Re: [Xen-devel] Is this a data corruption bug for p2m_ram_shared page in hvm_hap_nested_page_fault()

["nai.xia" <nai.xia@xxxxxxxxx>]

On 2012å02æ02æ 18:17, nai.xia wrote:
> Hi,
>
> In hvm_hap_nested_page_fault(), it seems that all valid write faults are now 
> handled
> by p2m_mem_access_check(), right? Then when will mem_sharing_unshare_page()
> be called? And if p2m->access_required == false, the access restrictions is 
> cleared
Oh, sorry, I notice that with p2m_ram_shared, the write permissions is always 
cleared.
But, still, this seems cannot lead to the call of mem_sharing_unshare_page() 
and this
write fault will happen again and again?


Thanks,

Nai


> , then the data in this shared page could be corrupted by this page write 
> access?
>
>
> Thanks,
>
> Nai
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