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

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

I was trying to use the 'o' debug key to make a bug report about an "AMD-Vi: 
IO_PAGE_FAULT".

The result:
- When using "xl debug-keys o", the machine seems in a infinite loop, can 
hardly login, eventually resulting in a kernel RCU stall and complete lockup.
- When using serial console: I get a infinite stream of "gfn:  mfn: " lines, 
mean while on the normal console, S-ATA devices are starting to give errors.

So either option trashes the machine, other debug-keys work fine.

Machine has a 890-fx chipset and AMD phenom x6 proc.

xl dmesg with bootup and output from some other debug-keys is attached.

--

Sander

Attachment: xl-dmesg.txt
Description: Text document

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