Messages in this thread |  | | | Date | Mon, 22 Aug 2011 11:32:35 -0300 | | From | Marcelo Tosatti <> | | Subject | Re: [PATCH 02/11] KVM: x86: tag the instructions which are used to write page table |
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On Tue, Aug 16, 2011 at 02:41:27PM +0800, Xiao Guangrong wrote: > The idea is from Avi: > | tag instructions that are typically used to modify the page tables, and > | drop shadow if any other instruction is used. > | The list would include, I'd guess, and, or, bts, btc, mov, xchg, cmpxchg, > | and cmpxchg8b. > > This patch is used to tag the instructions and in the later path, shadow page > is dropped if it is written by other instructions
What is the advantage of doing this again? What is the point of dropping shadow if the instruction is emulated?
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