* Potential Bug in "echo 0 > /dev/md0"
@ 2015-02-18 16:11 Alireza Haghdoost
2015-02-18 16:19 ` Jes Sorensen
2015-02-18 21:32 ` NeilBrown
0 siblings, 2 replies; 5+ messages in thread
From: Alireza Haghdoost @ 2015-02-18 16:11 UTC (permalink / raw)
To: Linux RAID; +Cc: Neil Brown
I understand this is not the right way to talk with md device but my
understanding is that if some one run this command by mistake (or
vandalism) , it should not results a kernel crash:
[root] [ /home/arh ]
# echo 0 > /dev/md0
[root] [ /home/arh ]
# dmesg
[1463111.320277] BUG: soft lockup - CPU#4 stuck for 22s! [whoopsie:1829]
[1463111.320284] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
pps_core
[1463111.320326] CPU: 4 PID: 1829 Comm: whoopsie Tainted: G D W
3.13.0Write-Hole-Monitor #47
[1463111.320328] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
2.1.3 05/21/2014
[1463111.320329] task: ffff8801a425c7d0 ti: ffff8801a3e04000 task.ti:
ffff8801a3e04000
[1463111.320331] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
smp_call_function_single+0xc6/0x190
[1463111.320335] RSP: 0000:ffff8801a3e05a60 EFLAGS: 00000202
[1463111.320336] RAX: 0000000000000001 RBX: ffffffff813624f4 RCX:
0000000000000000
[1463111.320338] RDX: ffff8801a3e05ad8 RSI: ffff8801a9a54e80 RDI:
0000000000000001
[1463111.320339] RBP: ffff8801a3e05ac8 R08: ffff8801a3e05b70 R09:
0000000000000000
[1463111.320341] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff88031e6bec80
[1463111.320342] R13: ffff880035d70700 R14: ffff8801a9a54400 R15:
ffff88031e6bec80
[1463111.320344] FS: 00007f9ae4924840(0000) GS:ffff8801a9a40000(0000)
knlGS:0000000000000000
[1463111.320346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[1463111.320347] CR2: 00007f9ae43bc280 CR3: 00000001a3adc000 CR4:
00000000000407e0
[1463111.320349] Stack:
[1463111.320350] ffff8801a3e05af8 ffffffff8178f5ae 0000000000000000
0000000000000000
[1463111.320353] 0000000000000000 0000000000000000 0000000000000000
ffff8801a9a54480
[1463111.320357] 0000000000000002 0000000000000001 ffff8801a3e05b70
0000000000000004
[1463111.320360] Call Trace:
[1463111.320364] [<ffffffff8178f5ae>] ?
schedule_hrtimeout_range_clock+0xce/0x170
[1463111.320367] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
[1463111.320369] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
[1463111.320372] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
[1463111.320375] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
[1463111.320378] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
[1463111.320381] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
[1463111.320384] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
[1463111.320386] [<ffffffff8109f8ef>] task_numa_fault+0x26f/0x890
[1463111.320390] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
[1463111.320394] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
[1463111.320396] [<ffffffff8117bc30>] ? change_protection+0x690/0x720
[1463111.320399] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
[1463111.320403] [<ffffffff81191b0b>] ? change_prot_numa+0x1b/0x40
[1463111.320405] [<ffffffff8109c806>] ? task_numa_work+0x266/0x300
[1463111.320408] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
[1463111.320412] [<ffffffff81012e67>] ? do_notify_resume+0x97/0xb0
[1463111.320414] [<ffffffff81794348>] page_fault+0x28/0x30
[1463111.320415] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
89 76
[1463111.344253] BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:1842]
[1463111.344254] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
pps_core
[1463111.344298] CPU: 6 PID: 1842 Comm: Xorg Tainted: G D W
3.13.0Write-Hole-Monitor #47
[1463111.344299] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
2.1.3 05/21/2014
[1463111.344302] task: ffff8800367b8000 ti: ffff880035f9e000 task.ti:
ffff880035f9e000
[1463111.344303] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
smp_call_function_single+0xc6/0x190
[1463111.344306] RSP: 0000:ffff880035f9fa60 EFLAGS: 00003202
[1463111.344308] RAX: 0000000000000001 RBX: 0000000000400000 RCX:
0000000000000000
[1463111.344309] RDX: ffff880035f9fad8 RSI: ffff8801a9a74e80 RDI:
0000000000000003
[1463111.344311] RBP: ffff880035f9fac8 R08: ffff880035f9fb70 R09:
0000000000000000
[1463111.344312] R10: 0000000000000000 R11: 0000000000000000 R12:
00000000003fc02a
[1463111.344313] R13: ffffffff811ca5fc R14: ffff880035f9f9f0 R15:
ffffffff81150fa3
[1463111.344315] FS: 00007f2f338019c0(0000) GS:ffff8801a9a60000(0000)
knlGS:0000000000000000
