On 09/08/09 12:34, Konrad Rzeszutek Wilk wrote:
On Tue, Sep 08, 2009 at 10:22:46PM +0300, Pasi Kärkkäinen wrote:
> On Tue, Sep 08, 2009 at 12:14:54PM -0700, Boris Derzhavets wrote:
>
>> Console drops into the same stack trace in both cases.
>>
>>
> Jeremy: Any ideas could some recent change in pv_ops dom0 kernel cause
> usb stuff to stop working with >4096M of dom0 memory?
>
The last set of changes in Jeremy's kernel are a set of patches I sent,
so the problem is most likely caused by my work.
Yes, I suspect so. Last time around, USB was good for highlighting
problems in the swiotlb code. If there's a problem at 4G then generally
its some physical address being accidentally truncated by an implicit
cast in the middle of an expression. Or something else.
(Why, yes, I am helpful today.)
J
A dmesg from both Xen and Linux kernel would be most helpfull. Also
a lspci -vvv would be nice.
And as Pasi suggested, booting the same kernel without Xen would
be most helpful.
> dom0_mem=4096M works
> dom0_mem=4097M fails with stacktrace
>
> Boris: What was the last kernel that worked without backtraces?
> Also, does that same kernel work as baremetal (without Xen) ?
>
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