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Subject[ INFO: possible recursive locking detected ]
From
Date
Whoa!
should I been running only kvm-intel
without kqemu, or do both need to be loaded?
(this is from mounting my osx external drive, and then running
qemu on that drive)


[ 412.848254]
[ 412.848257] =============================================
[ 412.848264] [ INFO: possible recursive locking detected ]
[ 412.848270] 2.6.28-rc5-00018-ged82a0e #8
[ 412.848273] ---------------------------------------------
[ 412.848278] qemu-img/3166 is trying to acquire lock:
[ 412.848283] (&sb->s_type->i_mutex_key#10){--..}, at: [<f848e3eb>]
hfsplus_block_allocate+0x3d/0x2f6 [hfsplus]
[ 412.848308]
[ 412.848309] but task is already holding lock:
[ 412.848313] (&sb->s_type->i_mutex_key#10){--..}, at: [<c0176c3c>]
generic_file_aio_write+0x54/0xbd
[ 412.848330]
[ 412.848331] other info that might help us debug this:
[ 412.848337] 2 locks held by qemu-img/3166:
[ 412.848340] #0: (&sb->s_type->i_mutex_key#10){--..}, at:
[<c0176c3c>] generic_file_aio_write+0x54/0xbd
[ 412.848356] #1: (&HFSPLUS_I(inode).extents_lock){--..}, at:
[<f8489797>] hfsplus_file_extend+0x6e/0x1e8 [hfsplus]
[ 412.848378]
[ 412.848379] stack backtrace:
[ 412.848384] Pid: 3166, comm: qemu-img Not tainted
2.6.28-rc5-00018-ged82a0e #8
[ 412.848389] Call Trace:
[ 412.848399] [<c03e1f3b>] ? printk+0xf/0x14
[ 412.848408] [<c015b01c>] __lock_acquire+0xbff/0x1272
[ 412.848423] [<f8489797>] ? hfsplus_file_extend+0x6e/0x1e8 [hfsplus]
[ 412.848431] [<c015b676>] ? __lock_acquire+0x1259/0x1272
[ 412.848439] [<c0118dbe>] ? dump_trace+0xb7/0xeb
[ 412.848447] [<c015792c>] ? find_usage_backwards+0x33/0xea
[ 412.848454] [<c015b6ff>] lock_acquire+0x70/0x97
[ 412.848468] [<f848e3eb>] ? hfsplus_block_allocate+0x3d/0x2f6
[hfsplus]
[ 412.848476] [<c03e3202>] mutex_lock_nested+0xd2/0x26d
[ 412.848490] [<f848e3eb>] ? hfsplus_block_allocate+0x3d/0x2f6
[hfsplus]
[ 412.848504] [<f848e3eb>] ? hfsplus_block_allocate+0x3d/0x2f6
[hfsplus]
[ 412.848519] [<f848e3eb>] hfsplus_block_allocate+0x3d/0x2f6 [hfsplus]
[ 412.848526] [<c03e3395>] ? mutex_lock_nested+0x265/0x26d
[ 412.848541] [<f84897eb>] hfsplus_file_extend+0xc2/0x1e8 [hfsplus]
[ 412.848550] [<c01b3502>] ? create_empty_buffers+0x80/0x8b
[ 412.848564] [<f848999b>] hfsplus_get_block+0x8a/0x19b [hfsplus]
[ 412.848572] [<c01b4d0c>] __block_prepare_write+0x146/0x331
[ 412.848580] [<c0159c6f>] ? trace_hardirqs_on+0xb/0xd
[ 412.848589] [<c01754a4>] ? add_to_page_cache_locked+0x92/0x9b
[ 412.848597] [<c0175552>] ? __grab_cache_page+0x4d/0x6d
[ 412.848605] [<c01b505f>] block_write_begin+0x72/0xc9
[ 412.848618] [<f8489911>] ? hfsplus_get_block+0x0/0x19b [hfsplus]
[ 412.848627] [<c01b5305>] cont_write_begin+0x24f/0x27d
[ 412.848640] [<f8489911>] ? hfsplus_get_block+0x0/0x19b [hfsplus]
[ 412.848654] [<f8487fec>] hfsplus_write_begin+0x2d/0x32 [hfsplus]
[ 412.848668] [<f8489911>] ? hfsplus_get_block+0x0/0x19b [hfsplus]
[ 412.848683] [<c0175db0>] generic_file_buffered_write+0xcf/0x218
[ 412.848694] [<c01764b3>] __generic_file_aio_write_nolock+0x3cf/0x407
[ 412.848702] [<c0159a9a>] ? mark_held_locks+0x53/0x6a
[ 412.848709] [<c0159c3c>] ? trace_hardirqs_on_caller+0xf0/0x118
[ 412.848717] [<c0176c3c>] ? generic_file_aio_write+0x54/0xbd
[ 412.848726] [<c0176c51>] generic_file_aio_write+0x69/0xbd
[ 412.848735] [<c0199a15>] do_sync_write+0xab/0xe9
[ 412.848743] [<c014cb6b>] ? autoremove_wake_function+0x0/0x33
[ 412.848753] [<c021e93c>] ? selinux_file_permission+0x102/0x108
[ 412.848761] [<c0217cd4>] ? security_file_permission+0xf/0x11
[ 412.848768] [<c019996a>] ? do_sync_write+0x0/0xe9
[ 412.848774] [<c019a1da>] vfs_write+0x8a/0x104
[ 412.848781] [<c019a2ed>] sys_write+0x3b/0x60
[ 412.848789] [<c0116e27>] sysenter_do_call+0x12/0x3f
[ 412.848797] [<c0110000>] ? x86_emulate_insn+0x15df/0x3e27
[ 475.947913] QEMU Accelerator Module version 1.3.0, Copyright (c)
2005-2007 Fabrice Bellard
[ 475.948081] KQEMU installed, max_locked_mem=506216kB.




--
Justin P. Mattock <justinmattock@gmail.com>



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