[Bug 37402] New: kernel BUG at drivers/pci/intel-iommu.c:1656 while registering memory for InfiniBand

[Bug 37402] New: kernel BUG at drivers/pci/intel-iommu.c:1656 while registering memory for InfiniBand

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=37402

           Summary: kernel BUG at drivers/pci/intel-iommu.c:1656 while
                    registering memory for InfiniBand
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.38.6-26.rc1.fc15.x86_64
          Platform: All
        OS/Version: Linux
              Tree: Fedora
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Infiniband/RDMA
        AssignedTo: drivers_infiniband-rdma-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
        ReportedBy: fullung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        Regression: No


Created an attachment (id=61782)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=61782)
Crash dump

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Re: [Bug 37402] New: kernel BUG at drivers/pci/intel-iommu.c:1656 while registering memory for InfiniBand

[Roland Dreier]

Hi intel-iommu guys,

It seems that the user is getting this BUG when doing something that
essentially does
dma_map_sg() for 1GB of memory.  AFAICT, the mlx4 driver is correctly doing

	pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));

during init, but the BUG being hit here is:

	BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width);

Any suggestions on what might be going wrong here?

Thanks,
  Roland

On Mon, Jun 13, 2011 at 1:37 AM,  <bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=37402
>
>           Summary: kernel BUG at drivers/pci/intel-iommu.c:1656 while
>                    registering memory for InfiniBand
>           Product: Drivers
>           Version: 2.5
>    Kernel Version: 2.6.38.6-26.rc1.fc15.x86_64
>          Platform: All
>        OS/Version: Linux
>              Tree: Fedora
>            Status: NEW
>          Severity: normal
>          Priority: P1
>         Component: Infiniband/RDMA
>        AssignedTo: drivers_infiniband-rdma-ztI5WcYan/vQLgFONoPN6+46SIhDJjyZ@public.gmane.orgrg
>        ReportedBy: fullung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
>        Regression: No
>
>
> Created an attachment (id=61782)
>  --> (https://bugzilla.kernel.org/attachment.cgi?id=61782)
> Crash dump
>
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> Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
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