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Bug 726014 - Fix memleak on exit in virtio-balloon
Summary: Fix memleak on exit in virtio-balloon
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Amit Shah
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-07-27 10:25 UTC by Amit Shah
Modified: 2013-01-10 00:09 UTC (History)
6 users (show)

Fixed In Version: qemu-kvm-0.12.1.2-2.179.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-12-06 15:54:45 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:1531 0 normal SHIPPED_LIVE Moderate: qemu-kvm security, bug fix, and enhancement update 2011-12-06 01:23:30 UTC

Description Amit Shah 2011-07-27 10:25:41 UTC 
Description of problem:

Unplugging a virtio-balloon device or exiting qemu doesn't free some RAM.  Adding an exit handler that calls virtio_cleanup() fixes the leak.
Comment 5 Shaolong Hu 2011-09-09 08:19:08 UTC 
Verification of this bug is blocked by bug 736975.
Comment 6 Shaolong Hu 2011-10-10 04:50:22 UTC 
According to:
https://bugzilla.redhat.com/show_bug.cgi?id=736975#c8

Bug 736975 has been fixed.

Reproduce and verify using steps in:
https://bugzilla.redhat.com/show_bug.cgi?id=726020#c7

Since from qemu 160, all version suffers from bug 736975, cannot reproduce this as a contrast, just verify the patch.

Verify on qemu-kvm-0.12.1.2-2.193.el6.x86_64:

used    free    buffers/cached             
181     7281          0/6             <---before start qemu
735     6726          0/9             <---start qemu
731     6730          0/9             <---after hotplug/unplug 300 times
182     7279          0/6             <---after exit qemu

According to above results, the patch works fine, verified.

However, there is another issue, once i did 300 times hotplug/unplug and check the result next morning, the used/free memory are 914/6547, i did two times more and check the result immediately after it finished, it looks like above one, seems when idle, qemu-kvm has memory leak? I will investigate this further. Any advice please let me know.
Comment 7 juzhang 2011-10-11 04:55:00 UTC 
(In reply to comment #6)
> According to:
> https://bugzilla.redhat.com/show_bug.cgi?id=736975#c8
> 
> Bug 736975 has been fixed.
> 
> Reproduce and verify using steps in:
> https://bugzilla.redhat.com/show_bug.cgi?id=726020#c7
> 
> Since from qemu 160, all version suffers from bug 736975, cannot reproduce this
> as a contrast, just verify the patch.
> 
> Verify on qemu-kvm-0.12.1.2-2.193.el6.x86_64:
> 
> used    free    buffers/cached             
> 181     7281          0/6             <---before start qemu
> 735     6726          0/9             <---start qemu
> 731     6730          0/9             <---after hotplug/unplug 300 times
> 182     7279          0/6             <---after exit qemu
> 
> According to above results, the patch works fine, verified.
> 
> However, there is another issue, once i did 300 times hotplug/unplug and check
> the result next morning, the used/free memory are 914/6547, i did two times
> more and check the result immediately after it finished, it looks like above
> one, seems when idle, qemu-kvm has memory leak? I will investigate this
> further. Any advice please let me know.
I will set this issue as verified.about the potential issue,if you can identify it,please spilt it.
Comment 9 errata-xmlrpc 2011-12-06 15:54:45 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1531.html
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