root@dimitar:~$ echo w > /proc/sysrq-trigger
SysRq : Show Blocked State
free sibling
task PC stack pid father child younger older
kjournald D C0284784 0 408 6 (L-TLB)
[<c0284240>] (schedule+0x0/0x64c) from [<c00f8724>] (journal_commit_transaction+0x16c/0x1568)
[<c00f85b8>] (journal_commit_transaction+0x0/0x1568) from [<c00fd99c>] (kjournald+0xbc/0x260)
[<c00fd8e0>] (kjournald+0x0/0x260) from [<c0070d9c>] (kthread+0xe8/0x128)
[<c0070cb4>] (kthread+0x0/0x128) from [<c005d980>] (do_exit+0x0/0x8c8)
r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000
fautotest D C0284784 0 1184 665 (NOTLB)
[<c0284240>] (schedule+0x0/0x64c) from [<c02852ec>] (io_schedule+0x34/0x58)
[<c02852b8>] (io_schedule+0x0/0x58) from [<c00c7f3c>] (sync_buffer+0x4c/0x54)
r4 = C3E21BDC
[<c00c7ef0>] (sync_buffer+0x0/0x54) from [<c0285694>] (__wait_on_bit_lock+0x60/0x94)
[<c0285634>] (__wait_on_bit_lock+0x0/0x94) from [<c0285744>] (out_of_line_wait_on_bit_lock+0x7c/0x88)
r8 = C3F8F400 r7 = 00000002 r6 = C00C7EF0 r5 = C0000070
r4 = C3E21BF0
[<c02856c8>] (out_of_line_wait_on_bit_lock+0x0/0x88) from [<c00c8178>] (__lock_buffer+0x40/0x48)
[<c00c8138>] (__lock_buffer+0x0/0x48) from [<c00f6434>] (do_get_write_access+0x78/0x5a0)
[<c00f63bc>] (do_get_write_access+0x0/0x5a0) from [<c00f6988>] (journal_get_write_access+0x2c/0x40)
[<c00f695c>] (journal_get_write_access+0x0/0x40) from [<c00f3bf0>] (__ext3_journal_get_write_access+0x28/0x58)
r5 = C3F8F400 r4 = D268C3B0
[<c00f3bc8>] (__ext3_journal_get_write_access+0x0/0x58) from [<c00e85bc>] (ext3_reserve_inode_write+0x44/0x80)
r7 = C3452CB8 r6 = 00000000 r5 = D268C3B0 r4 = C3E21CF4
[<c00e8578>] (ext3_reserve_inode_write+0x0/0x80) from [<c00e861c>] (ext3_mark_inode_dirty+0x24/0x4c)
r7 = C3E86600 r6 = C3E21CF4 r5 = D268C3B0 r4 = C3452CB8
[<c00e85f8>] (ext3_mark_inode_dirty+0x0/0x4c) from [<c00eb57c>] (ext3_dirty_inode+0x6c/0x84)
r6 = C3452CB8 r5 = 00000000 r4 = D268C3B0
[<c00eb510>] (ext3_dirty_inode+0x0/0x84) from [<c00c36fc>] (__mark_inode_dirty+0x38/0x1a8)
r6 = 0019F1B9 r5 = 00000001 r4 = C3452CB8
[<c00c36c4>] (__mark_inode_dirty+0x0/0x1a8) from [<c00b96e8>] (file_update_time+0x9c/0xc4)
r8 = C3452CB8 r7 = 00000000 r6 = 0019F1B9 r5 = 00000000
r4 = C3452CB8
[<c00b964c>] (file_update_time+0x0/0xc4) from [<c0082edc>] (__generic_file_aio_write_nolock+0x3f0/0x598)
r5 = FFFFFFFF r4 = C3E20000
[<c0082aec>] (__generic_file_aio_write_nolock+0x0/0x598) from [<c00830fc>] (generic_file_aio_write+0x78/0xf4)
[<c0083084>] (generic_file_aio_write+0x0/0xf4) from [<c00e69f0>] (ext3_file_write+0x28/0xa8)
[<c00e69c8>] (ext3_file_write+0x0/0xa8) from [<c00a303c>] (do_sync_write+0xb0/0x100)
r7 = 00000122 r6 = C3E21F78 r5 = D3BB29E0 r4 = C3E21E98
[<c00a2f8c>] (do_sync_write+0x0/0x100) from [<c00a3948>] (vfs_write+0xb8/0x148)
r6 = C3E21F78 r5 = 4001C000 r4 = D3BB29E0
[<c00a3890>] (vfs_write+0x0/0x148) from [<c00a3f24>] (sys_write+0x44/0x70)
r7 = 00000000 r6 = 0019F1B9 r5 = FFFFFFF7 r4 = D3BB29E0
[<c00a3ee0>] (sys_write+0x0/0x70) from [<c0033ca0>] (ret_fast_syscall+0x0/0x2c)
r7 = 00000004 r6 = 4001C000 r5 = 00000122 r4 = 0032EB68
FusionId D C0284784 0 4653 665 (NOTLB)
[<c0284240>] (schedule+0x0/0x64c) from [<c02852ec>] (io_schedule+0x34/0x58)
[<c02852b8>] (io_schedule+0x0/0x58) from [<c0080c30>] (sync_page+0x50/0x5c)
r4 = D23C1E34
[<c0080be0>] (sync_page+0x0/0x5c) from [<c02857b4>] (__wait_on_bit+0x64/0xac)
[<c0285750>] (__wait_on_bit+0x0/0xac) from [<c0080ee8>] (wait_on_page_bit+0x98/0xa8)
[<c0080e50>] (wait_on_page_bit+0x0/0xa8) from [<c0081c3c>] (wait_on_page_writeback_range+0x6c/0x134)
r6 = D23C1E80 r5 = 00000001 r4 = C03DA2A0
[<c0081bd0>] (wait_on_page_writeback_range+0x0/0x134) from [<c0081d74>] (filemap_fdatawait+0x70/0x7c)
[<c0081d04>] (filemap_fdatawait+0x0/0x7c) from [<c00820d8>] (filemap_write_and_wait+0x38/0x48)
