Re: [Xen-devel] [PATCH v2 0/4] xen: enable EPT A/D bit feature

["Hao, Xudong" <xudong.hao@xxxxxxxxx>]

Hi, Keir and Jan

Any other comments for this series of patches?

Thanks,
-Xudong


> -----Original Message-----
> From: Hao, Xudong
> Sent: Wednesday, June 20, 2012 9:58 AM
> To: xen-devel@xxxxxxxxxxxxx
> Cc: JBeulich@xxxxxxxx; keir@xxxxxxx; Zhang, Xiantao; Shan, Haitao; Hao,
> Xudong
> Subject: [PATCH v2 0/4] xen: enable EPT A/D bit feature
> 
> Changes from v1:
> - Move hap_has_dirty_bit and hap_has_access_bit definition from patch 3 to
> patch2.
> - define them as bool_t instead of int.
> 
> Extended Page Tables introduce two bit: access bit and dirty bit, A/D bits
> enable VMMs to efficiently implement memory management and page
> classification
> algorithms to optimize VM memory operations.
> 
> This series of patches enable EPT dirty bit feature for guest live migration.
> 
> PATCH 1/4: Add EPT A/D bits definitions.
> 
> PATCH 2/4: Add xen parameter to control A/D bits support, it on by default.
> 
> PATCH 3/4: Introduce a log_dirty new function update_dirty_bitmap, which will
> only update the log dirty bitmap, but won't clear the EPT page dirty bit.
> The function is used by live migration peek round with EPT D bit supported.
> 
> PATCH 4/4: enable EPT dirty bit for guest live migration.


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