Bug 499637

Summary:	IOMMU: no free domain ids
Product:	[Fedora] Fedora	Reporter:	Mark McLoughlin <markmc>
Component:	kernel	Assignee:	David Woodhouse <dwmw2>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	11	CC:	itamar, kernel-maint, virt-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-09-22 13:36:51 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	480594

Description Mark McLoughlin 2009-05-07 14:21:26 UTC

After doing a bunch of KVM PCI device assignment test according to:

https://fedoraproject.org/wiki/Test_Day:2009-05-07_Virtualization_KVM_PCI_Device_Assignment

I eventually got:

e1000e 0000:00:19.0: PCI INT A disabled
e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
e1000e 0000:00:19.0: setting latency timer to 64
e1000e 0000:00:19.0: irq 29 for MSI/MSI-X
0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:13:20:f5:f9:5a
0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
0000:00:19.0: eth0: MAC: 6, PHY: 6, PBA No: ffffff-0ff
IOMMU: no free domain ids
Allocating domain for 0000:00:19.0 failed<3>0000:00:19.0: eth0: Unable to allocate memory for the transmit descriptor ring

During the testing the device is regularly being unbound from and bound to the e1000e driver in the host.

Are we forgetting to release a domain ID when unbinding the device?

Comment 1 Chuck Ebbert 2009-05-08 15:36:13 UTC

Fixed by commit 3199aa6bc8766e17b8f60820c4f78d59c25fce0e ("intel-iommu: fix PCI device detach from virtual machine")? But the comment for that says it fails after being assigned once...

Comment 2 Bug Zapper 2009-06-09 15:20:23 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.

More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Comment 3 Mark McLoughlin 2009-09-22 13:36:51 UTC

Okay, that fix is in 2.6.30. Hopefully this is fixed now, I haven't seen it since