From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Sun, 15 May 2011 15:20:27 +0000 (+0800)
Subject: KVM: MMU: optimize pte write path if don't have protected sp
X-Git-Tag: v3.1-rc1~264^2~136
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=332b207d65c1d7982489dbb83e5071c95e19eb75;p=pandora-kernel.git

KVM: MMU: optimize pte write path if don't have protected sp

Simply return from kvm_mmu_pte_write path if no shadow page is
write-protected, then we can avoid to walk all shadow pages and hold
mmu-lock

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