Public bug reported:
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?
** Affects: libvirt (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
Hello,
-
- Having issues with AMD and RBD Driver. Running on latest impish, using
libvirt7.6ubuntu1.
+ 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 (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 (impish=7.6,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 (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..).
+ 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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https://bugs.launchpad.net/bugs/1943729
Title:
AMD impish Libvirt7.6 nested amd-v, rbd storage broken
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