[1463111.344317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[1463111.344318] CR2: 00007f2f344fdedc CR3: 000000031dd2b000 CR4:
00000000000407e0
[1463111.344320] Stack:
[1463111.344321] ffff880035f9fdf8 ffff880035f9fdf0 0000000000000000
0000000000000000
[1463111.344324] 0000000000000000 0000000000000000 0000000000000000
ffff8801a9a74480
[1463111.344327] 0000000000000002 0000000000000003 ffff880035f9fb70
0000000000000006
[1463111.344330] Call Trace:
[1463111.344334] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
[1463111.344336] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
[1463111.344339] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
[1463111.344342] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
[1463111.344345] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
[1463111.344347] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
[1463111.344351] [<ffffffff811ca500>] ? poll_select_copy_remaining+0x130/0x130
[1463111.344354] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
[1463111.344356] [<ffffffff8109fd00>] task_numa_fault+0x680/0x890
[1463111.344360] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
[1463111.344363] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
[1463111.344366] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
[1463111.344368] [<ffffffff811b7579>] ? do_readv_writev+0x169/0x220
[1463111.344371] [<ffffffff813624f4>] ? timerqueue_del+0x24/0x70
[1463111.344374] [<ffffffff8108baa6>] ? __remove_hrtimer+0x46/0xa0
[1463111.344377] [<ffffffff8108bec8>] ? hrtimer_try_to_cancel+0x48/0xe0
[1463111.344380] [<ffffffff81068b53>] ? do_setitimer+0xe3/0x2a0
[1463111.344382] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
[1463111.344385] [<ffffffff81794348>] page_fault+0x28/0x30
[1463111.344386] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
89 76
[root] [ /home/arh ]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Potential Bug in "echo 0 > /dev/md0"
2015-02-18 16:11 Potential Bug in "echo 0 > /dev/md0" Alireza Haghdoost
@ 2015-02-18 16:19 ` Jes Sorensen
2015-02-18 16:25 ` Alireza Haghdoost
2015-02-18 21:32 ` NeilBrown
1 sibling, 1 reply; 5+ messages in thread
From: Jes Sorensen @ 2015-02-18 16:19 UTC (permalink / raw)
To: Alireza Haghdoost; +Cc: Linux RAID, Neil Brown
Alireza Haghdoost <alireza@cs.umn.edu> writes:
> I understand this is not the right way to talk with md device but my
> understanding is that if some one run this command by mistake (or
> vandalism) , it should not results a kernel crash:
>
> [root] [ /home/arh ]
> # echo 0 > /dev/md0
It shouldn't, however before anyone can debug this, you need to provide
a proper bug report with information about the kernel version you are
running, the configuration of /dev/md0 etc.
Please include 'cat /proc/mdstat' output with it.
JEs
>
> [root] [ /home/arh ]
> # dmesg
> [1463111.320277] BUG: soft lockup - CPU#4 stuck for 22s! [whoopsie:1829]
> [1463111.320284] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
> pps_core
> [1463111.320326] CPU: 4 PID: 1829 Comm: whoopsie Tainted: G D W
> 3.13.0Write-Hole-Monitor #47
> [1463111.320328] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
> 2.1.3 05/21/2014
> [1463111.320329] task: ffff8801a425c7d0 ti: ffff8801a3e04000 task.ti:
> ffff8801a3e04000
> [1463111.320331] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
> smp_call_function_single+0xc6/0x190
> [1463111.320335] RSP: 0000:ffff8801a3e05a60 EFLAGS: 00000202
> [1463111.320336] RAX: 0000000000000001 RBX: ffffffff813624f4 RCX:
> 0000000000000000
> [1463111.320338] RDX: ffff8801a3e05ad8 RSI: ffff8801a9a54e80 RDI:
> 0000000000000001
> [1463111.320339] RBP: ffff8801a3e05ac8 R08: ffff8801a3e05b70 R09:
> 0000000000000000
> [1463111.320341] R10: 0000000000000000 R11: 0000000000000000 R12:
> ffff88031e6bec80
> [1463111.320342] R13: ffff880035d70700 R14: ffff8801a9a54400 R15:
> ffff88031e6bec80
> [1463111.320344] FS: 00007f9ae4924840(0000) GS:ffff8801a9a40000(0000)
> knlGS:0000000000000000
> [1463111.320346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [1463111.320347] CR2: 00007f9ae43bc280 CR3: 00000001a3adc000 CR4:
> 00000000000407e0
> [1463111.320349] Stack:
> [1463111.320350] ffff8801a3e05af8 ffffffff8178f5ae 0000000000000000
> 0000000000000000
> [1463111.320353] 0000000000000000 0000000000000000 0000000000000000
> ffff8801a9a54480
> [1463111.320357] 0000000000000002 0000000000000001 ffff8801a3e05b70
> 0000000000000004
> [1463111.320360] Call Trace:
> [1463111.320364] [<ffffffff8178f5ae>] ?
