Messages in this thread | | | Date | Fri, 2 Mar 2012 21:08:26 +0100 | From | Bastian Blank <> | Subject | Re: [Pkg-xen-devel] ioatdma: Boot process hangs then reboots when using Xen + Linux 3.2 |
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On Fri, Mar 02, 2012 at 11:31:56AM -0800, Dan Williams wrote: > On Fri, Mar 2, 2012 at 9:57 AM, Bastian Blank <waldi@debian.org> wrote: > > phys_complete (a 32 bit value) gets compared to struct > > dma_async_tx_descriptor.phys, which is defined as dma_addr_t, a _64_ bit > > value. > The assumption is that the driver's control structures are not in high > memory so all address values will only have 32-bits of valid data,
Can you back that up by some kernel documentation? There is a reason why pci_alloc_pool uses dma_addr_t to store the address and _not_ unsigned long. This are physical addresses, nothing the kernel can access directly without a mapping.
> but > maybe xen32 changes that assumption?
Xen changes a lot of things in the memory management. This includes that physical != machine addresses, where i915 failed horrible.
> Can you send the log of the driver load with debug enabled?
No, I don't have that hardware.
Bastian
-- Each kiss is as the first. -- Miramanee, Kirk's wife, "The Paradise Syndrome", stardate 4842.6
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