Bug 531419

Summary: qemu issue with non-virtio NICs receiving heavy traffic volumes
Product: [Fedora] Fedora Reporter: Mark McLoughlin <markmc>
Component: qemuAssignee: Mark McLoughlin <markmc>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: high    
Version: rawhideCC: 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