On Sat, 11 Aug 2007 02:34:34 +0000 (UTC) Russ Dill <[email protected]> wrote:
> On 2.6.22 from debian (stock), I have a process (dpkg) stuck with the following
> calltrace:
>
> SysRq : Show Blocked State
>
> free sibling
> task PC stack pid father child younger older
> dpkg D 00000003 0 26040 20765 (NOTLB)
> e57d5e30 00200082 00000000 00000003 dfc48ba8 00000000 dfc48ba8 00000000
> 00000007 e0af45c0 e8ce17aa 0002827f 00051ec2 e0af46cc c1809980 00000000
> e8ce1324 0002827f 00200082 f881cd4c 00200286 f8ba2c85 c1809980 e57d5e60
> Call Trace:
> [<f881cd4c>] md_wakeup_thread+0x26/0x28 [md_mod]
> [<f8ba2c85>] raid5_unplug_device+0x4e/0x5a [raid456]
The above is stack gunk.
> [<c02a786e>] io_schedule+0x1d/0x27
> [<c014f3c5>] sync_page+0x0/0x3b
> [<c014f3fd>] sync_page+0x38/0x3b
> [<c02a7a6f>] __wait_on_bit_lock+0x2a/0x52
> [<c014f3b7>] __lock_page+0x58/0x5e
> [<c01333aa>] wake_bit_function+0x0/0x3c
> [<c0155daa>] truncate_inode_pages_range+0x201/0x256
> [<c0155e16>] truncate_inode_pages+0x17/0x1a
> [<f8c867eb>] reiserfs_delete_inode+0x36/0xdd [reiserfs]
> [<f8c867b5>] reiserfs_delete_inode+0x0/0xdd [reiserfs]
> [<c017acc5>] generic_delete_inode+0xa0/0x105
> [<c017a4ad>] iput+0x60/0x62
> [<c0172f41>] do_unlinkat+0xb6/0x126
> [<c0103d7e>] syscall_call+0x7/0xb
> =======================
>
> My system is still up and running.
>
It's stuck waiting for a page to come unlocked. The most likely
explanation is that an IO got lost.
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