[PATCH 8/10] KVM MMU: allow more page become unsync at getting sp time
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From: Xiao Guangrong on 22 Apr 2010 02:20 Allow more page become asynchronous at getting sp time, if need create new shadow page for gfn but it not allow unsync(level > 0), we should unsync all gfn's unsync page Signed-off-by: Xiao Guangrong <xiaoguangrong(a)cn.fujitsu.com> --- arch/x86/kvm/mmu.c | 22 ++++++++++++++++++++-- 1 files changed, 20 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 13378e7..e0bb4d8 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1199,6 +1199,23 @@ static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, return 0; } +static void kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn) +{ + struct hlist_head *bucket; + struct kvm_mmu_page *s; + struct hlist_node *node, *n; + unsigned index; + + index = kvm_page_table_hashfn(gfn); + bucket = &vcpu->kvm->arch.mmu_page_hash[index]; + hlist_for_each_entry_safe(s, node, n, bucket, hash_link) { + if (s->gfn != gfn || !s->unsync) + continue; + WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL); + kvm_sync_page(vcpu, s, true); + } +} + struct mmu_page_path { struct kvm_mmu_page *parent[PT64_ROOT_LEVEL-1]; unsigned int idx[PT64_ROOT_LEVEL-1]; @@ -1334,8 +1351,9 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, trace_kvm_mmu_get_page(sp, false); return sp; } - if (unsync_sp) - kvm_sync_page(vcpu, unsync_sp, true); + + if (!direct && level > PT_PAGE_TABLE_LEVEL && unsync_sp) + kvm_sync_pages(vcpu, gfn); ++vcpu->kvm->stat.mmu_cache_miss; sp = kvm_mmu_alloc_page(vcpu, parent_pte); -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |