[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1943729
Title:
AMD impish Libvirt7.6 nested amd-v, rbd storage broken
Status in ceph package in Ubuntu:
Expired
Status in libvirt package in Ubuntu:
Expired
Status in linux package in Ubuntu:
Expired
Status in qemu package in Ubuntu:
Expired
Bug description:
Hello,
Having issues with AMD and RBD Driver. Running on latest impish, using
libvirt7.6ubuntu1.
Having following setup (not sure if matters):
Dedicated-Host (AMD) -> Level1-KVM (cpu-pass-through, rbd) ->
"Customer-VM"=CVM
ubuntu20.04 -> impish -> custom
What happens?
It seems Level1-KVM is struggeling with RBD storage access,
breaking/preventing CVM's operating system to fully boot. Half of the
booting process is going through, but later at random point in time
(still booting the kernel) it seems to deadlock, letting CVM's CPU
spin endless.
Following tests setups i verified to isolate the issue:
Dedicated-Host (Intel) -> Level1-KVM (impish=7.6,cpu-pass-through,
rbd=virtio) -> CVM = works
Dedicated-Host (AMD) -> Level1-KVM (impish=7.6,cpu-pass-through,
direct storage=virtio) -> CVM = works
Dedicated-Host (Intel) -> Level1-KVM (focal=6.0,cpu-pass-through, rbd=virtio)
-> CVM = works
Dedicated-Host (AMD) -> Level1-KVM (focal=6.0,cpu-pass-through,
rbd=virtio) -> CVM = works
Dedicated-Host (AMD) -> Level1-KVM (focal=6.0,cpu-pass-through, direct
storage=virtio) -> CVM = works
-----------------------------------------------
Dedicated-Host (AMD) -> Level1-KVM (impish=7.6,cpu-pass-through,
rbd=virtio) -> CVM = stuck
Out of those tests, the issue seems to be IMO located in libvirt 7.6,
sadly im not able to check it against 7.4 (which was shortly available
for impish, but was already removed from the repo mirror..).
Any idears what could make an AMD passthrough break access of RBD,
letting CVM stuck accessing storage?
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