[ 59.677312] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state
recovery directory
[ 59.688633] NFSD: starting 90-second grace period
[ 60.221454]
[ 60.221456] =============================================
[ 60.221461] [ INFO: possible recursive locking detected ]
[ 60.221464] 2.6.21-rc7-mm1 #53
[ 60.221466] ---------------------------------------------
[ 60.221469] S20powernowd/3584 is trying to acquire lock:
[ 60.221472] (&sd->s_active){----}, at: [<c01a2436>]
sysfs_hash_and_remove+0x91/0x10e
[ 60.221486]
[ 60.221487] but task is already holding lock:
[ 60.221489] (&sd->s_active){----}, at: [<c01a2a20>]
sysfs_write_file+0xb9/0x14a
[ 60.221496]
[ 60.221497] other info that might help us debug this:
[ 60.221499] 4 locks held by S20powernowd/3584:
[ 60.221501] #0: (&sd->s_active){----}, at: [<c01a2a20>]
sysfs_write_file+0xb9/0x14a
[ 60.221508] #1: (&sd->s_active){----}, at: [<c01a2a32>]
sysfs_write_file+0xcb/0x14a
[ 60.221515] #2: (&per_cpu(cpu_policy_rwsem, cpu)){--..}, at:
[<c024081b>] lock_policy_rwsem_write+0x20/0x37
[ 60.221524] #3: (userspace_mutex){--..}, at: [<c0299dfe>]
mutex_lock+0x1f/0x23
[ 60.221534]
[ 60.221535] stack backtrace:
[ 60.221538] [<c0104e0f>] show_trace_log_lvl+0x1a/0x30
[ 60.221543] [<c0105a26>] show_trace+0x12/0x14
[ 60.221547] [<c0105ab3>] dump_stack+0x16/0x18
[ 60.221551] [<c0134d63>] __lock_acquire+0x12e/0xb4c
[ 60.221557] [<c01357e9>] lock_acquire+0x68/0x82
[ 60.221561] [<c012ddda>] down_write+0x3a/0x53
[ 60.221567] [<c01a2436>] sysfs_hash_and_remove+0x91/0x10e
[ 60.221571] [<c01a2bb0>] sysfs_remove_file+0x10/0x12
[ 60.221575] [<c0241756>] cpufreq_governor_userspace+0x10c/0x1dc
[ 60.221579] [<c023fd2b>] __cpufreq_governor+0x9c/0xd0
[ 60.221583] [<c023fed0>] __cpufreq_set_policy+0x171/0x209
[ 60.221587] [<c02400b5>] store_scaling_governor+0x14d/0x184
[ 60.221591] [<c0240bee>] store+0x3e/0x60
[ 60.221594] [<c01a2a85>] sysfs_write_file+0x11e/0x14a
[ 60.221599] [<c01699fb>] vfs_write+0x90/0x119
[ 60.221605] [<c0169eef>] sys_write+0x3d/0x61
[ 60.221609] [<c0103e66>] sysenter_past_esp+0x5f/0x99
[ 60.221613] =======================
[ 60.763809] Clocksource tsc unstable (delta = -75646443 ns)
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