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Date: Sun, 20 Sep 2015 16:51:28 +0800
From: kernel test robot <ying.huang@...el.com>
TO: Andy Lutomirski <luto@...nel.org>
CC: LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [x86/dumpstack] 8ba848287b: BUG: scheduling while atomic: swapper/0/0/0x00000002
FYI, we noticed the below changes on
git://internal_merge_and_test_tree revert-8ba848287b7a408b280e30beea9a29d1297662a5-8ba848287b7a408b280e30beea9a29d1297662a5
commit 8ba848287b7a408b280e30beea9a29d1297662a5 ("x86/dumpstack: Show top of special stack if we OOPS on a special stack")
+------------------------------------------------------------------------------+------------+------------+
| | 0de0ad4a15 | 8ba848287b |
+------------------------------------------------------------------------------+------------+------------+
| boot_successes | 11 | 11 |
| boot_failures | 20 | 19 |
| INFO:task_blocked_for_more_than#seconds | 18 | 18 |
| RIP:delay_tsc | 2 | 1 |
| RIP:flat_send_IPI_mask | 18 | 5 |
| Kernel_panic-not_syncing:hung_task:blocked_tasks | 18 | 4 |
| backtrace:vfs_write | 16 | 15 |
| backtrace:SyS_write | 16 | 15 |
| backtrace:vfs_read | 4 | 1 |
| backtrace:SyS_read | 4 | 1 |
| backtrace:watchdog | 18 | 4 |
| RIP:update_cfs_shares | 1 | |
| backtrace:cpu_startup_entry | 8 | 7 |
| RIP:__schedule | 1 | |
| RIP:native_safe_halt | 5 | 2 |
| RIP:irq_exit | 1 | |
| backtrace:do_sys_open | 2 | 1 |
| backtrace:SyS_open | 2 | 1 |
| RIP:rcu_read_lock_held | 1 | |
| RIP:___might_sleep | 1 | |
| RIP:lock_is_held | 1 | |
| RIP:arch_cpu_idle | 1 | |
| RIP:sched_clock_local | 1 | 1 |
| invoked_oom-killer:gfp_mask=0x | 2 | 1 |
| Mem-Info | 2 | 1 |
| Out_of_memory:Kill_process | 1 | 1 |
| RIP:set_next_entity | 1 | |
| RIP:raise_softirq | 1 | |
| RIP:get_next_timer_interrupt | 1 | |
| BUG:scheduling_while_atomic | 0 | 14 |
| BUG:sleeping_function_called_from_invalid_context_at_include/linux/pagemap.h | 0 | 1 |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slub.c | 0 | 2 |
| backtrace:do_execve | 0 | 1 |
| backtrace:SyS_execve | 0 | 1 |
| RIP:trace_hardirqs_on | 0 | 1 |
| backtrace:x86_64_start_kernel | 0 | 3 |
| backtrace:do_dup2 | 0 | 2 |
| backtrace:SyS_dup3 | 0 | 2 |
| backtrace:SyS_dup2 | 0 | 2 |
| RIP:trace_hardirqs_on_caller | 0 | 1 |
+------------------------------------------------------------------------------+------------+------------+
The first softlockup seems not related to the commit. But the BUG
following appears related.
[ 360.697040] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 120.359549] XFS (sdc): Unmounting Filesystem
[ 120.378720] XFS (sdd): Unmounting Filesystem
2015-09-19 18:08:35 export TEST_DIR=/fs/sda
[ 360.534202] INFO: task cat-vmstat:4009 blocked for more than 120 seconds.
