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KVM: MMU: move mmu pages calculated out of mmu lock 

kvm_mmu_calculate_mmu_pages need to walk all memslots and it's protected by
kvm->slots_lock, so move it out of mmu spinlock

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
hifive-unleashed-5.1
Xiao Guangrong 2011-03-04 18:59:21 +08:00 committed by Marcelo Tosatti
parent 1b7fd45c32
commit 48c0e4e906
1 changed files with 6 additions and 6 deletions
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12
arch/x86/kvm/x86.c
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@ -6105,7 +6105,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
int user_alloc)
{
int npages = mem->memory_size >> PAGE_SHIFT;
int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT;
if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
int ret;
@ -6120,12 +6120,12 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
"failed to munmap memory\n");
}
spin_lock(&kvm->mmu_lock);
if (!kvm->arch.n_requested_mmu_pages) {
unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
}
if (!kvm->arch.n_requested_mmu_pages)
nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
spin_lock(&kvm->mmu_lock);
if (nr_mmu_pages)
kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
kvm_mmu_slot_remove_write_access(kvm, mem->slot);
spin_unlock(&kvm->mmu_lock);
}