Re: [Xen-devel] Question about scrub_heap_pages

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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


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