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Message #80771
[Bug 1356558] Re: BUG: soft lockup - CPU stuck for 22s! [md3_raid1]
Hello Joseph,
the last kernel, you have prepared for testing contains this bug.
I've just noticed that 3.13.0-031300rc3-generic kernel contains the bug
the bug as well, so the bisect went in the wrong direction. Sorry for
this. I'll have a deeper look inside, hoping to understand why the bug
didn't appear during the first testing.
[44094.835704] md: data-check of RAID array md1
[44094.835716] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[44094.835723] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
[44094.835732] md: using 128k window, over a total of 4192192k.
[44095.909810] type=1400 audit(1411015241.514:35): apparmor="STATUS" operation="profile_replace" name="/usr/lib/cups/backend/cups-pdf" pid=8865 comm="apparmor_parser"
[44095.909839] type=1400 audit(1411015241.514:36): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/cupsd" pid=8865 comm="apparmor_parser"
[44095.912967] type=1400 audit(1411015241.518:37): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/cupsd" pid=8865 comm="apparmor_parser"
[44403.916160] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[44403.916448] Not tainted 3.13.0-031300rc3-generic #201312061335
[44403.916692] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[44403.916988] md1_resync D c10a8e24 0 8767 2 0x00000000
[44403.917009] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[44403.917039] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[44403.917066] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[44403.917093] Call Trace:
[44403.917122] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[44403.917141] [<c105bbd2>] ? irq_exit+0x62/0xa0
[44403.917162] [<c16998b3>] ? common_interrupt+0x33/0x38
[44403.917178] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[44403.917195] [<c168e733>] schedule+0x23/0x60
[44403.917247] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[44403.917263] [<c1094010>] ? __wake_up_sync+0x20/0x20
[44403.917291] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[44403.917312] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[44403.917341] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[44403.917361] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[44403.917379] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44403.917395] [<c1531e84>] md_thread+0xe4/0x110
[44403.917409] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[44403.917426] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44403.917441] [<c107625b>] kthread+0x9b/0xb0
[44403.917459] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[44403.917474] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[44523.916155] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[44523.916433] Not tainted 3.13.0-031300rc3-generic #201312061335
[44523.916676] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[44523.916972] md1_resync D c10a8e24 0 8767 2 0x00000000
[44523.916993] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[44523.917022] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[44523.917049] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[44523.917077] Call Trace:
[44523.917106] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[44523.917125] [<c105bbd2>] ? irq_exit+0x62/0xa0
[44523.917145] [<c16998b3>] ? common_interrupt+0x33/0x38
[44523.917162] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[44523.917179] [<c168e733>] schedule+0x23/0x60
[44523.917232] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[44523.917248] [<c1094010>] ? __wake_up_sync+0x20/0x20
[44523.917276] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[44523.917296] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[44523.917325] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[44523.917345] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[44523.917363] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44523.917379] [<c1531e84>] md_thread+0xe4/0x110
[44523.917393] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[44523.917410] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44523.917425] [<c107625b>] kthread+0x9b/0xb0
[44523.917443] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[44523.917458] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[44643.916158] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[44643.916436] Not tainted 3.13.0-031300rc3-generic #201312061335
[44643.916679] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[44643.916975] md1_resync D c10a8e24 0 8767 2 0x00000000
[44643.916996] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[44643.917026] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[44643.917052] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[44643.917080] Call Trace:
[44643.917109] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[44643.917128] [<c105bbd2>] ? irq_exit+0x62/0xa0
[44643.917149] [<c16998b3>] ? common_interrupt+0x33/0x38
[44643.917166] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[44643.917183] [<c168e733>] schedule+0x23/0x60
[44643.917236] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[44643.917252] [<c1094010>] ? __wake_up_sync+0x20/0x20
[44643.917280] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[44643.917300] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[44643.917329] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[44643.917350] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[44643.917367] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44643.917383] [<c1531e84>] md_thread+0xe4/0x110
[44643.917398] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[44643.917414] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44643.917430] [<c107625b>] kthread+0x9b/0xb0
[44643.917447] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[44643.917462] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[44763.916147] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[44763.916424] Not tainted 3.13.0-031300rc3-generic #201312061335
[44763.916668] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[44763.916964] md1_resync D c10a8e24 0 8767 2 0x00000000
[44763.916985] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[44763.917014] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[44763.917041] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[44763.917069] Call Trace:
[44763.917098] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[44763.917117] [<c105bbd2>] ? irq_exit+0x62/0xa0
[44763.917137] [<c16998b3>] ? common_interrupt+0x33/0x38
[44763.917154] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[44763.917171] [<c168e733>] schedule+0x23/0x60
[44763.917224] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[44763.917240] [<c1094010>] ? __wake_up_sync+0x20/0x20
[44763.917268] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[44763.917288] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[44763.917317] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[44763.917338] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[44763.917356] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44763.917371] [<c1531e84>] md_thread+0xe4/0x110
[44763.917386] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[44763.917402] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44763.917418] [<c107625b>] kthread+0x9b/0xb0
[44763.917435] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[44763.917451] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[44883.916180] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[44883.916457] Not tainted 3.13.0-031300rc3-generic #201312061335
[44883.916701] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[44883.916996] md1_resync D c10a8e24 0 8767 2 0x00000000
