There seems to be some problems with the latest linux-2.6.git tree
where running some basic I/O with DT against some FC storage, yields
numerous badness warnings, null pointer dereferencing and subsequent
hangs.
I'm trying to track it down now, but it seems to be related to the
recent merge:
Merge branch 'generic-dispatch' of git://brick.kernel.dk/data/git/linux-2.6-block
28d721e24c88496ff8e9c4a0959bdc1415c0658e
Here's the log captured via serial
------------------------- 8< ----------------------------
Badness in as_del_arq_rb at drivers/block/as-iosched.c:402
Call Trace:<ffffffff802651ac>{as_merged_request+172} <ffffffff8025b226>{elv_merged_request+38}
<ffffffff8025fe14>{__make_request+804} <ffffffff8025e2ce>{generic_make_request+382}
<ffffffff8025e3b8>{submit_bio+216} <ffffffff8018efcb>{dio_bio_submit+107}
<ffffffff8018ff29>{__blockdev_direct_IO+2601} <ffffffff80328979>{_read_unlock_irq+9}
<ffffffff8016f9f5>{blkdev_direct_IO+69} <ffffffff8016f860>{blkdev_get_blocks+0}
<ffffffff80146b7c>{generic_file_direct_IO+188} <ffffffff80148fa4>{__generic_file_aio_read+228}
<ffffffff8014922b>{generic_file_read+187} <ffffffff80328a9e>{_spin_lock_irqsave+14}
<ffffffff80329659>{do_page_fault+1113} <ffffffff8015b115>{vma_link+133}
<ffffffff8013ba70>{autoremove_wake_function+0} <ffffffff80168255>{vfs_read+197}
<ffffffff80168403>{sys_read+83} <ffffffff8010dbfe>{system_call+126}
Badness in as_activate_request at drivers/block/as-iosched.c:1413
Call Trace:<ffffffff80263d01>{as_activate_request+49} <ffffffff8025bac8>{elv_next_request+56}
<ffffffff8029d238>{scsi_request_fn+136} <ffffffff802639c0>{as_work_handler+0}
<ffffffff802639f5>{as_work_handler+53} <ffffffff8013706c>{worker_thread+476}
<ffffffff801209e0>{default_wake_function+0} <ffffffff801209e0>{default_wake_function+0}
<ffffffff8013b7a0>{keventd_create_kthread+0} <ffffffff80136e90>{worker_thread+0}
<ffffffff8013b7a0>{keventd_create_kthread+0} <ffffffff8013b8f9>{kthread+217}
<ffffffff8010eca6>{child_rip+8} <ffffffff8013b7a0>{keventd_create_kthread+0}
<ffffffff8013b820>{kthread+0} <ffffffff8010ec9e>{child_rip+0}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Badness in as_move_to_dispatch at drivers/block/as-iosched.c:1134
Call Trace: <IRQ> <ffffffff80264c2d>{as_move_to_dispatch+349} <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Unable to handle kernel NULL pointer dereference at 0000000000000030 RIP:
<ffffffff80264beb>{as_move_to_dispatch+283}
PGD 37b14067 PUD 37dfb067 PMD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in: qla2xxx scsi_transport_fc
Pid: 10944, comm: dt Not tainted 2.6.14 #13
RIP: 0010:[<ffffffff80264beb>] <ffffffff80264beb>{as_move_to_dispatch+283}
RSP: 0018:ffffffff80453268 EFLAGS: 00010002
RAX: ffff81003684ea90 RBX: 0000000000000000 RCX: ffff81002d45ce60
RDX: ffff81003fe93050 RSI: 0000000000000092 RDI: ffffffff803e8d10
RBP: ffff81002e63e720 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff81002c1f60f0
R13: ffff81003fbfe6c0 R14: 0000000000000001 R15: ffff81002e5e7778
FS: 00002aaaab2890a0(0000) GS:ffffffff8048e800(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000030 CR3: 0000000028470000 CR4: 00000000000006e0
Process dt (pid: 10944, threadinfo ffff810035940000, task ffff810032898ae0)
Stack: ffff81002e63e720 0000000000000001 0000000000000000 ffff81003fbfe6c0
ffff81003dce2638 ffffffff802650d6 0000000000000292 0000000000000000
0000000000000000 ffff81003fe93050
Call Trace: <IRQ> <ffffffff802650d6>{as_dispatch_request+1046}
<ffffffff8025bbc3>{elv_next_request+307} <ffffffff8029d238>{scsi_request_fn+136}
<ffffffff8025f58d>{blk_run_queue+61} <ffffffff8029d60f>{scsi_end_request+207}
<ffffffff8029d899>{scsi_io_completion+617} <ffffffff802b3d71>{sd_rw_intr+737}