> schedule_hrtimeout_range_clock+0xce/0x170
> [1463111.320367] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
> [1463111.320369] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.320372] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.320375] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
> [1463111.320378] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
> [1463111.320381] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
> [1463111.320384] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
> [1463111.320386] [<ffffffff8109f8ef>] task_numa_fault+0x26f/0x890
> [1463111.320390] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
> [1463111.320394] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
> [1463111.320396] [<ffffffff8117bc30>] ? change_protection+0x690/0x720
> [1463111.320399] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
> [1463111.320403] [<ffffffff81191b0b>] ? change_prot_numa+0x1b/0x40
> [1463111.320405] [<ffffffff8109c806>] ? task_numa_work+0x266/0x300
> [1463111.320408] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
> [1463111.320412] [<ffffffff81012e67>] ? do_notify_resume+0x97/0xb0
> [1463111.320414] [<ffffffff81794348>] page_fault+0x28/0x30
> [1463111.320415] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
> 89 76
> [1463111.344253] BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:1842]
> [1463111.344254] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
> pps_core
> [1463111.344298] CPU: 6 PID: 1842 Comm: Xorg Tainted: G D W
> 3.13.0Write-Hole-Monitor #47
> [1463111.344299] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
> 2.1.3 05/21/2014
> [1463111.344302] task: ffff8800367b8000 ti: ffff880035f9e000 task.ti:
> ffff880035f9e000
> [1463111.344303] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
> smp_call_function_single+0xc6/0x190
> [1463111.344306] RSP: 0000:ffff880035f9fa60 EFLAGS: 00003202
> [1463111.344308] RAX: 0000000000000001 RBX: 0000000000400000 RCX:
> 0000000000000000
> [1463111.344309] RDX: ffff880035f9fad8 RSI: ffff8801a9a74e80 RDI:
> 0000000000000003
> [1463111.344311] RBP: ffff880035f9fac8 R08: ffff880035f9fb70 R09:
> 0000000000000000
> [1463111.344312] R10: 0000000000000000 R11: 0000000000000000 R12:
> 00000000003fc02a
> [1463111.344313] R13: ffffffff811ca5fc R14: ffff880035f9f9f0 R15:
> ffffffff81150fa3
> [1463111.344315] FS: 00007f2f338019c0(0000) GS:ffff8801a9a60000(0000)
> knlGS:0000000000000000
> [1463111.344317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [1463111.344318] CR2: 00007f2f344fdedc CR3: 000000031dd2b000 CR4:
> 00000000000407e0
> [1463111.344320] Stack:
> [1463111.344321] ffff880035f9fdf8 ffff880035f9fdf0 0000000000000000
> 0000000000000000
> [1463111.344324] 0000000000000000 0000000000000000 0000000000000000
> ffff8801a9a74480
> [1463111.344327] 0000000000000002 0000000000000003 ffff880035f9fb70
> 0000000000000006
> [1463111.344330] Call Trace:
> [1463111.344334] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
> [1463111.344336] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.344339] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.344342] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
> [1463111.344345] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
> [1463111.344347] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
> [1463111.344351] [<ffffffff811ca500>] ? poll_select_copy_remaining+0x130/0x130
> [1463111.344354] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
> [1463111.344356] [<ffffffff8109fd00>] task_numa_fault+0x680/0x890
> [1463111.344360] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
> [1463111.344363] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
> [1463111.344366] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
> [1463111.344368] [<ffffffff811b7579>] ? do_readv_writev+0x169/0x220
> [1463111.344371] [<ffffffff813624f4>] ? timerqueue_del+0x24/0x70
> [1463111.344374] [<ffffffff8108baa6>] ? __remove_hrtimer+0x46/0xa0
> [1463111.344377] [<ffffffff8108bec8>] ? hrtimer_try_to_cancel+0x48/0xe0
> [1463111.344380] [<ffffffff81068b53>] ? do_setitimer+0xe3/0x2a0
> [1463111.344382] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
> [1463111.344385] [<ffffffff81794348>] page_fault+0x28/0x30
> [1463111.344386] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
> 89 76
> [root] [ /home/arh ]
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Potential Bug in "echo 0 > /dev/md0"
2015-02-18 16:19 ` Jes Sorensen
@ 2015-02-18 16:25 ` Alireza Haghdoost
2015-02-18 20:20 ` Jes Sorensen
0 siblings, 1 reply; 5+ messages in thread
From: Alireza Haghdoost @ 2015-02-18 16:25 UTC (permalink / raw)
To: Jes Sorensen; +Cc: Linux RAID, Neil Brown
Here you are:
[root] [ /home/arh ]
# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5]
[raid4] [multipath] [faulty]
md0 : active raid5 sde[4] sdd[2] sdc[1] sdb[0]
314374656 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
[root] [ /home/arh ]
# uname -a
Linux mist01-umh 3.13.0 #47 SMP Sun Feb 1 10:27:24 CST 2015 x86_64
x86_64 x86_64 GNU/Linux
[root] [ /home/arh ]
# cat /etc/issue
Ubuntu 14.04.1 LTS \n \l
[root] [ /home/arh ]
# mdadm --version
mdadm - v3.2.5 - 18th May 2012
[root] [ /home/arh ]
# mdadm --detail /dev/md0
<No output, Freezes since kernel is crashed !>
On Wed, Feb 18, 2015 at 10:19 AM, Jes Sorensen <Jes.Sorensen@redhat.com> wrote:
> Alireza Haghdoost <alireza@cs.umn.edu> writes:
>> I understand this is not the right way to talk with md device but my
>> understanding is that if some one run this command by mistake (or
>> vandalism) , it should not results a kernel crash:
>>
>> [root] [ /home/arh ]
>> # echo 0 > /dev/md0
>
> It shouldn't, however before anyone can debug this, you need to provide
> a proper bug report with information about the kernel version you are
> running, the configuration of /dev/md0 etc.
>
> Please include 'cat /proc/mdstat' output with it.
