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KVM: MMU: don't walk every parent pages while mark unsync
authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Fri, 11 Jun 2010 13:35:15 +0000 (21:35 +0800)
committerAvi Kivity <avi@redhat.com>
Sun, 1 Aug 2010 07:46:45 +0000 (10:46 +0300)
While we mark the parent's unsync_child_bitmap, if the parent is already
unsynced, it no need walk it's parent, it can reduce some unnecessary
workload

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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