After installing .2356 I get this each time I boot:
=======================================================
[ INFO: possible circular locking dependency detected ]
-------------------------------------------------------
S06cpuspeed/1620 is trying to acquire lock:
(dbs_mutex){--..}, at: [<c060d6bb>] mutex_lock+0x21/0x24
but task is already holding lock:
(cpucontrol){--..}, at: [<c060d6bb>] mutex_lock+0x21/0x24
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (cpucontrol){--..}:
[<c043c546>] lock_acquire+0x4b/0x6d
[<c060d51e>] __mutex_lock_slowpath+0xbf/0x23b
[<c060d6bb>] mutex_lock+0x21/0x24
[<c0440009>] __lock_cpu_hotplug+0x36/0x56
[<c0440042>] lock_cpu_hotplug+0xa/0xc
[<c04337de>] __create_workqueue+0x52/0x168
[<f8e6b32e>] cpufreq_governor_dbs+0x9e/0x2cb [cpufreq_ondemand]
[<c05a724b>] __cpufreq_governor+0x57/0xd8
[<c05a7409>] __cpufreq_set_policy+0x13d/0x1a9
[<c05a760c>] store_scaling_governor+0x128/0x151
[<c05a6c67>] store+0x37/0x48
[<c04ab4cc>] sysfs_write_file+0xab/0xd1
[<c047248b>] vfs_write+0xab/0x157
[<c0472ace>] sys_write+0x3b/0x60
[<c0403f2f>] syscall_call+0x7/0xb
-> #0 (dbs_mutex){--..}:
[<c043c546>] lock_acquire+0x4b/0x6d
[<c060d51e>] __mutex_lock_slowpath+0xbf/0x23b
[<c060d6bb>] mutex_lock+0x21/0x24
[<f8e6b503>] cpufreq_governor_dbs+0x273/0x2cb [cpufreq_ondemand]
[<c05a724b>] __cpufreq_governor+0x57/0xd8
[<c05a7463>] __cpufreq_set_policy+0x197/0x1a9
[<c05a760c>] store_scaling_governor+0x128/0x151
[<c05a6c67>] store+0x37/0x48
[<c04ab4cc>] sysfs_write_file+0xab/0xd1
[<c047248b>] vfs_write+0xab/0x157
[<c0472ace>] sys_write+0x3b/0x60
[<c0403f2f>] syscall_call+0x7/0xb
other info that might help us debug this:
2 locks held by S06cpuspeed/1620:
#0: (&policy->lock){--..}, at: [<c060d6bb>] mutex_lock+0x21/0x24
#1: (cpucontrol){--..}, at: [<c060d6bb>] mutex_lock+0x21/0x24
stack backtrace:
[<c0405167>] show_trace_log_lvl+0x54/0xfd
[<c040571e>] show_trace+0xd/0x10
[<c040583d>] dump_stack+0x19/0x1b
[<c043b63d>] print_circular_bug_tail+0x59/0x64
[<c043be35>] __lock_acquire+0x7ed/0x98d
[<c043c546>] lock_acquire+0x4b/0x6d
[<c060d51e>] __mutex_lock_slowpath+0xbf/0x23b
[<c060d6bb>] mutex_lock+0x21/0x24
[<f8e6b503>] cpufreq_governor_dbs+0x273/0x2cb [cpufreq_ondemand]
[<c05a724b>] __cpufreq_governor+0x57/0xd8
[<c05a7463>] __cpufreq_set_policy+0x197/0x1a9
[<c05a760c>] store_scaling_governor+0x128/0x151
[<c05a6c67>] store+0x37/0x48
[<c04ab4cc>] sysfs_write_file+0xab/0xd1
[<c047248b>] vfs_write+0xab/0x157
[<c0472ace>] sys_write+0x3b/0x60
[<c0403f2f>] syscall_call+0x7/0xb
BZ'ed here: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=197803
tom
--
Tom London
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