[ 360.536125] Not tainted 4.3.0-rc1-00050-g8ba8482 #1
[ 360.537786] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 360.540392] cat-vmstat D ffff8800383d6880 13568 4009 1 0x00000000
[ 360.549607] ffff88003d66fa48 0000000000000086 000000177cbca02e ffff8800383d6898
[ 360.552534] ffff8800361e0000 ffff88003b81d400 ffff88003d670000 7fffffffffffffff
[ 360.555425] 7fffffffffffffff ffffffff81c2eae2 0000000000000002 ffff88003d66fa60
[ 360.567558] Call Trace:
[ 360.577645] [<ffffffff81c2eae2>] ? bit_wait+0x4b/0x4b
[ 360.579203] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.580749] [<ffffffff81c31d88>] schedule_timeout+0x3f/0x29d
[ 360.582410] [<ffffffff810c1e0e>] ? sched_clock_cpu+0x99/0xad
[ 360.584026] [<ffffffff810da8a8>] ? mark_held_locks+0x52/0x68
[ 360.585627] [<ffffffff81106cdb>] ? ktime_get+0x8e/0x117
[ 360.605356] [<ffffffff81c2eae2>] ? bit_wait+0x4b/0x4b
[ 360.607036] [<ffffffff8107fe2d>] ? kvm_clock_read+0x25/0x2e
[ 360.608770] [<ffffffff81c2eae2>] ? bit_wait+0x4b/0x4b
[ 360.610315] [<ffffffff81c2d4c7>] io_schedule_timeout+0xb7/0x12b
[ 360.611859] [<ffffffff81c2d4c7>] ? io_schedule_timeout+0xb7/0x12b
[ 360.613416] [<ffffffff81c2eb33>] bit_wait_io+0x51/0x55
[ 360.614845] [<ffffffff81c2e7e5>] __wait_on_bit+0x4b/0x7d
[ 360.616290] [<ffffffff81c2e97e>] out_of_line_wait_on_bit+0x71/0x7c
[ 360.630974] [<ffffffff81c2eae2>] ? bit_wait+0x4b/0x4b
[ 360.632642] [<ffffffff810d086a>] ? autoremove_wake_function+0x3a/0x3a
[ 360.634526] [<ffffffff812cd070>] nfs_wait_on_request+0x47/0x4a
[ 360.636301] [<ffffffff812d1517>] nfs_updatepage+0x637/0x7b9
[ 360.638030] [<ffffffff812c3c53>] nfs_write_end+0x12c/0x2fe
[ 360.639744] [<ffffffff81177a59>] generic_perform_write+0x142/0x1fd
[ 360.641567] [<ffffffff811792e7>] __generic_file_write_iter+0xce/0x174
[ 360.643441] [<ffffffff811794a8>] generic_file_write_iter+0x11b/0x188
[ 360.658129] [<ffffffff812c4477>] nfs_file_write+0xa1/0x11e
[ 360.659622] [<ffffffff811cd5e9>] __vfs_write+0x95/0xbe
[ 360.661046] [<ffffffff811cdce2>] vfs_write+0xbc/0x163
[ 360.671479] [<ffffffff811ce78b>] SyS_write+0x51/0x92
[ 360.673127] [<ffffffff81c337f2>] entry_SYSCALL_64_fastpath+0x12/0x76
[ 360.674915] 2 locks held by cat-vmstat/4009:
[ 360.676182] #0: (sb_writers#12){.+.+.+}, at: [<ffffffff811d099a>] __sb_start_write+0x5f/0xb0
[ 360.679201] #1: (&sb->s_type->i_mutex_key#14){+.+.+.}, at: [<ffffffff811793c5>] generic_file_write_iter+0x38/0x188
[ 360.682508] Sending NMI to all CPUs:
[ 360.697029] NMI backtrace for cpu 0
[ 360.697040] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.697042] no locks held by swapper/0/0.
[ 360.697057] Modules linked in: snd_pcsp
[ 360.697060] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.3.0-rc1-00050-g8ba8482 #1
[ 360.697061] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.697064] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.697066] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.697069] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.697069] Call Trace:
[ 360.697072] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.697076] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.697078] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.697081] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.697083] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.697084] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.697087] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.697089] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.697091] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.697093] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.697096] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.697098] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.701035] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.701036] no locks held by swapper/0/0.
[ 360.701039] Modules linked in: snd_pcsp
[ 360.701041] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.701042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.701045] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.701047] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.701050] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.701050] Call Trace:
[ 360.701054] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.701057] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.701060] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.701063] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.701065] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.701067] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.701069] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.701071] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.701075] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.701078] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.701080] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.701082] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.706048] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.706049] no locks held by swapper/0/0.
