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KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed

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Currently, kvm_mmu_zap_page() returning the number of freed children sp.
This might confuse the caller, because caller don't know the actual freed
number. Let's make kvm_mmu_zap_page() return the number of pages it actually
freed.

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gui Jianfeng 2010-05-05 09:03:49 +08:00 committed by Avi Kivity
parent 518c5a05e8
commit 54a4f0239f
1 changed files with 3 additions and 2 deletions
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5
arch/x86/kvm/mmu.c
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@ -1504,6 +1504,8 @@ static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp)
if (sp->unsync)
kvm_unlink_unsync_page(kvm, sp);
if (!sp->root_count) {
/* Count self */
ret++;
hlist_del(&sp->hash_link);
kvm_mmu_free_page(kvm, sp);
} else {
@ -1540,7 +1542,6 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
page = container_of(kvm->arch.active_mmu_pages.prev,
struct kvm_mmu_page, link);
used_pages -= kvm_mmu_zap_page(kvm, page);
used_pages--;
}
kvm_nr_mmu_pages = used_pages;
kvm->arch.n_free_mmu_pages = 0;
@ -2941,7 +2942,7 @@ static int kvm_mmu_remove_some_alloc_mmu_pages(struct kvm *kvm)
page = container_of(kvm->arch.active_mmu_pages.prev,
struct kvm_mmu_page, link);
return kvm_mmu_zap_page(kvm, page) + 1;
return kvm_mmu_zap_page(kvm, page);
}
static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)