Re: vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot

[Michael S. Tsirkin]

On Wed, Dec 18, 2019 at 03:43:43PM +0100, Christian Borntraeger wrote:
> Michael,
> 
> with 
> commit db7286b100b503ef80612884453bed53d74c9a16 (refs/bisect/skip-db7286b100b503ef80612884453bed53d74c9a16)
>     vhost: use batched version by default
> plus
> commit 6bd262d5eafcdf8cdfae491e2e748e4e434dcda6 (HEAD, refs/bisect/bad)
>     Revert "vhost/net: add an option to test new code"
> to make things compile (your next tree is not easily bisectable, can you fix that as well?).

I'll try.

> 
> I get random crashes in my s390 KVM guests after reboot.
> Reverting both patches together with commit decd9b8 "vhost: use vhost_desc instead of vhost_log" to
> make it compile again) on top of linux-next-1218 makes the problem go away.
> 
> Looks like the batched version is not yet ready for prime time. Can you drop these patches until
> we have fixed the issues?
> 
> Christian
> 

Will do, thanks for letting me know.

-- 
MST