Thank you a lot Tim.Your Method which consist of using shadow page
table help me.
However when I use the method shadow_blow_tables() I don't think it
makes all page unavailable.
because the the number of page fault (I get it from sh_page_fault) does
not seem to increase.
when shadow_blow_tables() is called this code is executed:
for_each_vcpu(d, v)
for ( i = 0 ; i < 4 ; i++ )
if ( !pagetable_is_null(v->arch.shadow_table[i]) )
shadow_unhook_mappings(v,
pagetable_get_mfn(v->arch.shadow_table[i]), 0);
I wonder about the '4' in the for loop. does it means that there is
only 4 shadow page table per-vcpu?
Thank you
On Thu, 19 Mar 2015 16:34:46 +0000, Tim Deegan wrote:
Hi,
Ah, no -- for PV guests you can't use the mem_event interface. :(
And the log-dirty code isn't quite what you want. But you could,
e.g., turn on shadow pagetables mode and track when frames are
accessed in the sh_page_fault() path. shadow_blow_tables() will then
make all pages unavailable again. If you want to make only some
pages
unavailable, you'll have to think of something cleverer. :)
Cheers,
Tim.
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