Re: [PATCH 3/4] KVM: MMU: track dirty page in speculative pathproperly

[Marcelo Tosatti]

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@xxxxxxxxxxxxxx>
> ---
>  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.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/