[Xen-bugs] [Bug 372] Dom0 reboots instantly when accessing SCSI DLT tape drive

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=372





------- Additional Comments From nospam@xxxxxxxxxxxxxx  2005-11-28 17:39 -------
(In reply to comment #5)

     This is the output to the serial console during the error:

st0: MTSETDRVBUFFER only allowed for root.
Fatal DMA error! Please use 'swiotlb=force'
kernel BUG at arch/xen/i386/kernel/pci-dma.c:270 (dma_map_single)!
 [<c010efb6>] dma_map_single+0xf6/0x160
 [<c030ed8d>] ahc_linux_run_command+0x34d/0x830
 [<c030d295>] ahc_linux_queue+0x75/0xe0
 [<c03fc91f>] _spin_lock_irqsave+0x4f/0x120
 [<c02e6b20>] scsi_done+0x0/0x30
 [<c02e6859>] scsi_dispatch_cmd+0x189/0x300
 [<c02e6b20>] scsi_done+0x0/0x30
 [<c02ea090>] scsi_times_out+0x0/0xc0
 [<c02edb03>] scsi_request_fn+0x203/0x410
 [<c0299965>] __elv_add_request+0xa5/0xe0
 [<c029cf88>] blk_insert_request+0xc8/0x120
 [<c02ec308>] scsi_insert_special_req+0x38/0x40
 [<c03191a4>] st_do_scsi+0xf4/0x1c0
 [<c0319060>] st_sleep_done+0x0/0x50
 [<c031b177>] read_tape+0xf7/0x4e0
 [<c031a84b>] setup_buffering+0x14b/0x1c0
 [<c031b791>] st_read+0x231/0x3f0
 [<c016de91>] vfs_read+0xb1/0x130
 [<c016e19b>] sys_read+0x4b/0x80
 [<c010a0a5>] syscall_call+0x7/0xb
Kernel panic - not syncing: BUG!
 Badness in smp_call_function at arch/xen/i386/kernel/smp.c:511
 [<c0111b02>] smp_call_function+0x142/0x150
 [<c02881b4>] do_unblank_screen+0x14/0x140
 [<c0111bb6>] smp_send_stop+0x26/0xc0
 [<c0111b10>] stop_this_cpu+0x0/0x80
 [<c0118ff4>] bust_spinlocks+0x44/0x50
 [<c0125ad4>] panic+0x64/0x170
 [<c010efc2>] dma_map_single+0x102/0x160
 [<c030ed8d>] ahc_linux_run_command+0x34d/0x830
 [<c030d295>] ahc_linux_queue+0x75/0xe0
 [<c03fc91f>] _spin_lock_irqsave+0x4f/0x120
 [<c02e6b20>] scsi_done+0x0/0x30
 [<c02e6859>] scsi_dispatch_cmd+0x189/0x300
 [<c02e6b20>] scsi_done+0x0/0x30
 [<c02ea090>] scsi_times_out+0x0/0xc0
 [<c02edb03>] scsi_request_fn+0x203/0x410
 [<c0299965>] __elv_add_request+0xa5/0xe0
 [<c029cf88>] blk_insert_request+0xc8/0x120
 [<c02ec308>] scsi_insert_special_req+0x38/0x40
 [<c03191a4>] st_do_scsi+0xf4/0x1c0
 [<c0319060>] st_sleep_done+0x0/0x50
 [<c031b177>] read_tape+0xf7/0x4e0
 [<c031a84b>] setup_buffering+0x14b/0x1c0
 [<c031b791>] st_read+0x231/0x3f0
 [<c016de91>] vfs_read+0xb1/0x130
 [<c016e19b>] sys_read+0x4b/0x80
 [<c010a0a5>] syscall_call+0x7/0xb
smp_send_stop disable_local_APIC
stop_this_cpu disable_local_APIC
(XEN) Domain 0 shutdown: rebooting machine.
(XEN) Reboot disabled on cmdline: require manual reset

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