Re: [Xen-devel] 33 VCPUs in HVM guests with live migration with Linux hangs

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-04-04 at 16:44 -0400, Konrad Rzeszutek Wilk wrote:
> The only culprit I could think of was commit 
> d5b17dbff83d63fb6bf35daec21c8ebfb8d695b5
>     "xen/smp/pvhvm: Don't point per_cpu(xen_vpcu, 33 and larger) to 
> shared_info"
> 
> which I had reverted - but that did not help.

Looking at the commit log that isn't surprising. That message hints that
there is some later setup which calls VCPUOP_register_info and causes
cpus >= 33 to work. (since as the message says shared info only has
space for 32 cpus).

I think you want to be investigating the (lack of) calls to
VCPUOP_register_info.

> So questions:
> 
> 1) Had anybody else actually booted HVM guests with more than 32 VCPUs
>    and tried to migrate?

Not me.

Ian.


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel