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Date: Wed, 6 Jan 2010 07:54:59 -0500
From: Miles Lane <miles.lane@...il.com>
To: LKML <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...e.de>,
Jesse Barnes <jbarnes@...tuousgeek.org>,
Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
"Rafael J. Wysocki" <rjw@...k.pl>
Subject: 2.6.33-rc3 -- INFO: possible recursive locking -- (s_active){++++.+},
at: [<c10d2941>] sysfs_hash_and_remove+0x3d/0x4f
[ 6967.926563] ACPI: Preparing to enter system sleep state S3
[ 6967.956156] Disabling non-boot CPUs ...
[ 6967.970401]
[ 6967.970408] =============================================
[ 6967.970419] [ INFO: possible recursive locking detected ]
[ 6967.970431] 2.6.33-rc2-git6 #27
[ 6967.970439] ---------------------------------------------
[ 6967.970450] pm-suspend/22147 is trying to acquire lock:
[ 6967.970460] (s_active){++++.+}, at: [<c10d2941>]
sysfs_hash_and_remove+0x3d/0x4f
[ 6967.970493]
[ 6967.970497] but task is already holding lock:
[ 6967.970506] (s_active){++++.+}, at: [<c10d4110>]
sysfs_get_active_two+0x16/0x36
[ 6967.970531]
[ 6967.970535] other info that might help us debug this:
[ 6967.970547] 6 locks held by pm-suspend/22147:
[ 6967.970556] #0: (&buffer->mutex){+.+.+.}, at: [<c10d2ff3>]
sysfs_write_file+0x25/0xeb
[ 6967.970584] #1: (s_active){++++.+}, at: [<c10d4110>]
sysfs_get_active_two+0x16/0x36
[ 6967.970612] #2: (s_active){++++.+}, at: [<c10d411b>]
sysfs_get_active_two+0x21/0x36
[ 6967.970639] #3: (pm_mutex){+.+.+.}, at: [<c1056f00>] enter_state+0x26/0x114
[ 6967.970668] #4: (cpu_add_remove_lock){+.+.+.}, at: [<c102ea10>]
cpu_maps_update_begin+0xf/0x11
[ 6967.970697] #5: (cpu_hotplug.lock){+.+.+.}, at: [<c102ea3e>]
cpu_hotplug_begin+0x1d/0x40
[ 6967.970724]
[ 6967.970728] stack backtrace:
[ 6967.970740] Pid: 22147, comm: pm-suspend Not tainted 2.6.33-rc2-git6 #27
[ 6967.970751] Call Trace:
[ 6967.970771] [<c12cc9bf>] ? printk+0xf/0x18
[ 6967.970791] [<c104dcdb>] __lock_acquire+0x817/0xb6d
[ 6967.970812] [<c104cbb2>] ? mark_held_locks+0x43/0x5b
[ 6967.970831] [<c104cf4c>] ? debug_check_no_locks_freed+0xfd/0x107
[ 6967.970851] [<c104ce1a>] ? trace_hardirqs_on_caller+0x108/0x130
[ 6967.970871] [<c104e08d>] lock_acquire+0x5c/0x73
[ 6967.970890] [<c10d2941>] ? sysfs_hash_and_remove+0x3d/0x4f
[ 6967.970910] [<c10d3ee6>] sysfs_addrm_finish+0x9a/0xfe
[ 6967.970929] [<c10d2941>] ? sysfs_hash_and_remove+0x3d/0x4f
[ 6967.970953] [<c10d2941>] sysfs_hash_and_remove+0x3d/0x4f
[ 6967.970974] [<c10d4c11>] sysfs_remove_group+0x52/0x81
[ 6967.970993] [<c12cab5d>] mc_cpu_callback+0x73/0x9a
[ 6967.971014] [<c10427d0>] notifier_call_chain+0x51/0x78
[ 6967.971034] [<c104285c>] __raw_notifier_call_chain+0xe/0x10
[ 6967.971054] [<c12c094b>] _cpu_down+0x7a/0x235
[ 6967.971074] [<c102eab9>] disable_nonboot_cpus+0x58/0xe0
[ 6967.971093] [<c1056e20>] suspend_devices_and_enter+0xb9/0x173
[ 6967.971094] [<c1056fa2>] enter_state+0xc8/0x114
[ 6967.971094] [<c1056855>] state_store+0x93/0xa7
[ 6967.971094] [<c10567c2>] ? state_store+0x0/0xa7
[ 6967.971094] [<c1140595>] kobj_attr_store+0x16/0x22
[ 6967.971094] [<c10d308e>] sysfs_write_file+0xc0/0xeb
[ 6967.971094] [<c10d2fce>] ? sysfs_write_file+0x0/0xeb
[ 6967.971094] [<c109511c>] vfs_write+0x80/0xdf
[ 6967.971094] [<c109520f>] sys_write+0x3b/0x5d
[ 6967.971094] [<c1002897>] sysenter_do_call+0x12/0x36
[ 6967.973262] CPU 1 is now offline
[ 6967.973271] lockdep: fixing up alternatives.
--
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