Re: [Xen-devel] [PATCH v3 9/9] mm: Make sure pages are scrubbed

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

>>> --- a/xen/common/page_alloc.c
>>> +++ b/xen/common/page_alloc.c
>>> @@ -694,6 +694,31 @@ static void page_list_add_scrub(struct page_info *pg, 
>>> unsigned int node,
>>>          page_list_add(pg, &heap(node, zone, order));
>>>  }
>>>  
>>> +#define SCRUB_BYTE_PATTERN 0xc2c2c2c2c2c2c2c2
>> This likely needs a ULL suffix at least for the ARM32 build.
> See 3ac7ca1
>
> So 0xe7f000f0 for ARM32 and AARCH64_BREAK_FAULT for ARM64.


That's slightly different though --- unlike free_init_memory() this
pattern is only used when !NDEBUG and it is byte-sized (passed into
memset()).


-boris

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