Xen MSI-x do not receive interrupt
Bug #1703280 reported by
oxz
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| xen (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
[Impact]
With ubuntu 14.04 , install Xen 4.4 hypervisor and create VM (guset OS) with 14.04. Then let the NMEe
SSD passthough in guest OS. NVMe SSD MSI-x use wrong number of interrupts and can't recive any
interrupts by FIO test.
[Test Case]
1. NVMe driver load in Guest OS ,do FIO test with NVME0n1.
2. "cat /proc/interrupt | grep nvme" shows 21 MSI-X interrupts but VCPU is only 10.
3. When FIO test is made ,the MSI-X interrupts is not increasing. IOPS is unstable , it is jumping
change.
4. unload NVMe driver,and insmod it again, dmesg show "Xen PCI frontend has not registered MSI/MSI-X
support" . "cat /proc/interrupt | grep nvme" shows only 1 xen pirq ioapic interrupt.
[Regression Potential]
no
[Other Info]
no
Revision history for this message
| oxz (oxz1918) wrote | #1 |
Revision history for this message
| Ubuntu Foundations Team Bug Bot (crichton) wrote | #2 |
| tags: | added: patch |
Revision history for this message
| Andreas Hasenack (ahasenack) wrote | #3 |
| affects: | qemu (Ubuntu) → xen (Ubuntu) |
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