Re: [Qemu-devel] [Bug 1396052] [NEW] migration failed when running BurnInTest in guest

[Stefan Hajnoczi]

On Thu, Nov 27, 2014 at 02:50:59PM +0530, Amit Shah wrote:
> On (Tue) 25 Nov 2014 [09:32:58], z08687 wrote:
> > Public bug reported:
> > 
> > Hi,  
> > I found a live migration problem and have found out the reason, but I can't 
> > fix it up myself. I really need help.
> > When live migration vm and it's block device in save time, it will occur 
> > probabilistic .
> > 
> > Step:
> > 1.  start a windows vm,and run burnInTest(it will write dirty data to block 
> > device in migration)
> > 2.  migrate vm with it's block device.
> > 3.  a few minutes later,  dest vm was killed and migration will be failed 
> > (probabilistic )
> 
> That's a nice test case, as well as good analysis.

This is a known issue:
https://lists.gnu.org/archive/html/qemu-devel/2014-09/msg02959.html

Please try this patch:

  commit 7ea2d269cb84ca7a2f4b7c3735634176f7c1dc35
  Author: Alexey Kardashevskiy <address@hidden>
  Date:   Thu Oct 9 13:50:46 2014 +1100

    block/migration: Disable cache invalidate for incoming migration

Stefan

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