>
> JEs
>
>>
>> [root] [ /home/arh ]
>> # dmesg
>> [1463111.320277] BUG: soft lockup - CPU#4 stuck for 22s! [whoopsie:1829]
>> [1463111.320284] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
>> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
>> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
>> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
>> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
>> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
>> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
>> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
>> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
>> pps_core
>> [1463111.320326] CPU: 4 PID: 1829 Comm: whoopsie Tainted: G D W
>> 3.13.0Write-Hole-Monitor #47
>> [1463111.320328] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
>> 2.1.3 05/21/2014
>> [1463111.320329] task: ffff8801a425c7d0 ti: ffff8801a3e04000 task.ti:
>> ffff8801a3e04000
>> [1463111.320331] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
>> smp_call_function_single+0xc6/0x190
>> [1463111.320335] RSP: 0000:ffff8801a3e05a60 EFLAGS: 00000202
>> [1463111.320336] RAX: 0000000000000001 RBX: ffffffff813624f4 RCX:
>> 0000000000000000
>> [1463111.320338] RDX: ffff8801a3e05ad8 RSI: ffff8801a9a54e80 RDI:
>> 0000000000000001
>> [1463111.320339] RBP: ffff8801a3e05ac8 R08: ffff8801a3e05b70 R09:
>> 0000000000000000
>> [1463111.320341] R10: 0000000000000000 R11: 0000000000000000 R12:
>> ffff88031e6bec80
>> [1463111.320342] R13: ffff880035d70700 R14: ffff8801a9a54400 R15:
>> ffff88031e6bec80
>> [1463111.320344] FS: 00007f9ae4924840(0000) GS:ffff8801a9a40000(0000)
>> knlGS:0000000000000000
>> [1463111.320346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [1463111.320347] CR2: 00007f9ae43bc280 CR3: 00000001a3adc000 CR4:
>> 00000000000407e0
>> [1463111.320349] Stack:
>> [1463111.320350] ffff8801a3e05af8 ffffffff8178f5ae 0000000000000000
>> 0000000000000000
>> [1463111.320353] 0000000000000000 0000000000000000 0000000000000000
>> ffff8801a9a54480
>> [1463111.320357] 0000000000000002 0000000000000001 ffff8801a3e05b70
>> 0000000000000004
>> [1463111.320360] Call Trace:
>> [1463111.320364] [<ffffffff8178f5ae>] ?
>> schedule_hrtimeout_range_clock+0xce/0x170
>> [1463111.320367] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
>> [1463111.320369] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>> [1463111.320372] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>> [1463111.320375] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
>> [1463111.320378] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
>> [1463111.320381] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
>> [1463111.320384] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
>> [1463111.320386] [<ffffffff8109f8ef>] task_numa_fault+0x26f/0x890
>> [1463111.320390] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
>> [1463111.320394] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
>> [1463111.320396] [<ffffffff8117bc30>] ? change_protection+0x690/0x720
>> [1463111.320399] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
>> [1463111.320403] [<ffffffff81191b0b>] ? change_prot_numa+0x1b/0x40
>> [1463111.320405] [<ffffffff8109c806>] ? task_numa_work+0x266/0x300
>> [1463111.320408] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
>> [1463111.320412] [<ffffffff81012e67>] ? do_notify_resume+0x97/0xb0
>> [1463111.320414] [<ffffffff81794348>] page_fault+0x28/0x30
>> [1463111.320415] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
>> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
>> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
>> 89 76
>> [1463111.344253] BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:1842]
>> [1463111.344254] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
>> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
>> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
>> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
>> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
>> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
>> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
>> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
>> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
>> pps_core
>> [1463111.344298] CPU: 6 PID: 1842 Comm: Xorg Tainted: G D W
>> 3.13.0Write-Hole-Monitor #47
>> [1463111.344299] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
>> 2.1.3 05/21/2014
>> [1463111.344302] task: ffff8800367b8000 ti: ffff880035f9e000 task.ti:
>> ffff880035f9e000
>> [1463111.344303] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
>> smp_call_function_single+0xc6/0x190
>> [1463111.344306] RSP: 0000:ffff880035f9fa60 EFLAGS: 00003202
>> [1463111.344308] RAX: 0000000000000001 RBX: 0000000000400000 RCX:
>> 0000000000000000
>> [1463111.344309] RDX: ffff880035f9fad8 RSI: ffff8801a9a74e80 RDI:
>> 0000000000000003
>> [1463111.344311] RBP: ffff880035f9fac8 R08: ffff880035f9fb70 R09:
>> 0000000000000000
>> [1463111.344312] R10: 0000000000000000 R11: 0000000000000000 R12:
>> 00000000003fc02a
>> [1463111.344313] R13: ffffffff811ca5fc R14: ffff880035f9f9f0 R15:
>> ffffffff81150fa3
>> [1463111.344315] FS: 00007f2f338019c0(0000) GS:ffff8801a9a60000(0000)
>> knlGS:0000000000000000
>> [1463111.344317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [1463111.344318] CR2: 00007f2f344fdedc CR3: 000000031dd2b000 CR4:
>> 00000000000407e0
>> [1463111.344320] Stack:
>> [1463111.344321] ffff880035f9fdf8 ffff880035f9fdf0 0000000000000000
>> 0000000000000000
>> [1463111.344324] 0000000000000000 0000000000000000 0000000000000000
>> ffff8801a9a74480
>> [1463111.344327] 0000000000000002 0000000000000003 ffff880035f9fb70
>> 0000000000000006
>> [1463111.344330] Call Trace:
