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SubjectRe: [PATCH 3/4] KVM: MMU: track dirty page in speculative path properly
On Tue, Jul 13, 2010 at 05:45:27PM +0800, Xiao Guangrong wrote:
> In speculative path, the page is not real write-access, no need mark it
> dirty, so clear dirty bit in this path and later examine this bit when
> we release the page
>
> Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
> ---
> arch/x86/kvm/mmu.c | 24 +++++++++++-------------
> 1 files changed, 11 insertions(+), 13 deletions(-)

Unfortunately all pages that kvm creates translations for are marked
dirty due to get_user_pages(w=1), except KSM which makes them read-only
later.




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