r8 = 00000000 r7 = 00000001 r6 = D23C0000 r5 = C0406140
r4 = 00000000
[<c00820a0>] (filemap_write_and_wait+0x0/0x48) from [<c00c7d60>] (sync_blockdev+0x24/0x30)
r5 = C3E86640 r4 = C3E86600
[<c00c7d3c>] (sync_blockdev+0x0/0x30) from [<c00c35cc>] (__sync_inodes+0x90/0xf4)
[<c00c353c>] (__sync_inodes+0x0/0xf4) from [<c00c3654>] (sync_inodes+0x24/0x40)
r8 = C0033E48 r7 = 00000024 r6 = 41E08264 r5 = 00000005
r4 = 00000000
[<c00c3630>] (sync_inodes+0x0/0x40) from [<c00c61cc>] (do_sync+0x24/0x70)
r4 = 00000001
[<c00c61a8>] (do_sync+0x0/0x70) from [<c00c622c>] (sys_sync+0x14/0x1c)
r4 = 0037AAD8
[<c00c6218>] (sys_sync+0x0/0x1c) from [<c0033ca0>] (ret_fast_syscall+0x0/0x2c)
pdflush D C0284784 0 32228 6 (L-TLB)
[<c0284240>] (schedule+0x0/0x64c) from [<c02852ec>] (io_schedule+0x34/0x58)
[<c02852b8>] (io_schedule+0x0/0x58) from [<c0130474>] (get_request_wait+0xc0/0x120)
r4 = D2611C14
[<c01303b4>] (get_request_wait+0x0/0x120) from [<c01316b8>] (__make_request+0x430/0x614)
[<c0131288>] (__make_request+0x0/0x614) from [<c012f1a8>] (generic_make_request+0x180/0x198)
[<c012f028>] (generic_make_request+0x0/0x198) from [<c0131f3c>] (submit_bio+0x110/0x134)
r8 = C04060A8 r7 = D2610038 r6 = 00000008 r5 = 00000001
r4 = C034E3C0
[<c0131e2c>] (submit_bio+0x0/0x134) from [<c00c6f34>] (submit_bh+0x15c/0x18c)
[<c00c6dd8>] (submit_bh+0x0/0x18c) from [<c00c8bb4>] (__block_write_full_page+0x2cc/0x47c)
r6 = C3F8F400 r5 = C03DA2A0 r4 = C3F8F400
[<c00c88e8>] (__block_write_full_page+0x0/0x47c) from [<c00c8ddc>] (block_write_full_page+0x78/0x130)
[<c00c8d64>] (block_write_full_page+0x0/0x130) from [<c00cca78>] (blkdev_writepage+0x18/0x20)
[<c00cca60>] (blkdev_writepage+0x0/0x20) from [<c0087248>] (generic_writepages+0x1dc/0x37c)
[<c008706c>] (generic_writepages+0x0/0x37c) from [<c008742c>] (do_writepages+0x44/0x64)
[<c00873e8>] (do_writepages+0x0/0x64) from [<c00c2e1c>] (__writeback_single_inode+0x1e0/0x3ac)
r4 = 00000004
[<c00c2c3c>] (__writeback_single_inode+0x0/0x3ac) from [<c00c3394>] (sync_sb_inodes+0x1e4/0x2d0)
[<c00c31b0>] (sync_sb_inodes+0x0/0x2d0) from [<c00c3910>] (writeback_inodes+0xa4/0x120)
[<c00c386c>] (writeback_inodes+0x0/0x120) from [<c008791c>] (background_writeout+0xa0/0xdc)
r7 = C032ABF0 r6 = 00000001 r5 = 00000001 r4 = D2610000
[<c008787c>] (background_writeout+0x0/0xdc) from [<c0088188>] (pdflush+0x16c/0x260)
r5 = D2611F9C r4 = D2610000
[<c008801c>] (pdflush+0x0/0x260) from [<c0070d9c>] (kthread+0xe8/0x128)
r8 = 00000000 r7 = C008801C r6 = C048FF24 r5 = D2610000
r4 = 00000000
[<c0070cb4>] (kthread+0x0/0x128) from [<c005d980>] (do_exit+0x0/0x8c8)
r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000
root@dimitar:~$ ttyS1: 1 input overrun(s)
Apr 14, 2009 10:02:56 AM, sandeen@xxxxxxxxxx wrote:
dkg_004@xxxxxxxxxxx wrote:
> Ted,
>
> There are not OOPS messages.
> The kernel is provided by the CPU vendor. From what I know - the Ext3
> code has not been modified.
> At the moment I do not have list of modifications the vendor made, and
> not sure I will be able to get such list. I have the source code so
> probably I can compare with the stock kernel and see what has been changed.
>
> Upgrading the kernel to 2.6.29 will be difficult. Will it be possible to
> upgrade / patch the Ext3 code only? Will that work?
It'd be tough. I've been playing with arm vendor kernels lately
(probably the same codebase) and doing some filesystem backporting...
it's possible but not for the faint-hearted.
You did sysrq-t; if sysrq-w is supported in the kernel it will give you
only the tasks in blocked state, which may show a deadlock more clearly?
-Eric
> I will try with LOCKDEP and see what happens.
>
> Thanks a lot.
>
> Dimitar
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