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

[Christian Borntraeger]

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 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