使っているカーネルはこんなバージョン。
[masami@moon:~]% uname -a
Linux moon 2.6.30-rc5-x86tip-tip #1 SMP Sat May 9 22:38:05 JST 2009 x86_64 GNU/Linux
やっていることは何の変哲もないddコマンドなんだけど、killコマンドすら受け付けん。。
[masami@moon:~/build/tinycore]% sudo dd if=./hda.img of=/dev/sdf bs=1M
psコマンドでプロセスの状態を見ると、ステータスがDなのでこんな状態。
D 割り込み不可能なスリープ状態 (通常 IO 中)
デッドロックか？と思ってAlt+SysRq+dで確認。
[51339.950125] SysRq : Show Locks Held
[51339.950133]
[51339.950134] Showing all locks held in the system:
[51339.950161] 1 lock held by getty/3706:
[51339.950164] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950177] 1 lock held by getty/3707:
[51339.950180] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950188] 1 lock held by getty/3708:
[51339.950190] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950199] 1 lock held by getty/3709:
[51339.950201] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950209] 1 lock held by getty/3710:
[51339.950211] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950219] 1 lock held by getty/3711:
[51339.950221] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950236] 1 lock held by usb-storage/8435:
[51339.950238] #0: (&(us->dev_mutex)){+.+...}, at: [<ffffffffa01047ce>] usb_stor_control_thread+0x4a/0x1f9 [usb_storage]
[51339.950272] 1 lock held by hald-addon-stor/8476:
[51339.950274] #0: (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8030538b>] __blkdev_get+0x78/0x356
[51339.950285] 1 lock held by dd/8558:
[51339.950287] #0: (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff80305183>] __blkdev_put+0x2b/0x15b
[51339.950295] 1 lock held by zsh/8559:
[51339.950297] #0: (&tty->atomic_read_lock){+.+.+.}, at: [<ffffffff803d66b2>] n_tty_read+0x259/0x714
[51339.950305]
[51339.950307] =============================================
[51339.950308] その後のdmesgで何かメッセージが出てないか確認するとこんなメッセージが出てきていた。
[51361.424105] INFO: task hald-addon-stor:8476 blocked for more than 120 seconds.
[51361.424111] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[51361.424115] hald-addon-st D ffff880086ce9900 0 8476 3530 0x00000000
[51361.424122] ffff8800aa5f8000 0000000000000046 ffff8800544a86d8 0000000100000246
[51361.424128] ffff8800544a8000 00000000001d6080 000000000000f6d0 ffff8800544a8000
[51361.424135] ffff8800544a82f8 0000000000000246 0000000000000000 ffff8800544a8000
[51361.424142] Call Trace:
[51361.424152] [<ffffffff8026e1a4>] ? mark_held_locks+0x4b/0x67
[51361.424158] [<ffffffff804afdae>] ? __mutex_lock_common+0x1f7/0x38c
[51361.424165] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51361.424169] [<ffffffff804afdbd>] ? __mutex_lock_common+0x206/0x38c
[51361.424174] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51361.424180] [<ffffffff803f6eab>] ? kobj_lookup+0x120/0x157
[51361.424185] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51361.424190] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51361.424195] [<ffffffff8037cd95>] ? _raw_spin_unlock+0x8b/0x92
[51361.424200] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51361.424204] [<ffffffff803056d7>] ? blkdev_open+0x67/0x96
[51361.424209] [<ffffffff802e0ade>] ? __dentry_open+0x148/0x265
[51361.424214] [<ffffffff802ec08f>] ? do_filp_open+0x3ea/0x7d6
[51361.424220] [<ffffffff8021716e>] ? native_sched_clock+0x2e/0x5b
[51361.424224] [<ffffffff802171a0>] ? sched_clock+0x5/0x8
[51361.424229] [<ffffffff8026cdbf>] ? lock_release_holdtime+0x2a/0x11e
[51361.424233] [<ffffffff804b0dd8>] ? _spin_unlock+0x17/0x20
[51361.424238] [<ffffffff802f5391>] ? alloc_fd+0x112/0x123
[51361.424243] [<ffffffff802e08ee>] ? do_sys_open+0x48/0xc5
[51361.424248] [<ffffffff80210ac2>] ? system_call_fastpath+0x16/0x1b
[51361.424252] 1 lock held by hald-addon-stor/8476:
[51361.424255] #0: (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8030538b>] __blkdev_get+0x78/0x356
[51481.428077] INFO: task hald-addon-stor:8476 blocked for more than 120 seconds.
