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Re: Serious AMD-Vi issue



On Thu, Jan 25, 2024 at 12:24:53PM -0800, Elliott Mitchell wrote:
> Apparently this was first noticed with 4.14, but more recently I've been
> able to reproduce the issue:
> 
> https://bugs.debian.org/988477
> 
> The original observation features MD-RAID1 using a pair of Samsung
> SATA-attached flash devices.  The main line shows up in `xl dmesg`:
> 
> (XEN) AMD-Vi: IO_PAGE_FAULT: DDDD:bb:dd.f d0 addr ffffff???????000 flags 0x8 I

I think I've figured out the cause for those faults, and posted a fix
here:

https://lore.kernel.org/xen-devel/20250124120112.56678-1-roger.pau@xxxxxxxxxx/

Fix is patch 5/5, but you likely want to take them all to avoid
context conflicts.

Can you give it a try and see if it fixes the fault messages, plus
your issues with the disk devices?

Regards, Roger.



 


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