>> [1463111.344334] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
>> [1463111.344336] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>> [1463111.344339] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>> [1463111.344342] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
>> [1463111.344345] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
>> [1463111.344347] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
>> [1463111.344351] [<ffffffff811ca500>] ? poll_select_copy_remaining+0x130/0x130
>> [1463111.344354] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
>> [1463111.344356] [<ffffffff8109fd00>] task_numa_fault+0x680/0x890
>> [1463111.344360] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
>> [1463111.344363] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
>> [1463111.344366] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
>> [1463111.344368] [<ffffffff811b7579>] ? do_readv_writev+0x169/0x220
>> [1463111.344371] [<ffffffff813624f4>] ? timerqueue_del+0x24/0x70
>> [1463111.344374] [<ffffffff8108baa6>] ? __remove_hrtimer+0x46/0xa0
>> [1463111.344377] [<ffffffff8108bec8>] ? hrtimer_try_to_cancel+0x48/0xe0
>> [1463111.344380] [<ffffffff81068b53>] ? do_setitimer+0xe3/0x2a0
>> [1463111.344382] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
>> [1463111.344385] [<ffffffff81794348>] page_fault+0x28/0x30
>> [1463111.344386] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
>> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
>> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
>> 89 76
>> [root] [ /home/arh ]
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Potential Bug in "echo 0 > /dev/md0"
2015-02-18 16:25 ` Alireza Haghdoost
@ 2015-02-18 20:20 ` Jes Sorensen
0 siblings, 0 replies; 5+ messages in thread
From: Jes Sorensen @ 2015-02-18 20:20 UTC (permalink / raw)
To: Alireza Haghdoost; +Cc: Linux RAID, Neil Brown
Alireza Haghdoost <alireza@cs.umn.edu> writes:
> Here you are:
>
> [root] [ /home/arh ]
> # cat /proc/mdstat
> Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5]
> [raid4] [multipath] [faulty]
> md0 : active raid5 sde[4] sdd[2] sdc[1] sdb[0]
> 314374656 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
>
>
> [root] [ /home/arh ]
> # uname -a
> Linux mist01-umh 3.13.0 #47 SMP Sun Feb 1 10:27:24 CST 2015 x86_64
> x86_64 x86_64 GNU/Linux
>
> [root] [ /home/arh ]
> # cat /etc/issue
> Ubuntu 14.04.1 LTS \n \l
I am unfamiliar with Ubuntu's kernels, is this a distro kernel or a self
compiled kernel? If this is a distro kernel, please start out by
reporting the bug to your distribution through their bug tracking
system.
3.13 is very old, so it would be help if you tried against a recent
kernel.
Jes
>
> [root] [ /home/arh ]
> # mdadm --version
> mdadm - v3.2.5 - 18th May 2012
>
> [root] [ /home/arh ]
> # mdadm --detail /dev/md0
> <No output, Freezes since kernel is crashed !>
>
> On Wed, Feb 18, 2015 at 10:19 AM, Jes Sorensen <Jes.Sorensen@redhat.com> wrote:
>> Alireza Haghdoost <alireza@cs.umn.edu> writes:
>>> I understand this is not the right way to talk with md device but my
>>> understanding is that if some one run this command by mistake (or
>>> vandalism) , it should not results a kernel crash:
>>>
>>> [root] [ /home/arh ]
>>> # echo 0 > /dev/md0
>>
>> It shouldn't, however before anyone can debug this, you need to provide
>> a proper bug report with information about the kernel version you are
>> running, the configuration of /dev/md0 etc.
>>
>> Please include 'cat /proc/mdstat' output with it.
>>
>> JEs
>>
>>>
>>> [root] [ /home/arh ]
>>> # dmesg
>>> [1463111.320277] BUG: soft lockup - CPU#4 stuck for 22s! [whoopsie:1829]
>>> [1463111.320284] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
>>> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
>>> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
>>> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
>>> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
>>> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
>>> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
>>> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
>>> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
>>> pps_core
>>> [1463111.320326] CPU: 4 PID: 1829 Comm: whoopsie Tainted: G D W
>>> 3.13.0Write-Hole-Monitor #47
>>> [1463111.320328] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
>>> 2.1.3 05/21/2014
>>> [1463111.320329] task: ffff8801a425c7d0 ti: ffff8801a3e04000 task.ti:
>>> ffff8801a3e04000
>>> [1463111.320331] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
>>> smp_call_function_single+0xc6/0x190
>>> [1463111.320335] RSP: 0000:ffff8801a3e05a60 EFLAGS: 00000202
>>> [1463111.320336] RAX: 0000000000000001 RBX: ffffffff813624f4 RCX:
>>> 0000000000000000
>>> [1463111.320338] RDX: ffff8801a3e05ad8 RSI: ffff8801a9a54e80 RDI:
>>> 0000000000000001
>>> [1463111.320339] RBP: ffff8801a3e05ac8 R08: ffff8801a3e05b70 R09:
>>> 0000000000000000
>>> [1463111.320341] R10: 0000000000000000 R11: 0000000000000000 R12:
>>> ffff88031e6bec80
>>> [1463111.320342] R13: ffff880035d70700 R14: ffff8801a9a54400 R15:
>>> ffff88031e6bec80
>>> [1463111.320344] FS: 00007f9ae4924840(0000) GS:ffff8801a9a40000(0000)
>>> knlGS:0000000000000000
>>> [1463111.320346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> [1463111.320347] CR2: 00007f9ae43bc280 CR3: 00000001a3adc000 CR4:
>>> 00000000000407e0
>>> [1463111.320349] Stack:
>>> [1463111.320350] ffff8801a3e05af8 ffffffff8178f5ae 0000000000000000
>>> 0000000000000000
>>> [1463111.320353] 0000000000000000 0000000000000000 0000000000000000
>>> ffff8801a9a54480
>>> [1463111.320357] 0000000000000002 0000000000000001 ffff8801a3e05b70
>>> 0000000000000004
>>> [1463111.320360] Call Trace:
>>> [1463111.320364] [<ffffffff8178f5ae>] ?
