Re: Hung task in 4.9 using kvm 5.2

[Christoph Mathys <eraserix@xxxxxxxxx>]

I'm unable to reproduce "BUG: unable to handle kernel paging request" 
when I use 4.9.178-rt131, so I'm inclined to think that it got 
introduced somewhere along the way to 4.9.271-rt182.

The problem with "hung task" is also gone when I don't force qemu 5.2 to 
use cache.direct=true and aio=native. Qemu 2.1 from Debian Jessie does 
not trigger this problem on the same system.

Christoph