[44883.917017] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[44883.917047] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[44883.917074] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[44883.917101] Call Trace:
[44883.917130] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[44883.917150] [<c105bbd2>] ? irq_exit+0x62/0xa0
[44883.917170] [<c16998b3>] ? common_interrupt+0x33/0x38
[44883.917187] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[44883.917204] [<c168e733>] schedule+0x23/0x60
[44883.917257] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[44883.917273] [<c1094010>] ? __wake_up_sync+0x20/0x20
[44883.917301] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[44883.917321] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[44883.917350] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[44883.917371] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[44883.917388] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44883.917404] [<c1531e84>] md_thread+0xe4/0x110
[44883.917419] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[44883.917435] [<c1531da0>] ? md_rdev_init+0x100/0x100
[44883.917450] [<c107625b>] kthread+0x9b/0xb0
[44883.917468] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[44883.917483] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[45003.916166] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[45003.916445] Not tainted 3.13.0-031300rc3-generic #201312061335
[45003.916688] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[45003.916984] md1_resync D c10a8e24 0 8767 2 0x00000000
[45003.917005] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[45003.917035] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[45003.917062] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[45003.917089] Call Trace:
[45003.917118] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[45003.917137] [<c105bbd2>] ? irq_exit+0x62/0xa0
[45003.917157] [<c16998b3>] ? common_interrupt+0x33/0x38
[45003.917174] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[45003.917191] [<c168e733>] schedule+0x23/0x60
[45003.917244] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[45003.917260] [<c1094010>] ? __wake_up_sync+0x20/0x20
[45003.917288] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[45003.917308] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[45003.917337] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[45003.917357] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[45003.917375] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45003.917391] [<c1531e84>] md_thread+0xe4/0x110
[45003.917405] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[45003.917422] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45003.917437] [<c107625b>] kthread+0x9b/0xb0
[45003.917455] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[45003.917470] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[45123.916164] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[45123.916443] Not tainted 3.13.0-031300rc3-generic #201312061335
[45123.916687] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[45123.916983] md1_resync D c10a8e24 0 8767 2 0x00000000
[45123.917004] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[45123.917033] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[45123.917060] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[45123.917087] Call Trace:
[45123.917116] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[45123.917136] [<c105bbd2>] ? irq_exit+0x62/0xa0
[45123.917156] [<c16998b3>] ? common_interrupt+0x33/0x38
[45123.917173] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[45123.917190] [<c168e733>] schedule+0x23/0x60
[45123.917242] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[45123.917258] [<c1094010>] ? __wake_up_sync+0x20/0x20
[45123.917286] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[45123.917306] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[45123.917335] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[45123.917356] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[45123.917373] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45123.917389] [<c1531e84>] md_thread+0xe4/0x110
[45123.917404] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[45123.917420] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45123.917435] [<c107625b>] kthread+0x9b/0xb0
[45123.917453] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[45123.917468] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[45243.916159] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[45243.916438] Not tainted 3.13.0-031300rc3-generic #201312061335
[45243.916682] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[45243.916978] md1_resync D c10a8e24 0 8767 2 0x00000000
[45243.916998] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[45243.917028] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[45243.917055] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[45243.917082] Call Trace:
[45243.917111] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[45243.917130] [<c105bbd2>] ? irq_exit+0x62/0xa0
[45243.917151] [<c16998b3>] ? common_interrupt+0x33/0x38
[45243.917168] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[45243.917185] [<c168e733>] schedule+0x23/0x60
[45243.917237] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[45243.917253] [<c1094010>] ? __wake_up_sync+0x20/0x20
[45243.917281] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[45243.917301] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[45243.917330] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[45243.917351] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[45243.917368] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45243.917384] [<c1531e84>] md_thread+0xe4/0x110
[45243.917399] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[45243.917415] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45243.917431] [<c107625b>] kthread+0x9b/0xb0
[45243.917448] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[45243.917463] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[45363.916158] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[45363.916436] Not tainted 3.13.0-031300rc3-generic #201312061335
[45363.916679] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[45363.916975] md1_resync D c10a8e24 0 8767 2 0x00000000
[45363.916996] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[45363.917025] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[45363.917052] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[45363.917079] Call Trace:
[45363.917108] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[45363.917127] [<c105bbd2>] ? irq_exit+0x62/0xa0
[45363.917148] [<c16998b3>] ? common_interrupt+0x33/0x38
[45363.917165] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[45363.917181] [<c168e733>] schedule+0x23/0x60
[45363.917234] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[45363.917250] [<c1094010>] ? __wake_up_sync+0x20/0x20
[45363.917278] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[45363.917298] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[45363.917327] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[45363.917348] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[45363.917366] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45363.917381] [<c1531e84>] md_thread+0xe4/0x110
[45363.917396] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[45363.917412] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45363.917428] [<c107625b>] kthread+0x9b/0xb0
[45363.917446] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[45363.917461] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
[45483.916159] INFO: task md1_resync:8767 blocked for more than 120 seconds.
