KVM: MMU: reduce KVM_REQ_MMU_RELOAD when root page is zapped

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Quote Gleb's mail:
| why don't we check for sp->role.invalid in
| kvm_mmu_prepare_zap_page before calling kvm_reload_remote_mmus()?

and

| Actually we can add check for is_obsolete_sp() there too since
| kvm_mmu_invalidate_all_pages() already calls kvm_reload_remote_mmus()
| after incrementing mmu_valid_gen.

[ Xiao: add some comments and the check of is_obsolete_sp() ]

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

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Gleb Natapov 2013-05-31 08:36:30 +08:00

parent 365c886860

commit 05988d728d

1 changed files with 7 additions and 1 deletions

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arch/x86/kvm/mmu.c

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