KVM: MMU: clear write-flooding on the fast path of tracked page

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If the page fault is caused by write access on write tracked page, the
real shadow page walking is skipped, we lost the chance to clear write
flooding for the page structure current vcpu is using

Fix it by locklessly waking shadow page table to clear write flooding
on the shadow page structure out of mmu-lock. So that we change the
count to atomic_t

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Xiao Guangrong 2016-02-24 17:51:12 +08:00 • committed by Paolo Bonzini

parent 3d0c27ad6e

commit e5691a81e8

3 changed files with 24 additions and 4 deletions

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2

arch/x86/include/asm/kvm_host.h

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22

arch/x86/kvm/mmu.c

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4

arch/x86/kvm/paging_tmpl.h

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