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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-03-04 18:59:21 +0800 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-17 13:08:32 -0300 |
| commit | 48c0e4e9067eb085e7b300628c9640df071aac55 (patch) | |
| tree | 27cf74fd8a321df3be33954446236576b3b5b0a7 | |
| parent | 1b7fd45c32fcc170246bf10ba8d33871840319b8 (diff) | |
| download | linux-48c0e4e9067eb085e7b300628c9640df071aac55.tar.bz2 | |
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>
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 785ae0c300f7..b9c2b8e6c70c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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"); } + if (!kvm->arch.n_requested_mmu_pages) + nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); + spin_lock(&kvm->mmu_lock); - if (!kvm->arch.n_requested_mmu_pages) { - unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); + 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); } |