[ 360.706052] Modules linked in: snd_pcsp
[ 360.706054] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.706055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.706059] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.706061] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.706063] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.706064] Call Trace:
[ 360.706070] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.706074] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.706076] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.706081] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.706083] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.706085] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.706088] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.706091] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.706096] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.706098] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.706101] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.706103] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.709045] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.709047] no locks held by swapper/0/0.
[ 360.709049] Modules linked in: snd_pcsp
[ 360.709052] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.709053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.709056] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.709058] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.709060] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.709061] Call Trace:
[ 360.709066] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.709069] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.709071] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.709074] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.709076] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.709078] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.709081] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.709083] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.709086] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.709088] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.709090] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.709092] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.717047] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.717048] no locks held by swapper/0/0.
[ 360.717051] Modules linked in: snd_pcsp
[ 360.717054] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.717055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.717058] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.717060] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.717062] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.717063] Call Trace:
[ 360.717069] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.717074] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.717077] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.717081] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.717083] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.717085] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.717089] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.717092] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.717096] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.717099] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.717102] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.717104] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.722112] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.722113] no locks held by swapper/0/0.
[ 360.722116] Modules linked in: snd_pcsp
[ 360.722119] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.722120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.722123] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.722125] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.722128] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.722128] Call Trace:
[ 360.722134] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.722138] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.722140] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.722144] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.722146] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.722148] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.722150] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.722152] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.722156] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.722158] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.722160] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.722162] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.725037] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.725038] no locks held by swapper/0/0.
[ 360.725040] Modules linked in: snd_pcsp
[ 360.725042] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.725043] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.725046] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.725048] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.725050] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.725050] Call Trace:
[ 360.725055] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.725059] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
[ 360.725061] [<ffffffff81c2d5a8>] __schedule+0x6d/0xe9a
[ 360.725064] [<ffffffff81110149>] ? tick_nohz_idle_exit+0xf6/0x102
[ 360.725067] [<ffffffff81c2e44f>] schedule+0x7a/0x8f
[ 360.725068] [<ffffffff81c2e6dc>] schedule_preempt_disabled+0x15/0x1e
[ 360.725071] [<ffffffff810d0e2f>] cpu_startup_entry+0x30b/0x3a3
[ 360.725074] [<ffffffff81c256c3>] rest_init+0x13a/0x140
[ 360.725077] [<ffffffff825ccf0b>] start_kernel+0x43b/0x448
[ 360.725079] [<ffffffff825cc120>] ? early_idt_handler_array+0x120/0x120
[ 360.725081] [<ffffffff825cc4a2>] x86_64_start_reservations+0x2a/0x2c
[ 360.725083] [<ffffffff825cc5dc>] x86_64_start_kernel+0x138/0x145
[ 360.728046] BUG: scheduling while atomic: swapper/0/0/0x00000002
[ 360.728047] no locks held by swapper/0/0.
[ 360.728049] Modules linked in: snd_pcsp
[ 360.728052] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.3.0-rc1-00050-g8ba8482 #1
[ 360.728053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 360.728056] 0000000000000000 ffffffff8222be68 ffffffff814fdfac ffffffff82238580
[ 360.728058] ffffffff8222be80 ffffffff810b7bd4 ffff8800381d6880 ffffffff8222bed8
[ 360.728060] ffffffff81c2d5a8 ffffffff82238580 ffffffff81110149 ffffffff82228000
[ 360.728061] Call Trace:
[ 360.728066] [<ffffffff814fdfac>] dump_stack+0x4b/0x63
[ 360.728069] [<ffffffff810b7bd4>] __schedule_bug+0x64/0x73
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
Thanks,
Ying Huang
View attachment "config-4.3.0-rc1-00050-g8ba8482" of type "text/plain" (106537 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (23312 bytes)
View attachment "job.yaml" of type "text/plain" (2814 bytes)
View attachment "reproduce" of type "text/plain" (289 bytes)
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