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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-09-16 20:54:47 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-10-15 14:25:06 +0200 |
| commit | 4c2155ce81c193788082d4b8cdbc26d79edebc58 (patch) | |
| tree | 5c028fe4a18c55b5c0e9c4e80be459dad3f96da7 /arch/powerpc/kvm/44x_tlb.c | |
| parent | 777b3f49d297e387866604093b635e5bc9b9d2a6 (diff) | |
| download | linux-4c2155ce81c193788082d4b8cdbc26d79edebc58.tar.bz2 | |
KVM: switch to get_user_pages_fast
Convert gfn_to_pfn to use get_user_pages_fast, which can do lockless
pagetable lookups on x86. Kernel compilation on 4-way guest is 3.7%
faster on VMX.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/44x_tlb.c')
| -rw-r--r-- | arch/powerpc/kvm/44x_tlb.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c index 7b11fd7be542..2e227a412bc2 100644 --- a/arch/powerpc/kvm/44x_tlb.c +++ b/arch/powerpc/kvm/44x_tlb.c @@ -147,9 +147,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn, u64 asid, stlbe = &vcpu->arch.shadow_tlb[victim]; /* Get reference to new page. */ - down_read(¤t->mm->mmap_sem); new_page = gfn_to_page(vcpu->kvm, gfn); - up_read(¤t->mm->mmap_sem); if (is_error_page(new_page)) { printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n", gfn); kvm_release_page_clean(new_page); |