Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
For bugs related to Red Hat Enterprise Linux 5 product line. The current stable release is 5.10. For Red Hat Enterprise Linux 6 and above, please visit Red Hat JIRA https://issues.redhat.com/secure/CreateIssue!default.jspa?pid=12332745 to report new issues.

Bug 536835

Summary: vmchannel - messages sent via vmchannel stuck when the guest driver is uninstalled
Product: Red Hat Enterprise Linux 5 Reporter: Barak <bazulay>
Component: kvmAssignee: Tim Burke <tburke>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: low    
Version: 5.5CC: tburke, virt-maint, ykaul
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-12-30 10:44:15 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: 481840    

Description Barak 2009-11-11 14:59:14 UTC 
Description of problem:

The problem occurs on RHEVM system (kvm-83-105.el5_4.9) running windows guest (tested on XP but happens also on other win OSs).
It does not happen on all the hosts (race?)
 


Version-Release number of selected component (if applicable):


How reproducible:

1. Create an XP vm and install the guestAgent (which also installs the vmchannel guest driver)in it.
2. use VDSM log to track messages arriving via vmchannel - or write a simple program that reads the vmchannel.
3. uninstall the guestAgent (a message is sent via vmchannel indicating agent uninstalled)
4. Often the message does not get to the host side socket.
6. when reinstalling the guestAgent the lost message automagically arrives to host side socket
   

another way to reproduce this issue is to write a small program in guest to send messages , track those messages on the host level, and then while sending the messages uninstall the driver.

   

  
Actual results:
massages delayed when the the vmchannel driver is uninstalled

Expected results:
messages should get to the host side socket even if the driver was uninstalled




Additional info:
Comment 2 Dor Laor 2009-12-30 10:44:15 UTC 
It will be solved once (now posted) bz550755 solved

*** This bug has been marked as a duplicate of bug 550755 ***