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Re: [Xen-devel] [PATCH v7 2/4] xen/arm: grant: Add another entry to map MFN 1:1 in dom0 p2m
On 05/20/2014 12:25 PM, Ian Campbell wrote:
> On Tue, 2014-05-20 at 12:19 +0100, Julien Grall wrote:
>> FreeBSD is asking to write this buffer to the disk but from what I see
>> it mostly contains garbage (full of 0xc2).
>>
>> I can't find where this comes and wondering if you have any thoughts.
>
> 0xc2 is the value which Xen uses to scrub pages when debug=y (see
> xen/common/page_alloc.c:scrub_one_page).
I though about it, but I find strange that the guest is trying to write
non-modified page to the disk.
I will try to debug a bit more on it.
--
Julien Grall
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