What's the purpose of this stack dump, and how can it be prevented in this NORMAL situation?? The command was "hdparm --security-erase NULL /dev/sdb", which takes about 66 minutes to complete on this particular drive. I don't see any obvious way for the task to mark itself as needing longer than 120 secs to complete the operation. Thanks. [ 1800.373281] INFO: task hdparm:1979 blocked for more than 120 seconds. [ 1800.373288] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1800.373294] hdparm D f64a4c00 0 1979 1718 0x00000000 [ 1800.373303] f3065c38 00200086 c11be0e3 f64a4c00 c1439ac0 c1439ac0 c1439ac0 c1439ac0 [ 1800.373317] f571bdb8 c1439ac0 c1439ac0 dbdc5ec7 00000163 dbdb0cfb 00000163 f571bb60 [ 1800.373329] 00000001 f3065d18 7fffffff f571bb60 f3065c64 c1270527 f684ca50 f684ca50 [ 1800.373341] Call Trace: [ 1800.373355] [<c11be0e3>] ? ata_scsi_queuecmd+0x6a/0x73 [ 1800.373366] [<c1270527>] schedule_timeout+0x16/0xa5 [ 1800.373376] [<c111a4a2>] ? __blk_run_queue+0x3d/0x5e [ 1800.373383] [<c1118626>] ? elv_insert+0x67/0x18f [ 1800.373389] [<c126fd6a>] wait_for_common+0x8a/0xd9 [ 1800.373399] [<c1028b75>] ? default_wake_function+0x0/0xd [ 1800.373406] [<c126fe3a>] wait_for_completion+0x12/0x14 [ 1800.373413] [<c111d02f>] blk_execute_rq+0x76/0x8f [ 1800.373420] [<c111cf1c>] ? blk_end_sync_rq+0x0/0x28 [ 1800.373428] [<c111cc3f>] ? blk_rq_append_bio+0x14/0x3b [ 1800.373434] [<c111ce95>] ? blk_rq_map_user+0x12e/0x1b5 [ 1800.373442] [<c11201f8>] sg_io+0x269/0x343 [ 1800.373450] [<c11204be>] scsi_cmd_ioctl+0x1ec/0x396 [ 1800.373457] [<c11993cf>] ? get_device+0x13/0x18 [ 1800.373464] [<c11aeabd>] ? sd_open+0x45/0x104 [ 1800.373472] [<c11aea0e>] sd_ioctl+0x6b/0x8c [ 1800.373479] [<c111e2fe>] __blkdev_driver_ioctl+0x66/0x87 [ 1800.373486] [<c111ebb2>] blkdev_ioctl+0x5fe/0x62c [ 1800.373495] [<c1061e3f>] ? filemap_fault+0xb5/0x2fc [ 1800.373503] [<c10a7bde>] block_ioctl+0x2a/0x32 [ 1800.373509] [<c10a7bde>] ? block_ioctl+0x2a/0x32 [ 1800.373518] [<c109345a>] vfs_ioctl+0x27/0x91 [ 1800.373524] [<c10a7bb4>] ? block_ioctl+0x0/0x32 [ 1800.373531] [<c109398d>] do_vfs_ioctl+0x42a/0x45b [ 1800.373538] [<c10727b7>] ? handle_mm_fault+0x3d8/0x7c2 [ 1800.373547] [<c1088e98>] ? fsnotify_modify+0x4f/0x5a [ 1800.373555] [<c101b8f9>] ? do_page_fault+0x1e4/0x243 [ 1800.373562] [<c10939ec>] sys_ioctl+0x2e/0x48 [ 1800.373570] [<c1002750>] sysenter_do_call+0x12/0x26 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
