIP:page_remove_rmap | 1 | |
> | WARNING:at_fs/btrfs/disk-io.c:#btrfs_free_fs_root[btrfs] | 2 | |
> | RIP:btrfs_free_fs_root[btrfs] | 2 | |
> | WARNING:at_fs/btrfs/extent-tree.c:#btrfs_put_block_group[btrfs] | 6 | |
> | RIP:btrfs_put_block_group[btrfs] | 6 | |
> | WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs] | 6 | |
> | RIP:btrfs_free_block_groups[btrfs] | 6 | |
> | RIP:xfs_trans_committed_bulk[xfs] | 2 | |
> | WARNING:at_fs/iomap.c:#iomap_dio_actor | 1 | |
> | RIP:iomap_dio_actor | 1 | |
> | WARNING:at_arch/x86/kernel/stacktrace.c:#save_stack_trace_user | 20 | |
> | RIP:save_stack_trace_user | 20 | |
> | RIP:finish_task_switch | 2 | |
> | WARNING:at_kernel/trace/ring_buffer.c:#rb_set_head_page | 7 | |
> | RIP:rb_set_head_page | 7 | |
> | BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h | 40 | |
> | invoked_oom-killer:gfp_mask=0x | 120 | |
> | Mem-Info | 120 | 1 |
> | Out_of_memory:Kill_process | 50 | |
> | Out_of_memory_and_no_killable_processes | 66 | |
> | Kernel_panic-not_syncing:System_is_deadlocked_on_memory | 66 | |
> | WARNING:at_net/wireless/ibss.c:#__cfg80211_ibss_joined[cfg80211] | 5 | |
> | RIP:__cfg80211_ibss_joined[cfg80211] | 5 | |
> | RIP:copy_user_generic_unrolled | 4 | |
> | WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_tx[mac80211_hwsim] | 2 | |
> | RIP:mac80211_hwsim_tx[mac80211_hwsim] | 2 | |
> | RIP:profile_graph_entry | 1 | |
> | WARNING:at_drivers/net/wireless/mac80211_hwsim.c:#mac80211_hwsim_roc[mac80211_hwsim] | 2 | |
> | RIP:mac80211_hwsim_roc[mac80211_hwsim] | 2 | |
> | RIP:copy_user_enhanced_fast_string | 1 | |
> | RIP:kvm_sched_clock_read | 1 | |
> | WARNING:at_kernel/tracepoint.c:#tracepoint_probe_unregister | 1 | |
> | RIP:tracepoint_probe_unregister | 1 | |
> | RIP:__put_user_4 | 4 | |
> | RIP:native_write_msr | 6 | |
> | RIP:tracing_generic_entry_update | 1 | |
> | RIP:trace_clock_local | 1 | |
> | RIP:do_syscall_64 | 1 | |
> | WARNING:at_kernel/trace/trace.c:#trace_buffered_event_disable | 2 | |
> | RIP:trace_buffered_event_disable | 2 | |
> | WARNING:at_kernel/trace/ftrace.c:#ftrace_bug | 1 | |
> | RIP:ftrace_bug | 1 | |
> | RIP:ftrace_push_return_trace | 1 | |
> | BUG:kernel_in_stage | 16 | |
> | End_of_test:RCU_HOTPLUG | 22 | |
> | WARNING:at_net/mac80211/tx.c:#__ieee80211_csa_update_counter[mac80211] | 2 | |
> | RIP:__ieee80211_csa_update_counter[mac80211] | 2 | |
> | RIP:console_unlock | 2 | |
> | RIP:exit_to_usermode_loop | 1 | |
> | BUG:kernel_hang_in_boot_stage | 1 | |
> | WARNING:at_fs/btrfs/transaction.c:#cleanup_transaction[btrfs] | 0 | 23 |
> | RIP:cleanup_transaction[btrfs] | 0 | 23 |
> +--------------------------------------------------------------------------------------+-------+------------+
>
>
>
> [ 1332.863174] WARNING: CPU: 0 PID: 1189 at fs/btrfs/transaction.c:1846 cleanup_transaction+0x20d/0x2f0 [btrfs]