>>> schedule_hrtimeout_range_clock+0xce/0x170
>>> [1463111.320367] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
>>> [1463111.320369] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>>> [1463111.320372] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>>> [1463111.320375] [<ffffffff81095e80>] ?
>>> __migrate_swap_task.part.68+0x80/0x80
>>> [1463111.320378] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
>>> [1463111.320381] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
>>> [1463111.320384] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
>>> [1463111.320386] [<ffffffff8109f8ef>] task_numa_fault+0x26f/0x890
>>> [1463111.320390] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
>>> [1463111.320394] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
>>> [1463111.320396] [<ffffffff8117bc30>] ? change_protection+0x690/0x720
>>> [1463111.320399] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
>>> [1463111.320403] [<ffffffff81191b0b>] ? change_prot_numa+0x1b/0x40
>>> [1463111.320405] [<ffffffff8109c806>] ? task_numa_work+0x266/0x300
>>> [1463111.320408] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
>>> [1463111.320412] [<ffffffff81012e67>] ? do_notify_resume+0x97/0xb0
>>> [1463111.320414] [<ffffffff81794348>] page_fault+0x28/0x30
>>> [1463111.320415] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
>>> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
>>> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
>>> 89 76
>>> [1463111.344253] BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:1842]
>>> [1463111.344254] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
>>> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
>>> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
>>> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
>>> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
>>> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
>>> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
>>> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
>>> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
>>> pps_core
>>> [1463111.344298] CPU: 6 PID: 1842 Comm: Xorg Tainted: G D W
>>> 3.13.0Write-Hole-Monitor #47
>>> [1463111.344299] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
>>> 2.1.3 05/21/2014
>>> [1463111.344302] task: ffff8800367b8000 ti: ffff880035f9e000 task.ti:
>>> ffff880035f9e000
>>> [1463111.344303] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
>>> smp_call_function_single+0xc6/0x190
>>> [1463111.344306] RSP: 0000:ffff880035f9fa60 EFLAGS: 00003202
>>> [1463111.344308] RAX: 0000000000000001 RBX: 0000000000400000 RCX:
>>> 0000000000000000
>>> [1463111.344309] RDX: ffff880035f9fad8 RSI: ffff8801a9a74e80 RDI:
>>> 0000000000000003
>>> [1463111.344311] RBP: ffff880035f9fac8 R08: ffff880035f9fb70 R09:
>>> 0000000000000000
>>> [1463111.344312] R10: 0000000000000000 R11: 0000000000000000 R12:
>>> 00000000003fc02a
>>> [1463111.344313] R13: ffffffff811ca5fc R14: ffff880035f9f9f0 R15:
>>> ffffffff81150fa3
>>> [1463111.344315] FS: 00007f2f338019c0(0000) GS:ffff8801a9a60000(0000)
>>> knlGS:0000000000000000
>>> [1463111.344317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> [1463111.344318] CR2: 00007f2f344fdedc CR3: 000000031dd2b000 CR4:
>>> 00000000000407e0
>>> [1463111.344320] Stack:
>>> [1463111.344321] ffff880035f9fdf8 ffff880035f9fdf0 0000000000000000
>>> 0000000000000000
>>> [1463111.344324] 0000000000000000 0000000000000000 0000000000000000
>>> ffff8801a9a74480
>>> [1463111.344327] 0000000000000002 0000000000000003 ffff880035f9fb70
>>> 0000000000000006
>>> [1463111.344330] Call Trace:
>>> [1463111.344334] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
>>> [1463111.344336] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>>> [1463111.344339] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
>>> [1463111.344342] [<ffffffff81095e80>] ?
>>> __migrate_swap_task.part.68+0x80/0x80
>>> [1463111.344345] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
>>> [1463111.344347] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
>>> [1463111.344351] [<ffffffff811ca500>] ?
