Re: [Xen-devel] [PATCH] x86/EPT: flush cache when (potentially) limiting cachability

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.06.14 at 10:33, <songtaox.liu@xxxxxxxxx> wrote:
> Full L0 serial log as attached, it was from L0 boot to L2 guest creation.
> After creating L2, it takes nearly 15 minutes to print the last line of " 
> (XEN) chg[040000] d1 [hvm_set_guest_pat+0xad/0xb9]". 
> No other logs printed out in 20 minutes.

So then I suppose the problem are the two hvm_set_guest_pat()
invocations from vvmx.c. Thinking about it, the call from that function
to memory_type_changed() seems unnecessary - PAT_CR contents
don't influence the decision taken by epte_get_entry_emt(). Tim,
Kevin, you had looked at the original patch - would you agree?
Songtao - mind giving removal of that call a try to at least verify the
theory?

Jan


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