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Date
SubjectRe: [BUG] D state process after unplug and umount usb disk
From
On Sat, Sep 3, 2011 at 6:31 PM, Dave Young <hidave.darkstar@gmail.com> wrote:
> Hi,
>
> Known issue?
>
> Reproduce by:
> mount /dev/sdb2 /mnt/sdb2 -t ext3
> cat /mnt/sdb2/* >/dev/null
> unplug usb disk
> umount -f /mnt/sdb2
>
> dmesg as below:
>
> [ 1440.567271] SysRq : Show Blocked State
> [ 1440.567278]   task                        PC stack   pid father
> [ 1440.567312] cat             D ffff880037a1e378  4296  2381   2310 0x00000004
> [ 1440.567320]  ffff88003cca5838 0000000000000046 ffff88003cca57e8
> ffffffff00000000
> [ 1440.567332]  00000000000134c0 00000000000134c0 00000000000134c0
> ffff880037a1e000
> [ 1440.567339]  00000000000134c0 ffff88003cca5fd8 00000000000134c0
> 00000000000134c0
> [ 1440.567347] Call Trace:
> [ 1440.567357]  [<ffffffff810c0468>] ? lock_page+0x2a/0x2a
> [ 1440.567363]  [<ffffffff815e452d>] io_schedule+0x5e/0x79
> [ 1440.567368]  [<ffffffff810c0471>] sleep_on_page+0x9/0xd
> [ 1440.567373]  [<ffffffff815e4adf>] __wait_on_bit_lock+0x41/0x8a
> [ 1440.567378]  [<ffffffff810c0437>] __lock_page+0x61/0x68
> [ 1440.567384]  [<ffffffff81058739>] ? autoremove_wake_function+0x34/0x34
> [ 1440.567390]  [<ffffffff8102f704>] ? should_resched+0x9/0x29
> [ 1440.567395]  [<ffffffff810c9b0b>] lock_page+0x25/0x29
> [ 1440.567400]  [<ffffffff810ca1ac>] truncate_inode_pages_range+0x2a6/0x32d
> [ 1440.567406]  [<ffffffff810ca240>] truncate_inode_pages+0xd/0xf
> [ 1440.567411]  [<ffffffff811642cf>] ext3_evict_inode+0xc9/0x1d7
> [ 1440.567417]  [<ffffffff8111288e>] evict+0xa3/0x15e
> [ 1440.567422]  [<ffffffff81112b34>] dispose_list+0x3d/0x49
> [ 1440.567426]  [<ffffffff81113475>] evict_inodes+0xf1/0x100
> [ 1440.567431]  [<ffffffff810ffd21>] generic_shutdown_super+0x47/0xc7
> [ 1440.567436]  [<ffffffff810ffdc3>] kill_block_super+0x22/0x65
> [ 1440.567441]  [<ffffffff811000da>] deactivate_locked_super+0x21/0x52
> [ 1440.567445]  [<ffffffff811009ab>] deactivate_super+0x35/0x39
> [ 1440.567452]  [<ffffffff81116395>] mntput_no_expire+0xcb/0xd0
> [ 1440.567457]  [<ffffffff811163bb>] mntput+0x21/0x23
> [ 1440.567461]  [<ffffffff810ff8e7>] fput+0x196/0x1a5
> [ 1440.567467]  [<ffffffff810fc7a1>] filp_close+0x6b/0x76
> [ 1440.567472]  [<ffffffff8103fa8a>] put_files_struct+0x73/0xd1
> [ 1440.567477]  [<ffffffff8103fb7b>] exit_files+0x46/0x4f
> [ 1440.567481]  [<ffffffff8103fe01>] do_exit+0x27d/0x7b3
> [ 1440.567487]  [<ffffffff8104d97f>] ? get_signal_to_deliver+0x81/0x4ac
> [ 1440.567493]  [<ffffffff812e5e27>] ? do_raw_spin_lock+0x6b/0x122
> [ 1440.567497]  [<ffffffff810405c5>] do_group_exit+0x7d/0xa8
> [ 1440.567502]  [<ffffffff8104dd8b>] get_signal_to_deliver+0x48d/0x4ac
> [ 1440.567509]  [<ffffffff81001ea2>] do_signal+0x39/0x600
> [ 1440.567514]  [<ffffffff810fdb37>] ? fsnotify_access+0x5d/0x65
> [ 1440.567519]  [<ffffffff810024a4>] do_notify_resume+0x27/0x69
> [ 1440.567524]  [<ffffffff812e158e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> [ 1440.567529]  [<ffffffff815ecd63>] int_signal+0x12/0x17