> [ 1332.866072] Modules linked in: btrfs xor zstd_decompress zstd_compress xxhash raid6_pq dm_flakey dm_mod sr_mod cdrom sg ppdev snd_pcm ata_generic pata_acpi snd_timer snd soundcore serio_raw pcspkr ata_piix i2c_piix4 libata floppy parport_pc parport ip_tables [last unloaded: xor]
> [ 1332.872009] CPU: 0 PID: 1189 Comm: umount Not tainted 4.19.0-00001-g7cc93f2 #1
> [ 1332.873963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
> [ 1332.876213] RIP: 0010:cleanup_transaction+0x20d/0x2f0 [btrfs]
> [ 1332.877678] Code: 59 de bf e1 48 8b 03 48 85 c0 75 e8 65 ff 0d 1a 0a e1 5f e9 59 ff ff ff 89 ce 48 c7 c7 28 20 2a a0 89 4c 24 04 e8 a3 86 e8 e0 <0f> 0b 8b 4c 24 04 e9 73 fe ff ff 48 8b bd 08 03 00 00 be 03 00 00
> [ 1332.882362] RSP: 0018:ffffc90003717d10 EFLAGS: 00010286
> [ 1332.883732] RAX: 0000000000000000 RBX: ffff88007c227800 RCX: 0000000000000000
> [ 1332.885496] RDX: ffff88013fc1ef40 RSI: ffff88013fc16898 RDI: ffff88013fc16898
> [ 1332.887229] RBP: ffff88007a9c0000 R08: 0000000000000000 R09: 0000000000000a2b
> [ 1332.888995] R10: ffff88007c2272a8 R11: ffffffff82f88fcd R12: ffff8800bb699410
> [ 1332.890733] R13: ffff88007c227800 R14: 00000000ffffffe4 R15: ffff88007a9cc900
> [ 1332.894990] FS: 00007f9457f672c0(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
> [ 1332.897140] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 1332.902712] CR2: 000055c8f6d83168 CR3: 000000007bc48000 CR4: 00000000000006f0
> [ 1332.904474] Call Trace:
> [ 1332.905317] ? finish_wait+0x80/0x80
> [ 1332.906376] btrfs_commit_transaction+0x8de/0x940 [btrfs]
> [ 1332.907791] ? start_transaction+0x9d/0x3d0 [btrfs]
> [ 1332.909132] close_ctree+0x2bc/0x300 [btrfs]
> [ 1332.910300] generic_shutdown_super+0x6c/0x120
> [ 1332.911526] kill_anon_super+0xe/0x30
> [ 1332.912607] btrfs_kill_super+0x13/0x100 [btrfs]
> [ 1332.913849] deactivate_locked_super+0x3f/0x70
> [ 1332.915085] cleanup_mnt+0x3b/0x80
> [ 1332.916082] task_work_run+0xa3/0xe0
> [ 1332.917110] exit_to_usermode_loop+0xd3/0xe0
> [ 1332.918297] do_syscall_64+0x16c/0x180
> [ 1332.919370] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 1332.920697] RIP: 0033:0x7f945784bb37
> [ 1332.921753] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 03 2b 00 f7 d8 64 89 01 48
> [ 1332.926295] RSP: 002b:00007ffd5931fb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
> [ 1332.928344] RAX: 0000000000000000 RBX: 000055c8f6d79080 RCX: 00007f945784bb37
> [ 1332.930087] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000055c8f6d7c7d0
> [ 1332.931850] RBP: 000055c8f6d7c7d0 R08: 00007f9457afcb88 R09: 0000000000000020
> [ 1332.933600] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007f9457d4de64
> [ 1332.935369] R13: 0000000000000000 R14: 000055c8f6d79260 R15: 00007ffd5931fe20
> [ 1332.937120] ---[ end trace ae2f8cd767d9d315 ]---
>
>
> To reproduce:
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
>
>
>
> Thanks,
> Rong Chen
>