Kernel errors on Ubuntu 10.04 LTS

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What steps will reproduce the problem?
1. Running on Ubuntu 10.04 LTS, 2.6.32-40-generic

What is the expected output? What do you see instead?
Appears to be working, but causes kernel errors.

 * spindown is running
name     watched     active       idle-time        spindown-time
sda            1          1              17                 3600
sdb            1          0           81459                 3600

What version of the product are you using? On what operating system?
0.4.0

Please provide any additional information below.

ar 25 01:03:01 homer kernel: [33961.800555] INFO: task spindownd:2932 blocked 
for more than 120 seconds.
Mar 25 01:03:01 homer kernel: [33961.800560] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 25 01:03:01 homer kernel: [33961.800563] spindownd     D 000a0a18     0  
2932      1 0x00000000
Mar 25 01:03:01 homer kernel: [33961.800569]  e4d13e90 00000082 00000000 
000a0a18 00000000 c084e760 e7dddbe4 c084e760
Mar 25 01:03:01 homer kernel: [33961.800579]  f0d17571 00001ebe c084e760 
c084e760 e7dddbe4 c084e760 c084e760 e5b53640
Mar 25 01:03:01 homer kernel: [33961.800587]  f0cd64ae 00001ebe e7ddd940 
7fffffff 7fffffff e4d13f64 e4d13ef0 c058fe8d
Mar 25 01:03:01 homer kernel: [33961.800596] Call Trace:
Mar 25 01:03:01 homer kernel: [33961.800618]  [<c058fe8d>] 
schedule_timeout+0x1ad/0x280
Mar 25 01:03:01 homer kernel: [33961.800622]  [<c016e665>] ? 
sched_clock_cpu+0x65/0x160
Mar 25 01:03:01 homer kernel: [33961.800625]  [<c058fb46>] 
wait_for_common+0xa6/0x130
Mar 25 01:03:01 homer kernel: [33961.800629]  [<c0145e30>] ? 
default_wake_function+0x0/0x20
Mar 25 01:03:01 homer kernel: [33961.800632]  [<c058fc87>] 
wait_for_completion+0x17/0x20
Mar 25 01:03:01 homer kernel: [33961.800635]  [<c0228925>] 
writeback_inodes_sb+0x95/0xc0
Mar 25 01:03:01 homer kernel: [33961.800638]  [<c05904b9>] ? 
mutex_lock+0x19/0x40
Mar 25 01:03:01 homer kernel: [33961.800641]  [<c022cb68>] 
__sync_filesystem+0x38/0x80
Mar 25 01:03:01 homer kernel: [33961.800644]  [<c022cc8e>] 
sync_filesystems+0xde/0x110
Mar 25 01:03:01 homer kernel: [33961.800647]  [<c022cd16>] sys_sync+0x16/0x40
Mar 25 01:03:01 homer kernel: [33961.800650]  [<c01033ec>] syscall_call+0x7/0xb
Mar 25 01:05:01 homer kernel: [34081.800554] INFO: task spindownd:2932 blocked 
for more than 120 seconds.
Mar 25 01:05:01 homer kernel: [34081.800558] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 25 01:05:01 homer kernel: [34081.800562] spindownd     D 000a0a18     0  
2932      1 0x00000000
Mar 25 01:05:01 homer kernel: [34081.800568]  e4d13e90 00000082 00000000 
000a0a18 00000000 c084e760 e7dddbe4 c084e760
Mar 25 01:05:01 homer kernel: [34081.800577]  f0d17571 00001ebe c084e760 
c084e760 e7dddbe4 c084e760 c084e760 e5b53640
Mar 25 01:05:01 homer kernel: [34081.800586]  f0cd64ae 00001ebe e7ddd940 
7fffffff 7fffffff e4d13f64 e4d13ef0 c058fe8d
Mar 25 01:05:01 homer kernel: [34081.800594] Call Trace:
Mar 25 01:05:01 homer kernel: [34081.800604]  [<c058fe8d>] 
schedule_timeout+0x1ad/0x280
Mar 25 01:05:01 homer kernel: [34081.800609]  [<c016e665>] ? 
sched_clock_cpu+0x65/0x160
Mar 25 01:05:01 homer kernel: [34081.800614]  [<c058fb46>] 
wait_for_common+0xa6/0x130
Mar 25 01:05:01 homer kernel: [34081.800619]  [<c0145e30>] ? 
default_wake_function+0x0/0x20
Mar 25 01:05:01 homer kernel: [34081.800623]  [<c058fc87>] 
wait_for_completion+0x17/0x20
Mar 25 01:05:01 homer kernel: [34081.800628]  [<c0228925>] 
writeback_inodes_sb+0x95/0xc0
Mar 25 01:05:01 homer kernel: [34081.800632]  [<c05904b9>] ? 
mutex_lock+0x19/0x40
Mar 25 01:05:01 homer kernel: [34081.800637]  [<c022cb68>] 
__sync_filesystem+0x38/0x80
Mar 25 01:05:01 homer kernel: [34081.800647]  [<c022cc8e>] 
sync_filesystems+0xde/0x110
Mar 25 01:05:01 homer kernel: [34081.800650]  [<c022cd16>] sys_sync+0x16/0x40
Mar 25 01:05:01 homer kernel: [34081.800652]  [<c01033ec>] syscall_call+0x7/0xb

Original issue reported on code.google.com by [email protected] on 25 Mar 2012 at 6:17