[45483.916436] Not tainted 3.13.0-031300rc3-generic #201312061335
[45483.916679] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[45483.916975] md1_resync D c10a8e24 0 8767 2 0x00000000
[45483.916996] ebc1bd5c 00000046 ebc1bce8 c10a8e24 00000092 20e0b127 00002833 c1af0400
[45483.917025] c105bbd2 c1af0400 f7bde400 e794b400 f7210d00 00000000 f6a8be48 ebc1bd1c
[45483.917052] ebc1bd30 f6a8be00 f6a8be48 ebc1bd70 ebc1bd90 c16998b3 00000082 e794b400
[45483.917080] Call Trace:
[45483.917109] [<c10a8e24>] ? irq_to_desc+0x14/0x20
[45483.917128] [<c105bbd2>] ? irq_exit+0x62/0xa0
[45483.917148] [<c16998b3>] ? common_interrupt+0x33/0x38
[45483.917165] [<c1093f31>] ? prepare_to_wait_event+0x71/0xd0
[45483.917182] [<c168e733>] schedule+0x23/0x60
[45483.917236] [<f8444e45>] raise_barrier+0x125/0x1c0 [raid1]
[45483.917251] [<c1094010>] ? __wake_up_sync+0x20/0x20
[45483.917279] [<f8444fab>] sync_request+0xcb/0xad0 [raid1]
[45483.917300] [<c1534b9f>] md_do_sync+0x9bf/0x1000
[45483.917329] [<f8444ee0>] ? raise_barrier+0x1c0/0x1c0 [raid1]
[45483.917349] [<c10653d7>] ? recalc_sigpending+0x17/0x50
[45483.917367] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45483.917383] [<c1531e84>] md_thread+0xe4/0x110
[45483.917397] [<c1093adf>] ? __wake_up_locked+0x1f/0x30
[45483.917414] [<c1531da0>] ? md_rdev_init+0x100/0x100
[45483.917429] [<c107625b>] kthread+0x9b/0xb0
[45483.917447] [<c1699337>] ret_from_kernel_thread+0x1b/0x28
[45483.917462] [<c10761c0>] ? flush_kthread_worker+0x90/0x90
--
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https://bugs.launchpad.net/bugs/1356558
Title:
BUG: soft lockup - CPU stuck for 22s! [md3_raid1]
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Hi,
this bug appeared in Ubuntu 14.04, Ubuntu 12.04 didn't show this behavior.
I've found a possible predecessor in bug #212684.
Switching to a recent mainline kernel didn't fix this issue.
Starting
$ /usr/share/mdadm/checkarray /dev/md3
will repeat this behavior.
/dev/md3 is a LVM PV:
--- Physical volume ---
PV Name /dev/md3
VG Name local_vg1
PV Size 1.36 TiB / not usable 2.25 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 355619
Free PE 31011
Allocated PE 324608
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-33-generic 3.13.0-33.58
ProcVersionSignature: Ubuntu 3.13.0-33.58-generic 3.13.11.4
Uname: Linux 3.13.0-33-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-33-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: i386
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Date: Wed Aug 13 21:42:12 2014
HibernationDevice: RESUME=UUID=c4a03c5e-f650-4ca8-9dab-f0c4ad12c901
InstallationDate: Installed on 2014-07-06 (37 days ago)
InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release i386 (20140416.2)
IwConfig:
lo no wireless extensions.
em1 no wireless extensions.
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-33-generic root=UUID=9c2715cb-dd8a-4687-9537-009e1e4e83d8 ro nomdmonddf nomdmonisw
RelatedPackageVersions:
linux-restricted-modules-3.13.0-33-generic N/A
linux-backports-modules-3.13.0-33-generic N/A
linux-firmware 1.127.5
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/19/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: JT94510H.86A.0045.2010.0519.1750
dmi.board.name: D945GSEJT
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE57850-300
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrJT94510H.86A.0045.2010.0519.1750:bd05/19/2010:svn:pn:pvr:rvnIntelCorporation:rnD945GSEJT:rvrAAE57850-300:cvn:ct3:cvr:
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References
