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SubjectRe: boot failure, "DWARF2 unwinder stuck at 0xc0100199"
Date

Thanks for the test cases. If you have more keep them comming.

> Call Trace:
> [<ffffffff80284179>] ll_rw_block+0x79/0xd0
> [<ffffffff8030e868>] journal_commit_transaction+0x478/0x1170
> [<ffffffff80312c8e>] kjournald+0xde/0x290
> [<ffffffff8024562c>] kthread+0xdc/0x110
> [<ffffffff8020abe2>] child_rip+0x8/0x12
> DWARF2 unwinder stuck at child_rip+0x8/0x12
> Leftover inexact backtrace:
> [<ffffffff80245550>] kthread+0x0/0x110
> [<ffffffff8020abda>] child_rip+0x0/0x12

I submitted Jan's patch to fix that one for .18, but Linus hasn't merged it
yet.



> [<ffffffff8027fbbc>] kfree+0x26/0x1f2
> [<ffffffff80304110>] do_get_write_access+0x52e/0x54f
> [<ffffffff803051a3>] journal_get_undo_access+0x2e/0x118
> [<ffffffff802f0a0c>] ext3_try_to_allocate_with_rsv+0x4b/0x504
> [<ffffffff802f117e>] ext3_new_blocks+0x2b9/0x74e
> [<ffffffff802f46d3>] ext3_get_blocks_handle+0x467/0xac4
> [<ffffffff802f5095>] ext3_get_block+0xc4/0xec
> [<ffffffff8028795c>] __block_prepare_write+0x1bf/0x41e
> [<ffffffff80287bdd>] block_prepare_write+0x22/0x30
> [<ffffffff802f660f>] ext3_prepare_write+0xb5/0x185
> [<ffffffff8025fbc3>] generic_file_buffered_write+0x2c7/0x6b7
> [<ffffffff80260298>] __generic_file_aio_write_nolock+0x2e5/0x331
> [<ffffffff8026034d>] generic_file_aio_write+0x69/0xc4
> [<ffffffff802f21a6>] ext3_file_write+0x1e/0x9b
> [<ffffffff80284804>] do_sync_write+0xf0/0x12e
> [<ffffffff80285197>] vfs_write+0xcf/0x175
> [<ffffffff8028577f>] sys_write+0x47/0x70
> [<ffffffff8020988e>] system_call+0x7e/0x83
> DWARF2 unwinder stuck at system_call+0x7e/0x83

This one will be fixed in .19 only


> Leftover inexact backtrace:
>
>
> Code: 0f 0b 68 ae 3c 4a 80 c2 8a 0a 58 5b c9 c3 55 48 89 e5 41 57
> RIP [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8
> RSP <ffff81010d9ad5b8>
> <3>BUG: sleeping function called from invalid context at
> kernel/rwsem.c:20
> in_atomic():0, irqs_disabled():1
>
> Call Trace:
> [<ffffffff8020ad7f>] show_trace+0xae/0x30e
> [<ffffffff8020aff4>] dump_stack+0x15/0x17
> [<ffffffff802288a5>] __might_sleep+0xb2/0xb4
> [<ffffffff8024750e>] down_read+0x1d/0x2f
> [<ffffffff8023e674>] blocking_notifier_call_chain+0x1b/0x41
> [<ffffffff80232511>] profile_task_exit+0x15/0x17
> [<ffffffff80233f95>] do_exit+0x25/0x91e
> [<ffffffff8020b222>] kernel_math_error+0x0/0x96
> [<ffff81010b6a30c0>]


Hmm, not sure about that one. In theory it should have been fixed
in rc4 already. Was this from an earlier kernel?

> DWARF2 unwinder stuck at 0xffff81010b6a30c0
> Leftover inexact backtrace:
> [<ffffffff80471079>] do_trap+0xe0/0xef
> [<ffffffff8020b82d>] do_invalid_op+0xa7/0xb3
> [<ffffffff8027de3d>] kfree_debugcheck+0x9a/0xa8


-Andi
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