lkml.org 
[lkml]   [2011]   [May]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] KVM: MMU: optimize pte write path if don't have protected sp
On 05/11/2011 05:44 AM, Xiao Guangrong wrote:
> Simply return from kvm_mmu_pte_write path if no shadow page is
> write-protected, then we can avoid to walk all shadow pages and hold
> mmu-lock
>
> @@ -1038,8 +1038,10 @@ static void kvm_mmu_free_page(struct kvm *kvm, struct kvm_mmu_page *sp)
> hlist_del(&sp->hash_link);
> list_del(&sp->link);
> free_page((unsigned long)sp->spt);
> - if (!sp->role.direct)
> + if (!sp->role.direct) {
> free_page((unsigned long)sp->gfns);
> + atomic_dec(&kvm->arch.indirect_shadow_pages);
> + }
> kmem_cache_free(mmu_page_header_cache, sp);
> kvm_mod_used_mmu_pages(kvm, -1);
> }
> @@ -1536,6 +1538,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
> kvm_sync_pages(vcpu, gfn);
>
> account_shadowed(vcpu->kvm, gfn);
> + atomic_inc(&vcpu->kvm->arch.indirect_shadow_pages);
> }

Better in account_shadowed()/unaccount_shadowed(), no?


--
error compiling committee.c: too many arguments to function



\
 
 \ /
  Last update: 2011-05-11 18:25    [W:0.059 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site