Hi,

I got this oops while running open-iscsi on a CentOS 5.3 machine
(don't know how to recreate it). it crashes while trying to wake up
the work queue after queuecommand was called. Has anyone seen
something similar?

Jan  2 22:24:27 172.16.9.55 RIP: 0010:[<ffffffff8008cccf>]
Jan  2 22:24:27 172.16.9.55  [<ffffffff8008cccf>] resched_task+0x12/0x65
Jan  2 22:24:27 172.16.9.55 RSP: 0018:ffff81033f4e3948  EFLAGS: 00010097
Jan  2 22:24:27 172.16.9.55 RAX: ffffffff80420400 RBX: 0000a7784ff72815 RCX:
ffff81033f4e2000
Jan  2 22:24:27 172.16.9.55 RDX: 000000003f4e2048 RSI: ffff810302f0d0f8 RDI:
ffff8103307e47a0
Jan  2 22:24:27 172.16.9.55 RBP: ffff81033f4e3948 R08: ffff810653e3fea0 R09:
0000000000000020
Jan  2 22:24:27 172.16.9.55 R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000007
Jan  2 22:24:27 172.16.9.55 R13: ffff81065d7990c0 R14: 0000000000000007 R15:
ffff81000901c480
Jan  2 22:24:27 172.16.9.55 FS:  00002aac40713940(0000)
GS:ffff81010dae53c0(0000) knlGS:0000000000000000
Jan  2 22:24:27 172.16.9.55 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan  2 22:24:27 172.16.9.55 CR2: 000000017aae7c80 CR3: 00000005ea57f000 CR4:
00000000000006e0
Jan  2 22:24:27 172.16.9.55 Process kal (pid: 15472, threadinfo
ffff81033f4e2000, task ffff8103307e47a0)
Jan  2 22:24:27 172.16.9.55 Stack:
Jan  2 22:24:27 172.16.9.55  ffff81033f4e39e8
Jan  2 22:24:27 172.16.9.55  ffffffff8004676f
Jan  2 22:24:27 172.16.9.55  00000000307e47a0
Jan  2 22:24:27 172.16.9.55  0000000000000001
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55  0000000700115288
Jan  2 22:24:27 172.16.9.55  0000000000000001
Jan  2 22:24:27 172.16.9.55  0000000700000000
Jan  2 22:24:27 172.16.9.55  0000000000000000
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55  6666663135343732
Jan  2 22:24:27 172.16.9.55  ffffffff80012e80
Jan  2 22:24:27 172.16.9.55  0000001000000000
Jan  2 22:24:27 172.16.9.55  0000000000000000
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55 Call Trace:
Jan  2 22:24:27 172.16.9.55  [<ffffffff8004676f>] try_to_wake_up+0x422/0x481
Jan  2 22:24:27 172.16.9.55  [<ffffffff80012e80>] get_request+0x1a6/0x36d
Jan  2 22:24:27 172.16.9.55  [<ffffffff800a097d>]
autoremove_wake_function+0x9/0x2e
Jan  2 22:24:27 172.16.9.55  [<ffffffff8008b6d6>]
__wake_up_common+0x3e/0x68
Jan  2 22:24:27 172.16.9.55  [<ffffffff8002dd0a>] __wake_up+0x38/0x4f
Jan  2 22:24:27 172.16.9.55  [<ffffffff8009263f>] vprintk+0x2b2/0x317
Jan  2 22:24:27 172.16.9.55  [<ffffffff8001bbb8>]
generic_make_request+0x1d2/0x1e9
Jan  2 22:24:27 172.16.9.55  [<ffffffff800926f6>] printk+0x52/0xbd
Jan  2 22:24:27 172.16.9.55  [<ffffffff8009d8b7>]
__queue_work+0x43/0x53
Jan  2 22:24:27 172.16.9.55  [<ffffffff8009d945>] queue_work+0x4e/0x57
