Re: [Xen-devel] [PATCH v1 9/9] mm: Make sure pages are scrubbed

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 03/29/2017 12:25 PM, Wei Liu wrote:
> On Fri, Mar 24, 2017 at 01:05:04PM -0400, Boris Ostrovsky wrote:
>> +static void check_one_page(struct page_info *pg)
>> +{
>> +    mfn_t mfn = _mfn(page_to_mfn(pg));
>> +    uint64_t *ptr;
>> +
>> +    ptr  = map_domain_page(mfn);
>> +    ASSERT(*ptr != PAGE_POISON);
> Should be ASSERT(*ptr == 0) here.

We can't assume it will be zero --- see scrub_one_page().

-boris

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