From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: Re: [PATCH 5/7] KVM: MMU: document fast page fault in Date: Wed, 19 Jun 2013 21:00:36 +0800 Message-ID: <51C1AB74.40503@linux.vnet.ibm.com> References: <1371632965-20077-1-git-send-email-xiaoguangrong@linux.vnet.ibm.com> <1371632965-20077-6-git-send-email-xiaoguangrong@linux.vnet.ibm.com> <51C1A083.9050209@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: gleb@redhat.com, avi.kivity@gmail.com, mtosatti@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org To: Paolo Bonzini Return-path: In-Reply-To: <51C1A083.9050209@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On 06/19/2013 08:13 PM, Paolo Bonzini wrote: > Il 19/06/2013 11:09, Xiao Guangrong ha scritto: >> Document fast page fault to Documentation/virtual/kvm/mmu.txt >> >> Signed-off-by: Xiao Guangrong >> --- >> Documentation/virtual/kvm/mmu.txt | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/Documentation/virtual/kvm/mmu.txt b/Documentation/virtual/kvm/mmu.txt >> index 4fb442b..b5ce7dd 100644 >> --- a/Documentation/virtual/kvm/mmu.txt >> +++ b/Documentation/virtual/kvm/mmu.txt >> @@ -275,6 +275,9 @@ Handling a page fault is performed as follows: >> information is stored and cache the information to vcpu->arch.mmio_gva, >> vcpu->arch.access and vcpu->arch.mmio_gfn then call the emulator to emulate >> the instruction who will get the benefit from the cached mmio info >> + - If both P bit and R/W bit of error code are set, there has a chance to >> + fast fix the page fault, please see the description of "Fast page fault" in >> + Documentation/virtual/kvm/locking.txt Nice.