> [ 1440.710163] INFO: task cat:2381 blocked for more than 120 seconds.
> [ 1440.710170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> disables this message.
> [ 1440.710175] cat             D ffff880037a1e378  4296  2381   2310 0x00000004
> [ 1440.710188]  ffff88003cca5838 0000000000000046 ffff88003cca57e8
> ffffffff00000000
> [ 1440.710201]  00000000000134c0 00000000000134c0 00000000000134c0
> ffff880037a1e000
> [ 1440.710218]  00000000000134c0 ffff88003cca5fd8 00000000000134c0
> 00000000000134c0
> [ 1440.710225] Call Trace:
> [ 1440.710233]  [<ffffffff810c0468>] ? lock_page+0x2a/0x2a
> [ 1440.710239]  [<ffffffff815e452d>] io_schedule+0x5e/0x79
> [ 1440.710244]  [<ffffffff810c0471>] sleep_on_page+0x9/0xd
> [ 1440.710249]  [<ffffffff815e4adf>] __wait_on_bit_lock+0x41/0x8a
> [ 1440.710253]  [<ffffffff810c0437>] __lock_page+0x61/0x68
> [ 1440.710259]  [<ffffffff81058739>] ? autoremove_wake_function+0x34/0x34
> [ 1440.710264]  [<ffffffff8102f704>] ? should_resched+0x9/0x29
> [ 1440.710269]  [<ffffffff810c9b0b>] lock_page+0x25/0x29
> [ 1440.710274]  [<ffffffff810ca1ac>] truncate_inode_pages_range+0x2a6/0x32d
> [ 1440.710279]  [<ffffffff810ca240>] truncate_inode_pages+0xd/0xf
> [ 1440.710284]  [<ffffffff811642cf>] ext3_evict_inode+0xc9/0x1d7
> [ 1440.710289]  [<ffffffff8111288e>] evict+0xa3/0x15e
> [ 1440.710294]  [<ffffffff81112b34>] dispose_list+0x3d/0x49
> [ 1440.710299]  [<ffffffff81113475>] evict_inodes+0xf1/0x100
> [ 1440.710303]  [<ffffffff810ffd21>] generic_shutdown_super+0x47/0xc7
> [ 1440.710308]  [<ffffffff810ffdc3>] kill_block_super+0x22/0x65
> [ 1440.710312]  [<ffffffff811000da>] deactivate_locked_super+0x21/0x52
> [ 1440.710316]  [<ffffffff811009ab>] deactivate_super+0x35/0x39
> [ 1440.710322]  [<ffffffff81116395>] mntput_no_expire+0xcb/0xd0
> [ 1440.710326]  [<ffffffff811163bb>] mntput+0x21/0x23
> [ 1440.710330]  [<ffffffff810ff8e7>] fput+0x196/0x1a5
> [ 1440.710335]  [<ffffffff810fc7a1>] filp_close+0x6b/0x76
> [ 1440.710342]  [<ffffffff8103fa8a>] put_files_struct+0x73/0xd1
> [ 1440.710346]  [<ffffffff8103fb7b>] exit_files+0x46/0x4f
> [ 1440.710350]  [<ffffffff8103fe01>] do_exit+0x27d/0x7b3
> [ 1440.710356]  [<ffffffff8104d97f>] ? get_signal_to_deliver+0x81/0x4ac
> [ 1440.710361]  [<ffffffff812e5e27>] ? do_raw_spin_lock+0x6b/0x122
> [ 1440.710366]  [<ffffffff810405c5>] do_group_exit+0x7d/0xa8
> [ 1440.710371]  [<ffffffff8104dd8b>] get_signal_to_deliver+0x48d/0x4ac
> [ 1440.710376]  [<ffffffff81001ea2>] do_signal+0x39/0x600
> [ 1440.710381]  [<ffffffff810fdb37>] ? fsnotify_access+0x5d/0x65
> [ 1440.710386]  [<ffffffff810024a4>] do_notify_resume+0x27/0x69
> [ 1440.710391]  [<ffffffff812e158e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> [ 1440.710396]  [<ffffffff815ecd63>] int_signal+0x12/0x17

(correct Fengguang's email, he uses Intel's email)

Where does this exit signal come from?
Does USB interrupt handler will send kill signal to all processes
accessing it when it's unplugged(by hand)?

Lin Ming
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