Re: [Xen-users] Re: Live migration failed

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Dec 23, 2009 at 11:17:47AM +0100, Alessandro Storti Gajani wrote:
> Hi
> The only issues I had with live migration seems to be bound to the
> kernel I use on DomU.
> 
> I tried these tests with live migration:
> (I'm using Gentoo)
> 
> -paravirtualized with xen patched kernel 2.6.18: OK
> -paravirtualizad with newer xen patched kernel: FAIL

What "newer xen patched kernels" did you try? 

> -paravirtualized with vanilla kernel 2.6.32.2: OK
> -paravirtualized with vanilla kernel older than 2.6.32.2: FAIL

2.6.32.2 has patches for save/restore, which also affects live
migration. So 2.6.32.2 should work, while older 2.6.31./2.6.32.x kernels
will fail.

-- Pasi

> -hvm linux32, linux64 or win32: OK (but i/o performances over nfs are
> awful).
> 
> Hope this helps in any way.
> 
> Actually, I'm not sure all the kernels were compiled with THE SAME
> features (I had so many tests, and I'm running out of time, so the first
> working...) :)
> 
> Cheers
> 
> -- 
> Alessandro Storti Gajani
> Politecnico di Milano - Dipartimento di Ingegneria Strutturale
> 
> E-Mail: alex@xxxxxxxxxxxxxx
>       alessandro.stortigajani@xxxxxxxxx
> 
> Tel. +39 02 2399 4313
> 
>               "My word and world holds ground and is real
>               Your word is like floods of poisoned water
>               A language spoken with spit from different tongues"
> 
> Irwan Hadi wrote:
> > Actually after further research, it looks like this maybe a known
> > issue that affect when the originating dom0 has bigger memory than the
> > receiving dom0
> > In my case, the vmhost1 dom0 has much bigger memory, and I'm in the
> > process of standardizing the dom0 memory that we have in the grub.conf
> > when I hit this bug.
> > I suppose until this bug is fix, I will have to do xm save/restore so
> > that the domu won't crashed...
> > 
> > Something weird I found though is that after domu crashed and
> > rebooted, the live migration of it then will work fine.
> > Does anyone else ever have the same issue?
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=511135
> > 
> > 
> 
> 
> 
> 
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