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

Re: [Xen-devel] incorrect layout of globals from head_64.S during kexec boot



On Tue, Jul 10, Ian Campbell wrote:

> On Tue, 2012-07-10 at 10:51 -0400, Konrad Rzeszutek Wilk wrote:
> > On Tue, Jul 10, 2012 at 08:46:34AM -0600, Ian Campbell wrote:
> > > On Tue, 2012-07-10 at 10:14 -0400, Konrad Rzeszutek Wilk wrote:
> > > > Which brings me to another question - say we do use this patch, what
> > > > if the decompressor overwrites the old kernels .data section. Won't
> > > > we run into this problem again?
> > > 
> > > I've not really been following this thread that closely but wouldn't the
> > > right answer be for the original kernel to unmap the shared info on
> > > kexec? Or maybe remap it up to some high/reserved address? Can it read
> > 
> > That would be the right answer I think, but I don't see the a 
> > VCPU_deregister
> > call (only VCPU_register).
> 
> Is the issue here vcpuinfo or the shared info (or both)?

shared info is the issue in PVonHVM.

Olaf

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


 


Rackspace

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