Bug 531419

Summary:	qemu issue with non-virtio NICs receiving heavy traffic volumes
Product:	[Fedora] Fedora	Reporter:	Mark McLoughlin <markmc>
Component:	qemu	Assignee:	Mark McLoughlin <markmc>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	high
Version:	rawhide	CC:	berrange, dwmw2, gcosta, itamar, jaswinder, jforbes, markmc, quintela, scottt.tw, virt-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-0.11.0-9.fc12	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-10-30 12:37:48 EDT	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---
Bug Depends On:
Bug Blocks:	498969

Description Mark McLoughlin 2009-10-28 04:45:57 EDT

With qemu-0.11.0, if a non-virtio NIC's receive queue overflows, packets are dropped

Full discussion here:

  http://lists.gnu.org/archive/html/qemu-devel/2009-10/msg02195.html
  http://lists.gnu.org/archive/html/qemu-devel/2009-10/threads.html#02336

This is the patch we need:

  http://lists.gnu.org/archive/html/qemu-devel/2009-10/msg02340.html

Comment 1 Mark McLoughlin 2009-10-29 07:53:38 EDT

Building, will request tagging later

* Thu Oct 29 2009 Mark McLoughlin <markmc@redhat.com> - 2:0.11.0-9
- Fix dropped packets with non-virtio NICs (#531419)

Comment 2 Scott Tsai 2009-10-29 20:07:20 EDT

I've verified this koji build:
http://koji.fedoraproject.org/koji/buildinfo?buildID=138849
and it indeed fixes my test case of NFS through emulated smc91c111 NIC on arm-integratorcp.

I also ran through my normal usage for 'qemu-system-arm' and everything works:
* Load u-boot into the emulator through qemu's gdbserver interface
* Verify that u-boot can drive the emulated serial device and NIC then TFTP boot Linux

Comment 3 Mark McLoughlin 2009-10-30 11:46:23 EDT

tag request: https://fedorahosted.org/rel-eng/ticket/2926