Timeout message on optical media

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Hi.

I'm getting these when I dd zeros across my DVD-RAM.
Linux 2.6.32  -x64
udev-146-r1

Perhaps we can  do this better?

--John

INFO: task scsi_id:5533 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
scsi_id       D 0000000000000000     0  5533   5532 0x00000000
 ffff8801078abc38 0000000000000086 0000000000000000 ffff8801078abd58
 000000000000c928 ffff8801078abfd8 ffff88022d81f350 ffff88022f88e650
 ffff88022d81f5c8 0000000181194008 000000010002a572 ffff88002828c928
Call Trace:
 [<ffffffff813e93c2>] __mutex_lock_slowpath+0xf2/0x180
 [<ffffffff81213250>] ? exact_match+0x0/0x10
 [<ffffffff813e91fe>] mutex_lock+0x1e/0x40
 [<ffffffff81104678>] __blkdev_get+0x38/0x390
 [<ffffffff811049db>] blkdev_get+0xb/0x10
 [<ffffffff81104a4c>] blkdev_open+0x6c/0xc0
 [<ffffffff810d5a09>] __dentry_open+0x139/0x320
 [<ffffffff811049e0>] ? blkdev_open+0x0/0xc0
 [<ffffffff810d5cf7>] nameidata_to_filp+0x57/0x70
 [<ffffffff810e505a>] do_filp_open+0x72a/0xb00
 [<ffffffff810ef16a>] ? alloc_fd+0x4a/0x140
 [<ffffffff810d57bf>] do_sys_open+0x7f/0x140
 [<ffffffff810d58ab>] sys_open+0x1b/0x20
 [<ffffffff8100b36b>] system_call_fastpath+0x16/0x1b
--
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