>>> poll_select_copy_remaining+0x130/0x130
>>> [1463111.344354] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
>>> [1463111.344356] [<ffffffff8109fd00>] task_numa_fault+0x680/0x890
>>> [1463111.344360] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
>>> [1463111.344363] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
>>> [1463111.344366] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
>>> [1463111.344368] [<ffffffff811b7579>] ? do_readv_writev+0x169/0x220
>>> [1463111.344371] [<ffffffff813624f4>] ? timerqueue_del+0x24/0x70
>>> [1463111.344374] [<ffffffff8108baa6>] ? __remove_hrtimer+0x46/0xa0
>>> [1463111.344377] [<ffffffff8108bec8>] ? hrtimer_try_to_cancel+0x48/0xe0
>>> [1463111.344380] [<ffffffff81068b53>] ? do_setitimer+0xe3/0x2a0
>>> [1463111.344382] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
>>> [1463111.344385] [<ffffffff81794348>] page_fault+0x28/0x30
>>> [1463111.344386] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
>>> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
>>> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
>>> 89 76
>>> [root] [ /home/arh ]
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Potential Bug in "echo 0 > /dev/md0"
2015-02-18 16:11 Potential Bug in "echo 0 > /dev/md0" Alireza Haghdoost
2015-02-18 16:19 ` Jes Sorensen
@ 2015-02-18 21:32 ` NeilBrown
1 sibling, 0 replies; 5+ messages in thread
From: NeilBrown @ 2015-02-18 21:32 UTC (permalink / raw)
To: Alireza Haghdoost; +Cc: Linux RAID
[-- Attachment #1: Type: text/plain, Size: 8509 bytes --]
On Wed, 18 Feb 2015 10:11:20 -0600 Alireza Haghdoost <alireza@cs.umn.edu>
wrote:
> I understand this is not the right way to talk with md device but my
> understanding is that if some one run this command by mistake (or
> vandalism) , it should not results a kernel crash:
>
> [root] [ /home/arh ]
> # echo 0 > /dev/md0
>
> [root] [ /home/arh ]
> # dmesg
> [1463111.320277] BUG: soft lockup - CPU#4 stuck for 22s! [whoopsie:1829]
> [1463111.320284] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
> pps_core
> [1463111.320326] CPU: 4 PID: 1829 Comm: whoopsie Tainted: G D W
^^^^^^^^
What is "whoopsie" ???
> 3.13.0Write-Hole-Monitor #47
^^^^^^^^^^^^^^^^^^^
What is "Write-Hole-Monitor".
There is no evidence that this is related to RAID, except that it presumably
happens at about the same time that you write to /dev/md0.
It certainly isn't running and md/raid code when it reports a soft-lockup.
NeilBrown
> [1463111.320328] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
> 2.1.3 05/21/2014
> [1463111.320329] task: ffff8801a425c7d0 ti: ffff8801a3e04000 task.ti:
> ffff8801a3e04000
> [1463111.320331] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
> smp_call_function_single+0xc6/0x190
> [1463111.320335] RSP: 0000:ffff8801a3e05a60 EFLAGS: 00000202
> [1463111.320336] RAX: 0000000000000001 RBX: ffffffff813624f4 RCX:
> 0000000000000000
> [1463111.320338] RDX: ffff8801a3e05ad8 RSI: ffff8801a9a54e80 RDI:
> 0000000000000001
> [1463111.320339] RBP: ffff8801a3e05ac8 R08: ffff8801a3e05b70 R09:
> 0000000000000000
> [1463111.320341] R10: 0000000000000000 R11: 0000000000000000 R12:
> ffff88031e6bec80
> [1463111.320342] R13: ffff880035d70700 R14: ffff8801a9a54400 R15:
> ffff88031e6bec80
> [1463111.320344] FS: 00007f9ae4924840(0000) GS:ffff8801a9a40000(0000)
> knlGS:0000000000000000
> [1463111.320346] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [1463111.320347] CR2: 00007f9ae43bc280 CR3: 00000001a3adc000 CR4:
> 00000000000407e0
> [1463111.320349] Stack:
> [1463111.320350] ffff8801a3e05af8 ffffffff8178f5ae 0000000000000000
> 0000000000000000
> [1463111.320353] 0000000000000000 0000000000000000 0000000000000000
> ffff8801a9a54480
> [1463111.320357] 0000000000000002 0000000000000001 ffff8801a3e05b70
> 0000000000000004
> [1463111.320360] Call Trace:
> [1463111.320364] [<ffffffff8178f5ae>] ?
