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

Re: [Xen-devel] Question about scrub_heap_pages



>>> On 20.06.16 at 08:37, <chkwon91@xxxxxxxxx> wrote:
> Hi I am studying xen memory setup
> 
> I am wondering the job of scrub heap pages in setup_mm
> 
> If i see the code, it clear unallocated page by setting them to 0 using
> memset instruction
> 
> But it looks unneccessary assuming unallocated page will be written to
> valid data when it is qllocated
> 
> Is there special reason?

Contents of ages freed by the hypervisor or recovered from a dying
guest must not be exposed to another guest.

Jan


_______________________________________________
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®.