Hi,
The problem log is attached below. It happened with current 2.6.30-rc6 kernel.
It happens with heavy disk IO. It is easy to trigger with kernel compilation in
one
console and git operations on the same tree in another.
Regards,
Krzysztof
=================================
[ INFO: inconsistent lock state ]
2.6.30-rc6 #60
---------------------------------
inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
kswapd0/181 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&jfs_ip->rdwrlock#2){++++?+}, at: [<c02d8d47>] jfs_get_block+0x47/0x280
{RECLAIM_FS-ON-W} state was registered at:
[<c0241c95>] mark_held_locks+0x55/0x70
[<c02421e6>] lockdep_trace_alloc+0x86/0xb0
[<c0278cc1>] kmem_cache_alloc+0x21/0xe0
[<c031650b>] radix_tree_preload+0x1b/0x60
[<c0257351>] add_to_page_cache_locked+0x21/0xb0
[<c0257408>] add_to_page_cache_lru+0x28/0x70
[<c02575a8>] read_cache_page_async+0xa8/0x140
[<c0257652>] read_cache_page+0x12/0x60
[<c02f176e>] __get_metapage+0x10e/0x3f0
[<c02e699d>] dbAllocAG+0x12d/0x490
[<c02e717b>] dbAlloc+0x1fb/0x590
[<c02f05e3>] extAlloc+0x1f3/0x5c0
[<c02d8f27>] jfs_get_block+0x227/0x280
[<c029d130>] nobh_write_begin+0x130/0x3e0
[<c02d876d>] jfs_write_begin+0x3d/0x50
[<c02579d2>] generic_file_buffered_write+0xe2/0x2a0
[<c0257fe4>] __generic_file_aio_write_nolock+0x244/0x4a0
[<c0258506>] generic_file_aio_write+0x66/0xe0
[<c027c66c>] do_sync_write+0xcc/0x110
[<c027cf26>] vfs_write+0x96/0x140
[<c027d3cd>] sys_write+0x3d/0x70
[<c0202c65>] syscall_call+0x7/0xb
[<ffffffff>] 0xffffffff
irq event stamp: 852417
hardirqs last enabled at (852417): [<c0278d3b>] kmem_cache_alloc+0x9b/0xe0
hardirqs last disabled at (852416): [<c0278ccf>] kmem_cache_alloc+0x2f/0xe0
softirqs last enabled at (851380): [<c0225201>] __do_softirq+0xb1/0x100
softirqs last disabled at (851371): [<c0225296>] do_softirq+0x46/0x50
other info that might help us debug this:
no locks held by kswapd0/181.
stack backtrace:
Pid: 181, comm: kswapd0 Tainted: G W 2.6.30-rc6 #60
Call Trace:
[<c0241646>] print_usage_bug+0x166/0x1b0
[<c0241c05>] mark_lock+0x575/0x5b0
[<c0243169>] ? validate_chain+0xe9/0xfd0
[<c02455e0>] ? check_usage_forwards+0x0/0xa0
[<c02444a0>] __lock_acquire+0x450/0x9e0
[<c0244aa4>] lock_acquire+0x74/0xa0
[<c02d8d47>] ? jfs_get_block+0x47/0x280
[<c02375ae>] down_write_nested+0x4e/0x70
[<c02d8d47>] ? jfs_get_block+0x47/0x280
[<c02d8d47>] jfs_get_block+0x47/0x280
[<c044e41d>] ? _spin_unlock+0x1d/0x20
[<c029a287>] ? create_empty_buffers+0x77/0x90
[<c029bb63>] __block_write_full_page+0xe3/0x310
[<c02d8d00>] ? jfs_get_block+0x0/0x280
[<c029be57>] block_write_full_page_endio+0xc7/0xe0
[<c029cac0>] ? end_buffer_async_write+0x0/0x160
[<c02d8d00>] ? jfs_get_block+0x0/0x280
[<c0241de2>] ? trace_hardirqs_on_caller+0x132/0x180
[<c029be82>] block_write_full_page+0x12/0x20
[<c029cac0>] ? end_buffer_async_write+0x0/0x160
[<c02d87df>] jfs_writepage+0xf/0x20
[<c02612ff>] shrink_page_list+0x30f/0x630
[<c02605c0>] ? isolate_pages_global+0x0/0x1f0
[<c02617da>] shrink_list+0x1ba/0x490
[<c0244309>] ? __lock_acquire+0x2b9/0x9e0
[<c0261d18>] shrink_zone+0x268/0x2e0
[<c02626b6>] kswapd+0x4d6/0x510
[<c02605c0>] ? isolate_pages_global+0x0/0x1f0
[<c02339d0>] ? autoremove_wake_function+0x0/0x40
[<c02621e0>] ? kswapd+0x0/0x510
[<c023372a>] kthread+0x4a/0x80
[<c02336e0>] ? kthread+0x0/0x80
[<c0203477>] kernel_thread_helper+0x7/0x10
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