Bug 598100 - Cannot do more than ~30 NIC hotplugs
Cannot do more than ~30 NIC hotplugs
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: xenpv-win (Show other bugs)
5.4
All Linux
low Severity medium
: rc
: ---
Assigned To: Paolo Bonzini
Virtualization Bugs
:
Depends On: 595780
Blocks: 518407
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Reported: 2010-05-31 08:32 EDT by Paolo Bonzini
Modified: 2011-02-01 04:00 EST (History)
5 users (show)

See Also:
Fixed In Version: 1.3.0-1
Doc Type: Bug Fix
Doc Text:
Previously, more than 30 cycles network card hot-plug and hot-unplug caused the guest to reject any further hotplug. With this update, the RHELSCSI driver can sustain repeated cycles of network card hot-plug and hot-unplug.
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Clone Of:
Environment:
Last Closed: 2011-02-01 04:00:59 EST
Type: ---
Regression: ---
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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Description Paolo Bonzini 2010-05-31 08:32:53 EDT
The drivers cannot do more than approx. 30 hotplugs/hotunplugs.

This is due to some leak in grant table entries.
Comment 3 Florian Nadge 2010-10-18 12:28:21 EDT
    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:
Previously, more than 30 cycles network card hot-plug and hot-unplug caused the guest to reject any further hotplug. With this update, the RHELSCSI driver can sustain repeated cycles of network card hot-plug and hot-unplug.
Comment 4 YangGuang 2010-10-20 04:37:50 EDT
Version-Release number of selected component:
xen-3.0.3-117.el5
kernel-xen-2.6.18-228.el5
xenpv-win: 1.2.0
guest: Windows2008r2 HVM

Detailed steps:
1. Edit the vm's config file to install xenpv-win, change the disk
specification like
    disk=['file:...', 'file:/usr/share/xenpv-win/xenpv-win.iso,hdc:cdrom,r',
       'file:/usr/share/xenpv-win/xenpv-win-debug.iso,hdd:cdrom,r']
2. Start the vm with xm create command:
   [host]# xm create $vm-config
3. Open "My Computer", double click "xenpv-win-1.2.0(D:)(CDROM Drive)"
 Or Open CD Drive, then double click xenpv-win.exe
   Then the installer start the installation process, choose "next" all the
way.
4. Execute hot-plug and hot-unplug 500 times.
   [host]# xm pci-attach $domU $dev
   [host]# xm pci-detach $domU $dev
5. using vncviewer to login the guest vm and check.

Detailed result:
1. The guest works well and blue-screen doesn't occur.

I cannot reproduce this bug, so change it to verified.
Comment 5 errata-xmlrpc 2011-02-01 04:00:59 EST
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-2011-0187.html

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