[Xen-bugs] [Bug 168] kernel BUG at arch/xen/i386/kernel/pci-dma.c:30 (iommu_bug)!

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=168





------- Additional Comments From dbarrera@xxxxxxxxxx  2005-08-19 19:18 -------
(In reply to comment #5)
> Created an attachment (id=44)
 --> (http://bugzilla.xensource.com/bugzilla/attachment.cgi?id=44&action=view) 
[edit]
> debug patch
> 
> David with out trying to create domU, can you just stress the IO devices and
> see if you hit the same issue?
> 
> And also can you try collecting the log with this debug patch.

OK. Here's the log from a test with patch

dma_mask is ffffffff
dma_addr is 80011eb7000
Fatal DMA error! Please use 'swiotlb=force'
kernel BUG at arch/xen/i386/kernel/pci-dma.c:63 (dma_map_sg)!
 [<c010effa>] dma_map_sg+0x13a/0x1f0
 [<c038ee25>] ahd_linux_run_device_queue+0x265/0x820
 [<c0283a03>] as_remove_queued_request+0x83/0x170
 [<c03882c5>] ahd_linux_queue+0x1b5/0x2d0
 [<c032b638>] scsi_dispatch_cmd+0x178/0x2c0
 [<c032b8b0>] scsi_done+0x0/0x30
 [<c032e860>] scsi_times_out+0x0/0xc0
 [<c022b497>] kobject_get+0x17/0x20
 [<c03322d1>] scsi_request_fn+0x1f1/0x550
 [<c027ccda>] generic_unplug_device+0x2a/0x70
 [<c027ccb0>] generic_unplug_device+0x0/0x70
 [<c0309a46>] blkio_schedule+0x186/0x190
 [<c011e7e0>] default_wake_function+0x0/0x20
 [<c010aba2>] ret_from_fork+0x6/0x14
 [<c011e7e0>] default_wake_function+0x0/0x20
 [<c03098c0>] blkio_schedule+0x0/0x190
 [<c0108b45>] kernel_thread_helper+0x5/0x10
Kernel panic - not syncing: BUG!
 (XEN) Domain 0 shutdown: rebooting machine.


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