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Bug 245715

Summary: lvs syncdaemon causes 1.00 too high average load on system
Product: Red Hat Enterprise Linux 5 Reporter: Tuomo Soini <tis>
Component: kernelAssignee: Anton Arapov <anton>
Status: CLOSED ERRATA QA Contact: Martin Jenner <mjenner>
Severity: medium Docs Contact:
Priority: low    
Version: 5.0CC: david.kostal, dzickus, nhorman, nobody, tgraf
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
URL: http://lists.graemef.net/pipermail/lvs-users/2006-November/017787.html
Whiteboard:
Fixed In Version: RHBA-2008-0314 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-05-21 14:44:51 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: 425461    
Attachments:
Description Flags
Proposed patch none

Description Tuomo Soini 2007-06-26 09:39:43 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.0.12) Gecko/20070531 Foobar/1.5.0.12-0.1.0.foo4 Firefox/1.5.0.12

Description of problem:
Because of bug in kernel adding lvs syncdaemon causes high average load on system without actual load present. Load is 1.00 too high for lvs master and for both master and slave it's 2.00 too high.

Fix need to be backported to get load low again.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=89eaeb09ba01632511f69ce8e14c8d2abd2dbe9e

Version-Release number of selected component (if applicable):
kernel-2.6.18-8.1.6.el5

How reproducible:
Always


Steps to Reproduce:
1. start lvs sync master with command
# ipvsadm --start-daemon master -mcast-interface eth1 --syncid 0




Actual Results:
Average load goes to 1.00

Expected Results:
Average load should be 0.00 because there was no actual load

Additional info:
Comment 1 Anton Arapov 2007-08-17 11:22:41 UTC 
Created attachment 161726 [details]
Proposed patch
Comment 2 Jarod Wilson 2007-09-02 03:40:10 UTC 
*** Bug 247614 has been marked as a duplicate of this bug. ***
Comment 3 RHEL Program Management 2007-11-01 23:55:25 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.
Comment 5 Don Zickus 2007-11-29 17:06:12 UTC 
in 2.6.18-58.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 7 Mike Gahagan 2008-05-05 21:30:18 UTC 
confirmed fix is in the -92.el5 kernel
Comment 9 errata-xmlrpc 2008-05-21 14:44:51 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2008-0314.html