[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] Re: Stability of migration?



I should have made clear I am testing on x86_64.

John

John Byrne wrote:

Hi,

With xen-unstable changset 10333:360f9dc71f51, live migration is not reliable. Migrating an active domain (I use a kernel build in my test) back and forth between two machines will result in the build or the domain crashing. I tweaked xc_linux_save.c to enable the verify pass without outputting all the debugging messages and I can see that one or two pages do not get a data match in the log.

I have yet to see a failure of the domain with non-live migration, but I sometimes see a data mismatch on a page during the verification. Which would indicate that either suspend doesn't mean what I think it does or pages of a suspended VM are being altered when they shouldn't be.

So, I guess I'll start with the easy question: should non-live migration ever have a page fail to verify? If not, how can I identify the source of the problem?

The harder question: how to identify the source of the corruption in live migration?

Thanks,

John Byrne



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.