Izik Eidus wrote:
Marcelo Tosatti wrote:
/* Free page dirty bitmap if unneeded */
- if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
+ if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) {
new.dirty_bitmap = NULL;
+ if (old.flags & KVM_MEM_LOG_DIRTY_PAGES)
+ kvm_arch_flush_shadow(kvm);
+ }
Whats this for?
We have added all this SPTE_DONT_DIRTY..., when we stop dirty bit
tracking, we want to continue setting the dirty bit for the spte
inside set_spte(), so writing to the page would be faster....
Another way would be doing something like kvm_arch_clean_dont_dirty(),
might be better than flushing the whole shadow page tables.
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