Jan  2 22:24:27 172.16.9.55  [<ffffffff8009d945>] queue_work+0x4e/0x57
Jan  2 22:24:27 172.16.9.55  [<ffffffff882033fe>]
:libiscsi:iscsi_queuecommand+0x40e/0x434
Jan  2 22:24:27 172.16.9.55  [<ffffffff880755a6>]
:scsi_mod:scsi_done+0x0/0x18
Jan  2 22:24:27 172.16.9.55  [<ffffffff800624d8>]
__sched_text_start+0x78/0xbd5
Jan  2 22:24:27 172.16.9.55  [<ffffffff8013f3df>]
elv_next_request+0x196/0x1a6
Jan  2 22:24:27 172.16.9.55  [<ffffffff8006dd2b>]
do_gettimeofday+0x40/0x8f
Jan  2 22:24:27 172.16.9.55  [<ffffffff8005a05d>]
getnstimeofday+0x10/0x28
Jan  2 22:24:27 172.16.9.55  [<ffffffff8006389b>]
io_schedule+0x3f/0x67
Jan  2 22:24:27 172.16.9.55  [<ffffffff800f170f>]
__blockdev_direct_IO+0x8b0/0xa19
Jan  2 22:24:27 172.16.9.55  [<ffffffff800e3265>]
blkdev_direct_IO+0x32/0x37
Jan  2 22:24:27 172.16.9.55  [<ffffffff800e319d>]
blkdev_get_blocks+0x0/0x96
Jan  2 22:24:27 172.16.9.55  [<ffffffff8000c1f1>]
__generic_file_aio_read+0xb8/0x190
Jan  2 22:24:27 172.16.9.55  [<ffffffff800c5d80>]
generic_file_read+0xac/0xc5
Jan  2 22:24:27 172.16.9.55  [<ffffffff800a0974>]
autoremove_wake_function+0x0/0x2e
Jan  2 22:24:27 172.16.9.55  [<ffffffff80063097>]
thread_return+0x62/0xfe
Jan  2 22:24:27 172.16.9.55  [<ffffffff800b73c3>]
audit_syscall_entry+0x16e/0x1a1
Jan  2 22:24:27 172.16.9.55  [<ffffffff8000b379>] vfs_read+0xcb/0x171
Jan  2 22:24:27 172.16.9.55  [<ffffffff80013097>]
sys_pread64+0x50/0x70
Jan  2 22:24:27 172.16.9.55  [<ffffffff8005d229>] tracesys+0x71/0xe0
Jan  2 22:24:27 172.16.9.55  [<ffffffff8005d28d>] tracesys+0xd5/0xe0
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55 Code:
Jan  2 22:24:27 172.16.9.55 48
Jan  2 22:24:27 172.16.9.55 8b
Jan  2 22:24:27 172.16.9.55 14
Jan  2 22:24:27 172.16.9.55 d5
Jan  2 22:24:27 172.16.9.55 40
Jan  2 22:24:27 172.16.9.55 7a
Jan  2 22:24:27 172.16.9.55 3d
Jan  2 22:24:27 172.16.9.55 80
Jan  2 22:24:27 172.16.9.55 48
Jan  2 22:24:27 172.16.9.55 03
Jan  2 22:24:27 172.16.9.55 42
Jan  2 22:24:27 172.16.9.55 08
Jan  2 22:24:27 172.16.9.55 8b
Jan  2 22:24:27 172.16.9.55 00
Jan  2 22:24:27 172.16.9.55 85
Jan  2 22:24:27 172.16.9.55 c0
Jan  2 22:24:27 172.16.9.55 7e
Jan  2 22:24:27 172.16.9.55 0a
Jan  2 22:24:27 172.16.9.55 0f
Jan  2 22:24:27 172.16.9.55 0b
Jan  2 22:24:27 172.16.9.55
Jan  2 22:24:27 172.16.9.55 RIP
Jan  2 22:24:27 172.16.9.55  [<ffffffff8008cccf>] resched_task+0x12/0x65
Jan  2 22:24:27 172.16.9.55  RSP <ffff81033f4e3948>
Jan  2 22:24:28 172.16.9.55 BUG: warning at
arch/x86_64/kernel/crash.c:148/nmi_shootdown_cpus() (Tainted: GF    )
Jan  2 22:24:28 172.16.9.55
Jan  2 22:24:28 172.16.9.55 Call Trace:
Jan  2 22:24:28 172.16.9.55  [<ffffffff80079d49>]
machine_crash_shutdown+0xaa/0xf3
Jan  2 22:24:28 172.16.9.55  [<ffffffff800ad79b>] crash_kexec+0xcc/0xe8
