Re: [Xen-devel] Using debug-key 'o: Dump IOMMU p2m table, locks up machine

[Wei Wang <wei.wang2@xxxxxxx>]

On 09/04/2012 06:43 PM, Sander Eikelenboom wrote:
> Hello Wei,
> >
> Tried it and it doesn't help.
> I now even got a "xl dmesg" which shows a IO_PAGE_FAULT occuring very early, 
> before any toolstack or guest can be involved:
>
> (XEN) [2012-09-04 15:51:17] AMD-Vi: Setup I/O page table: device id = 0x0a05, 
> root table = 0x24d84b000, domain = 0, paging mode = 3
> (XEN) [2012-09-04 15:51:17] AMD-Vi: Setup I/O page table: device id = 0x0a06, 
> root table = 0x24d84b000, domain = 0, paging mode = 3
> (XEN) [2012-09-04 15:51:17] AMD-Vi: Setup I/O page table: device id = 0x0a07, 
> root table = 0x24d84b000, domain = 0, paging mode = 3
> (XEN) [2012-09-04 15:51:17] AMD-Vi: Setup I/O page table: device id = 0x0b00, 
> root table = 0x24d84b000, domain = 0, paging mode = 3
> (XEN) [2012-09-04 15:51:17] Scrubbing Free RAM: 
> ...........................<0>AMD-Vi: IO_PAGE_FAULT: domain = 0, device id = 
> 0x0a06, fault address = 0xc2c2c2c0

you have dom0_mem=1024M, so you could try to remove this line any see if 
it disappears. It would also be helpful to provide a lspci output from 
your system.
Thanks,
Wei

> (XEN) [2012-09-04 15:51:18] ............................................done.
> (XEN) [2012-09-04 15:51:19] Initial low memory virq threshold set at 0x4000 
> pages.
> (XEN) [2012-09-04 15:51:19] Std. Loglevel: All
> (XEN) [2012-09-04 15:51:19] Guest Loglevel: All
> (XEN) [2012-09-04 15:51:19] Xen is relinquishing VGA console.
>
>
> Complete dmesg attached.
>
> > Thanks,
> > Wei
> > > >    -- Keir
> > > > > >    -- Keir


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