> schedule_hrtimeout_range_clock+0xce/0x170
> [1463111.320367] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
> [1463111.320369] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.320372] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.320375] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
> [1463111.320378] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
> [1463111.320381] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
> [1463111.320384] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
> [1463111.320386] [<ffffffff8109f8ef>] task_numa_fault+0x26f/0x890
> [1463111.320390] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
> [1463111.320394] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
> [1463111.320396] [<ffffffff8117bc30>] ? change_protection+0x690/0x720
> [1463111.320399] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
> [1463111.320403] [<ffffffff81191b0b>] ? change_prot_numa+0x1b/0x40
> [1463111.320405] [<ffffffff8109c806>] ? task_numa_work+0x266/0x300
> [1463111.320408] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
> [1463111.320412] [<ffffffff81012e67>] ? do_notify_resume+0x97/0xb0
> [1463111.320414] [<ffffffff81794348>] page_fault+0x28/0x30
> [1463111.320415] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
> 89 76
> [1463111.344253] BUG: soft lockup - CPU#6 stuck for 22s! [Xorg:1842]
> [1463111.344254] Modules linked in: ib_iser rdma_cm ib_addr iw_cm
> ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi bnep rfcomm
> bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp nfsd
> coretemp kvm_intel kvm joydev auth_rpcgss crct10dif_pclmul
> crc32_pclmul gpio_ich mei_me ghash_clmulni_intel nfs_acl
> acpi_power_meter aesni_intel aes_x86_64 nfs glue_helper mei lrw
> gf128mul lpc_ich ablk_helper cryptd sb_edac dcdbas edac_core shpchp
> wmi mac_hid lockd sunrpc parport_pc ppdev ipmi_si ipmi_devintf fscache
> lp parport hid_generic ixgbe tg3 usbhid dca ahci mdio hid libahci ptp
> pps_core
> [1463111.344298] CPU: 6 PID: 1842 Comm: Xorg Tainted: G D W
> 3.13.0Write-Hole-Monitor #47
> [1463111.344299] Hardware name: Dell Inc. PowerEdge R420/0JD6X3, BIOS
> 2.1.3 05/21/2014
> [1463111.344302] task: ffff8800367b8000 ti: ffff880035f9e000 task.ti:
> ffff880035f9e000
> [1463111.344303] RIP: 0010:[<ffffffff810d8446>] [<ffffffff810d8446>]
> smp_call_function_single+0xc6/0x190
> [1463111.344306] RSP: 0000:ffff880035f9fa60 EFLAGS: 00003202
> [1463111.344308] RAX: 0000000000000001 RBX: 0000000000400000 RCX:
> 0000000000000000
> [1463111.344309] RDX: ffff880035f9fad8 RSI: ffff8801a9a74e80 RDI:
> 0000000000000003
> [1463111.344311] RBP: ffff880035f9fac8 R08: ffff880035f9fb70 R09:
> 0000000000000000
> [1463111.344312] R10: 0000000000000000 R11: 0000000000000000 R12:
> 00000000003fc02a
> [1463111.344313] R13: ffffffff811ca5fc R14: ffff880035f9f9f0 R15:
> ffffffff81150fa3
> [1463111.344315] FS: 00007f2f338019c0(0000) GS:ffff8801a9a60000(0000)
> knlGS:0000000000000000
> [1463111.344317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [1463111.344318] CR2: 00007f2f344fdedc CR3: 000000031dd2b000 CR4:
> 00000000000407e0
> [1463111.344320] Stack:
> [1463111.344321] ffff880035f9fdf8 ffff880035f9fdf0 0000000000000000
> 0000000000000000
> [1463111.344324] 0000000000000000 0000000000000000 0000000000000000
> ffff8801a9a74480
> [1463111.344327] 0000000000000002 0000000000000003 ffff880035f9fb70
> 0000000000000006
> [1463111.344330] Call Trace:
> [1463111.344334] [<ffffffff810f1e8c>] stop_two_cpus+0x14c/0x1a0
> [1463111.344336] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.344339] [<ffffffff810f18a0>] ? cpu_stop_should_run+0x50/0x50
> [1463111.344342] [<ffffffff81095e80>] ? __migrate_swap_task.part.68+0x80/0x80
> [1463111.344345] [<ffffffff8109624a>] migrate_swap+0x8a/0xa0
> [1463111.344347] [<ffffffff8109e133>] task_numa_migrate+0x1d3/0x480
> [1463111.344351] [<ffffffff811ca500>] ? poll_select_copy_remaining+0x130/0x130
> [1463111.344354] [<ffffffff8109e433>] numa_migrate_preferred+0x53/0x60
> [1463111.344356] [<ffffffff8109fd00>] task_numa_fault+0x680/0x890
> [1463111.344360] [<ffffffff8117269e>] do_numa_page+0x13e/0x1a0
> [1463111.344363] [<ffffffff81173823>] handle_mm_fault+0x5e3/0xe30
> [1463111.344366] [<ffffffff81797ac4>] __do_page_fault+0x154/0x570
> [1463111.344368] [<ffffffff811b7579>] ? do_readv_writev+0x169/0x220
> [1463111.344371] [<ffffffff813624f4>] ? timerqueue_del+0x24/0x70
> [1463111.344374] [<ffffffff8108baa6>] ? __remove_hrtimer+0x46/0xa0
> [1463111.344377] [<ffffffff8108bec8>] ? hrtimer_try_to_cancel+0x48/0xe0
> [1463111.344380] [<ffffffff81068b53>] ? do_setitimer+0xe3/0x2a0
> [1463111.344382] [<ffffffff81797efa>] do_page_fault+0x1a/0x70
> [1463111.344385] [<ffffffff81794348>] page_fault+0x28/0x30
> [1463111.344386] Code: 00 00 00 85 c9 48 8d 74 24 10 75 1b 48 c7 c6 80
> 4e 01 00 65 48 03 34 25 c8 dc 00 00 0f b7 46 20 a8 01 74 0b 90 f3 90
> 0f b7 46 20 <a8> 01 75 f6 83 c8 01 66 89 46 20 0f ae f0 48 89 56 18 4c
> 89 76
> [root] [ /home/arh ]
> --
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-02-18 21:32 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-02-18 16:11 Potential Bug in "echo 0 > /dev/md0" Alireza Haghdoost
2015-02-18 16:19 ` Jes Sorensen
2015-02-18 16:25 ` Alireza Haghdoost
2015-02-18 20:20 ` Jes Sorensen
2015-02-18 21:32 ` NeilBrown
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