Jan  2 22:24:28 172.16.9.55  [<ffffffff8008cccf>] resched_task+0x12/0x65
Jan  2 22:24:28 172.16.9.55  [<ffffffff8006520f>] __die+0xf6/0xff
Jan  2 22:24:28 172.16.9.55  [<ffffffff80066e1b>] do_page_fault+0x74c/0x82f
Jan  2 22:24:28 172.16.9.55  [<ffffffff800a291f>] ktime_get_ts+0x1a/0x4e
Jan  2 22:24:28 172.16.9.55  [<ffffffff8005dde9>] error_exit+0x0/0x84
Jan  2 22:24:28 172.16.9.55  [<ffffffff8008cccf>] resched_task+0x12/0x65
Jan  2 22:24:28 172.16.9.55  [<ffffffff8004676f>] try_to_wake_up+0x422/0x481
Jan  2 22:24:28 172.16.9.55  [<ffffffff80012e80>] get_request+0x1a6/0x36d
Jan  2 22:24:28 172.16.9.55  [<ffffffff800a097d>]
autoremove_wake_function+0x9/0x2e
Jan  2 22:24:28 172.16.9.55  [<ffffffff8008b6d6>] __wake_up_common+0x3e/0x68
Jan  2 22:24:28 172.16.9.55  [<ffffffff8002dd0a>] __wake_up+0x38/0x4f
Jan  2 22:24:28 172.16.9.55  [<ffffffff8009263f>] vprintk+0x2b2/0x317
Jan  2 22:24:28 172.16.9.55  [<ffffffff8001bbb8>]
generic_make_request+0x1d2/0x1e9
Jan  2 22:24:28 172.16.9.55  [<ffffffff800926f6>] printk+0x52/0xbd
Jan  2 22:24:28 172.16.9.55  [<ffffffff8009d8b7>] __queue_work+0x43/0x53
Jan  2 22:24:28 172.16.9.55  [<ffffffff8009d945>] queue_work+0x4e/0x57
Jan  2 22:24:28 172.16.9.55  [<ffffffff882033fe>]
:libiscsi:iscsi_queuecommand+0x40e/0x434
Jan  2 22:24:28 172.16.9.55  [<ffffffff880755a6>] :scsi_mod:scsi_done+0x0/0x18
Jan  2 22:24:28 172.16.9.55  [<ffffffff800624d8>] __sched_text_start+0x78/0xbd5
Jan  2 22:24:28 172.16.9.55  [<ffffffff8013f3df>] elv_next_request+0x196/0x1a6
Jan  2 22:24:28 172.16.9.55  [<ffffffff8006dd2b>] do_gettimeofday+0x40/0x8f
Jan  2 22:24:28 172.16.9.55  [<ffffffff8005a05d>] getnstimeofday+0x10/0x28
Jan  2 22:24:28 172.16.9.55  [<ffffffff8006389b>] io_schedule+0x3f/0x67
Jan  2 22:24:28 172.16.9.55  [<ffffffff800f170f>]
__blockdev_direct_IO+0x8b0/0xa19
Jan  2 22:24:28 172.16.9.55  [<ffffffff800e3265>] blkdev_direct_IO+0x32/0x37
Jan  2 22:24:28 172.16.9.55  [<ffffffff800e319d>] blkdev_get_blocks+0x0/0x96
Jan  2 22:24:28 172.16.9.55  [<ffffffff8000c1f1>]
__generic_file_aio_read+0xb8/0x190
Jan  2 22:24:28 172.16.9.55  [<ffffffff800c5d80>] generic_file_read+0xac/0xc5
Jan  2 22:24:28 172.16.9.55  [<ffffffff800a0974>]
autoremove_wake_function+0x0/0x2e
Jan  2 22:24:28 172.16.9.55  [<ffffffff80063097>] thread_return+0x62/0xfe
Jan  2 22:24:28 172.16.9.55  [<ffffffff800b73c3>]
audit_syscall_entry+0x16e/0x1a1
Jan  2 22:24:28 172.16.9.55  [<ffffffff8000b379>] vfs_read+0xcb/0x171
Jan  2 22:24:28 172.16.9.55  [<ffffffff80013097>] sys_pread64+0x50/0x70
Jan  2 22:24:28 172.16.9.55  [<ffffffff8005d229>] tracesys+0x71/0xe0
Jan  2 22:24:28 172.16.9.55  [<ffffffff8005d28d>] tracesys+0xd5/0xe0
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