<ffffffff80296da6>{scsi_finish_command+198} <ffffffff802977ac>{scsi_softirq+380}
<ffffffff8012b0fb>{__do_softirq+107} <ffffffff8010f137>{call_softirq+31}
<ffffffff801105c1>{do_softirq+49} <ffffffff8010e954>{apic_timer_interrupt+132}
<EOI> <ffffffff803289ce>{_spin_unlock_irq+14} <ffffffff8025fff0>{__make_request+1280}
<ffffffff8025e2ce>{generic_make_request+382} <ffffffff8025e3b8>{submit_bio+216}
<ffffffff8018efcb>{dio_bio_submit+107} <ffffffff8018ff29>{__blockdev_direct_IO+2601}
<ffffffff80328979>{_read_unlock_irq+9} <ffffffff8016f9f5>{blkdev_direct_IO+69}
<ffffffff8016f860>{blkdev_get_blocks+0} <ffffffff80146b7c>{generic_file_direct_IO+188}
<ffffffff80148fa4>{__generic_file_aio_read+228} <ffffffff8014922b>{generic_file_read+187}
<ffffffff80328a9e>{_spin_lock_irqsave+14} <ffffffff80329659>{do_page_fault+1113}
<ffffffff8015b115>{vma_link+133} <ffffffff8013ba70>{autoremove_wake_function+0}
<ffffffff80168255>{vfs_read+197} <ffffffff80168403>{sys_read+83}
<ffffffff8010dbfe>{system_call+126}
Code: 48 8b 43 30 48 85 c0 74 0d 48 8b 40 28 48 85 c0 74 04 f0 ff
RIP <ffffffff80264beb>{as_move_to_dispatch+283} RSP <ffffffff80453268>
CR2: 0000000000000030
<3>Debug: sleeping function called from invalid context at include/linux/rwsem.h:43
in_atomic():1, irqs_disabled():1
Call Trace: <IRQ> <ffffffff8011f527>{__might_sleep+199} <ffffffff80126e79>{profile_task_exit+41}
<ffffffff80128d62>{do_exit+34} <ffffffff80245b75>{do_unblank_screen+53}
<ffffffff80329926>{do_page_fault+1830} <ffffffff80125f7d>{printk+141}
<ffffffff80120645>{activate_task+149} <ffffffff8010eaf1>{error_exit+0}
<ffffffff80264beb>{as_move_to_dispatch+283} <ffffffff80264c2d>{as_move_to_dispatch+349}
<ffffffff802650d6>{as_dispatch_request+1046} <ffffffff8025bbc3>{elv_next_request+307}
<ffffffff8029d238>{scsi_request_fn+136} <ffffffff8025f58d>{blk_run_queue+61}
<ffffffff8029d60f>{scsi_end_request+207} <ffffffff8029d899>{scsi_io_completion+617}
<ffffffff802b3d71>{sd_rw_intr+737} <ffffffff80296da6>{scsi_finish_command+198}
<ffffffff802977ac>{scsi_softirq+380} <ffffffff8012b0fb>{__do_softirq+107}
<ffffffff8010f137>{call_softirq+31} <ffffffff801105c1>{do_softirq+49}
<ffffffff8010e954>{apic_timer_interrupt+132} <EOI> <ffffffff803289ce>{_spin_unlock_irq+14}
<ffffffff8025fff0>{__make_request+1280} <ffffffff8025e2ce>{generic_make_request+382}
<ffffffff8025e3b8>{submit_bio+216} <ffffffff8018efcb>{dio_bio_submit+107}
<ffffffff8018ff29>{__blockdev_direct_IO+2601} <ffffffff80328979>{_read_unlock_irq+9}
<ffffffff8016f9f5>{blkdev_direct_IO+69} <ffffffff8016f860>{blkdev_get_blocks+0}
<ffffffff80146b7c>{generic_file_direct_IO+188} <ffffffff80148fa4>{__generic_file_aio_read+228}
<ffffffff8014922b>{generic_file_read+187} <ffffffff80328a9e>{_spin_lock_irqsave+14}
<ffffffff80329659>{do_page_fault+1113} <ffffffff8015b115>{vma_link+133}
<ffffffff8013ba70>{autoremove_wake_function+0} <ffffffff80168255>{vfs_read+197}
<ffffffff80168403>{sys_read+83} <ffffffff8010dbfe>{system_call+126}
Kernel panic - not syncing: Aiee, killing interrupt handler!
BUG: spinlock lockup on CPU#1, kblockd/1/124, ffff81003fe93260
Call Trace:<ffffffff8020698b>{_raw_spin_lock+235} <ffffffff8029d4a2>{scsi_request_fn+754}
<ffffffff802639c0>{as_work_handler+0} <ffffffff802639f5>{as_work_handler+53}
<ffffffff8013706c>{worker_thread+476} <ffffffff801209e0>{default_wake_function+0}
<ffffffff801209e0>{default_wake_function+0} <ffffffff8013b7a0>{keventd_create_kthread+0}
<ffffffff80136e90>{worker_thread+0} <ffffffff8013b7a0>{keventd_create_kthread+0}
<ffffffff8013b8f9>{kthread+217} <ffffffff8010eca6>{child_rip+8}
<ffffffff8013b7a0>{keventd_create_kthread+0} <ffffffff8013b820>{kthread+0}
<ffffffff8010ec9e>{child_rip+0}
-
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