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Message-ID: <52516C4A.6080508@gmail.com>
Date: Sun, 06 Oct 2013 21:57:30 +0800
From: Zhang Haoyu <ahzhanghaoyu@gmail.com>
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Subject: Re: [Qemu-devel] [Bug 1100843] Re: Live Migration Causes
 Performance Issues
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To: Bug 1100843 <1100843@bugs.launchpad.net>, gleb@redhat.com, eblake@redhat.com, quintela@redhat.com, pbonzini@redhat.com, afaerber@suse.de, xiaoguangrong@linux.vnet.ibm.com, mtosatti@redhat.com, kvm@vger.kernel.org, mst@redhat.com
Cc: qemu-devel <qemu-devel@nongnu.org>

>>>From my testing this has been fixed in the saucy version (1.5.0) of
qemu. It is fixed by this patch:
>f1c72795af573b24a7da5eb52375c9aba8a37972
>
>However later in the history this commit was reverted, and again broke
this. The other commit that fixes this is:
>211ea74022f51164a7729030b28eec90b6c99a08
>
See below post,please.
https://lists.gnu.org/archive/html/qemu-devel/2013-08/msg05062.html

Thanks,
Zhang Haoyu

>So 211ea740 needs to be backported to P/Q/R to fix this issue. I have a
v1 packages of a precise backport here, I've confirmed performance
differences between savevm/loadvm cycles:
>http://people.canonical.com/~arges/lp1100843/precise/
>
>** No longer affects: linux (Ubuntu)
>
>** Also affects: qemu-kvm (Ubuntu Precise)
>   Importance: Undecided
>       Status: New
>
>** Also affects: qemu-kvm (Ubuntu Quantal)
>   Importance: Undecided
>       Status: New
>
>** Also affects: qemu-kvm (Ubuntu Raring)
>   Importance: Undecided
>       Status: New
>
>** Also affects: qemu-kvm (Ubuntu Saucy)
>   Importance: High
>     Assignee: Chris J Arges (arges)
>       Status: In Progress
>
>** Changed in: qemu-kvm (Ubuntu Precise)
>     Assignee: (unassigned) => Chris J Arges (arges)
>
>** Changed in: qemu-kvm (Ubuntu Quantal)
>     Assignee: (unassigned) => Chris J Arges (arges)
>
>** Changed in: qemu-kvm (Ubuntu Raring)
>     Assignee: (unassigned) => Chris J Arges (arges)
>
>** Changed in: qemu-kvm (Ubuntu Precise)
>   Importance: Undecided => High
>
>** Changed in: qemu-kvm (Ubuntu Quantal)
>   Importance: Undecided => High
>
>** Changed in: qemu-kvm (Ubuntu Raring)
>   Importance: Undecided => High
>
>** Changed in: qemu-kvm (Ubuntu Saucy)
>     Assignee: Chris J Arges (arges) => (unassigned)
>
>** Changed in: qemu-kvm (Ubuntu Saucy)
>       Status: In Progress => Fix Released
>
>** Changed in: qemu-kvm (Ubuntu Raring)
>       Status: New => Triaged
>
>** Changed in: qemu-kvm (Ubuntu Quantal)
>       Status: New => Triaged
>
>** Changed in: qemu-kvm (Ubuntu Precise)
>       Status: New => In Progress