Bug 666800 - [5.4][Xen]When many guests are created by "xm create", the boot time increases quadratically with the number of total VBDs
Summary: [5.4][Xen]When many guests are created by "xm create", the boot time increase...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: xen
Version: 5.4
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Xen Maintainance List
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 661927 671337 672537 678282 680927
Blocks: 514499
TreeView+ depends on / blocked
 
Reported: 2011-01-03 09:05 UTC by RHEL Program Management
Modified: 2018-11-14 16:41 UTC (History)
12 users (show)

Fixed In Version: xen-3.0.3-94.el5_4.4
Doc Type: Bug Fix
Doc Text:
With a large number of virtual block devices (VBDs) or virtual guests, looking for duplicate devices could take a very long time and significantly increase overall boot time. With this update, this procedure has been optimized not to require XenStore, so that virtual guests now boot much faster. Additionally, this update also ensures that the domain record counter contains a correct value when a XenStore transaction is canceled. Note that when you add a network interface controller (NIC) with an automatically generated MAC address, this address is not verified. Avoid using a combination of hard-coded and automatically assigned MAC addresses, as this can lead to a guest network failure.
Clone Of:
Environment:
Last Closed: 2011-03-08 10:20:36 UTC
Target Upstream Version:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0326 0 normal SHIPPED_LIVE xen bug fix update 2011-03-08 10:20:24 UTC

Description RHEL Program Management 2011-01-03 09:05:18 UTC 
This bug has been copied from bug #661927 and has been proposed
to be backported to 5.4 z-stream (EUS).
Comment 10 Miroslav Rezanina 2011-02-04 17:28:12 UTC 
At http://people.redhat.com/mrezanin/bz666800 are 5.4.z rpms with all fixes. Can FJ please test this packages? 

FJ requesting release till 21st Feb. Are they aware that xen is not bind to kernel and can be released independently to kernel?
Comment 20 Miroslav Rezanina 2011-02-14 06:10:30 UTC 
Hi Qixiang,
532648 is not candidate to 5.4.z backport. This fix can be verified even with this problem.
Comment 21 Qixiang Wan 2011-02-14 06:53:10 UTC 
change to VERIFIED per comment 20.
Comment 31 Jaromir Hradilek 2011-03-07 22:11:03 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
With a large number of virtual block devices (VBDs) or virtual guests, looking for duplicate devices could take a very long time and significantly increase overall boot time. With this update, this procedure has been optimized not to require XenStore, so that virtual guests now boot much faster. Additionally, this update also ensures that the domain record counter contains a correct value when a XenStore transaction is canceled. Note that when you add a network interface controller (NIC) with an automatically generated MAC address, this address is not verified. Avoid using a combination of hard-coded and automatically assigned MAC addresses, as this can lead to a guest network failure.
Comment 32 errata-xmlrpc 2011-03-08 10:20:36 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 therefore 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-2011-0326.html
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