[51481.428082] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[51481.428086] hald-addon-st D ffff880086ce9900 0 8476 3530 0x00000000
[51481.428093] ffff8800aa5f8000 0000000000000046 ffff8800544a86d8 0000000100000246
[51481.428100] ffff8800544a8000 00000000001d6080 000000000000f6d0 ffff8800544a8000
[51481.428106] ffff8800544a82f8 0000000000000246 0000000000000000 ffff8800544a8000
[51481.428113] Call Trace:
[51481.428122] [<ffffffff8026e1a4>] ? mark_held_locks+0x4b/0x67
[51481.428129] [<ffffffff804afdae>] ? __mutex_lock_common+0x1f7/0x38c
[51481.428136] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51481.428140] [<ffffffff804afdbd>] ? __mutex_lock_common+0x206/0x38c
[51481.428144] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51481.428151] [<ffffffff803f6eab>] ? kobj_lookup+0x120/0x157
[51481.428155] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51481.428160] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51481.428166] [<ffffffff8037cd95>] ? _raw_spin_unlock+0x8b/0x92
[51481.428170] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51481.428175] [<ffffffff803056d7>] ? blkdev_open+0x67/0x96
[51481.428180] [<ffffffff802e0ade>] ? __dentry_open+0x148/0x265
[51481.428185] [<ffffffff802ec08f>] ? do_filp_open+0x3ea/0x7d6
[51481.428190] [<ffffffff8021716e>] ? native_sched_clock+0x2e/0x5b
[51481.428195] [<ffffffff802171a0>] ? sched_clock+0x5/0x8
[51481.428199] [<ffffffff8026cdbf>] ? lock_release_holdtime+0x2a/0x11e
[51481.428203] [<ffffffff804b0dd8>] ? _spin_unlock+0x17/0x20
[51481.428208] [<ffffffff802f5391>] ? alloc_fd+0x112/0x123
[51481.428212] [<ffffffff802e08ee>] ? do_sys_open+0x48/0xc5
[51481.428218] [<ffffffff80210ac2>] ? system_call_fastpath+0x16/0x1b
[51481.428222] 1 lock held by hald-addon-stor/8476:
[51481.428224] #0: (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8030538b>] __blkdev_get+0x78/0x356
[51601.424288] INFO: task hald-addon-stor:8476 blocked for more than 120 seconds.
[51601.424293] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[51601.424297] hald-addon-st D ffff880086ce9900 0 8476 3530 0x00000000
[51601.424304] ffff8800aa5f8000 0000000000000046 ffff8800544a86d8 0000000100000246
[51601.424311] ffff8800544a8000 00000000001d6080 000000000000f6d0 ffff8800544a8000
[51601.424318] ffff8800544a82f8 0000000000000246 0000000000000000 ffff8800544a8000
[51601.424324] Call Trace:
[51601.424334] [<ffffffff8026e1a4>] ? mark_held_locks+0x4b/0x67
[51601.424340] [<ffffffff804afdae>] ? __mutex_lock_common+0x1f7/0x38c
[51601.424347] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51601.424352] [<ffffffff804afdbd>] ? __mutex_lock_common+0x206/0x38c
[51601.424356] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51601.424363] [<ffffffff803f6eab>] ? kobj_lookup+0x120/0x157
[51601.424368] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51601.424372] [<ffffffff8030538b>] ? __blkdev_get+0x78/0x356
[51601.424378] [<ffffffff8037cd95>] ? _raw_spin_unlock+0x8b/0x92
[51601.424383] [<ffffffff80305670>] ? blkdev_open+0x0/0x96
[51601.424388] [<ffffffff803056d7>] ? blkdev_open+0x67/0x96
[51601.424393] [<ffffffff802e0ade>] ? __dentry_open+0x148/0x265
[51601.424398] [<ffffffff802ec08f>] ? do_filp_open+0x3ea/0x7d6
[51601.424404] [<ffffffff8021716e>] ? native_sched_clock+0x2e/0x5b
[51601.424408] [<ffffffff802171a0>] ? sched_clock+0x5/0x8
[51601.424413] [<ffffffff8026cdbf>] ? lock_release_holdtime+0x2a/0x11e
[51601.424418] [<ffffffff804b0dd8>] ? _spin_unlock+0x17/0x20
[51601.424423] [<ffffffff802f5391>] ? alloc_fd+0x112/0x123
[51601.424427] [<ffffffff802e08ee>] ? do_sys_open+0x48/0xc5
[51601.424433] [<ffffffff80210ac2>] ? system_call_fastpath+0x16/0x1b
[51601.424437] 1 lock held by hald-addon-stor/8476:
[51601.424440] #0: (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8030538b>] __blkdev_get+0x78/0x356
[masami@moon:~]% 何分か待っていたらプロセスは終了したので良いけど、何かがどこかでおかしいのはまちがいなさそう／(^o^)＼
